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  • Trouble recovering MySQL InnoDB database after server crash

    - by Andy Shinn
    I had a server crash due to a broken iSCSI link (the filesystem went into read-only mode). After repairing the link and rebooting the machine (CentOS 5 / MySQL 5.1), the MySQL server would not start and gave the following error: 100603 19:11:46 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql InnoDB: The log sequence number in ibdata files does not match InnoDB: the log sequence number in the ib_logfiles! 100603 19:11:46 InnoDB: Database was not shut down normally! InnoDB: Starting crash recovery. InnoDB: Reading tablespace information from the .ibd files... InnoDB: Restoring possible half-written data pages from the doublewrite InnoDB: buffer... InnoDB: Warning: database page corruption or a failed InnoDB: file read of page 112541. InnoDB: Trying to recover it from the doublewrite buffer. InnoDB: Dump of the page: 100603 19:11:46 InnoDB: Page dump in ascii and hex (16384 bytes): lots of binary data 100603 19:11:46 InnoDB: Page checksum 953720272, prior-to-4.0.14-form checksum 2641912043 InnoDB: stored checksum 617821918, prior-to-4.0.14-form stored checksum 2080617765 InnoDB: Page lsn 115 2632899642, low 4 bytes of lsn at page end 2641594600 InnoDB: Page number (if stored to page already) 112541, InnoDB: space id (if created with = MySQL-4.1.1 and stored already) 0 InnoDB: Page may be an index page where index id is 0 616 InnoDB: Dump of corresponding page in doublewrite buffer: 100603 19:11:46 InnoDB: Page dump in ascii and hex (16384 bytes): more binary data 100603 19:11:46 InnoDB: Page checksum 908374788, prior-to-4.0.14-form checksum 824841363 InnoDB: stored checksum 912869634, prior-to-4.0.14-form stored checksum 2210927931 InnoDB: Page lsn 115 2635312169, low 4 bytes of lsn at page end 2633173354 InnoDB: Page number (if stored to page already) 112541, InnoDB: space id (if created with = MySQL-4.1.1 and stored already) 0 InnoDB: Page may be an index page where index id is 0 616 InnoDB: Also the page in the doublewrite buffer is corrupt. InnoDB: Cannot continue operation. InnoDB: You can try to recover the database with the my.cnf InnoDB: option: InnoDB: innodb_force_recovery=6 100603 19:11:46 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended Per the error message, I have tried setting set-variable=innodb_force_recovery=6 in the my.cnf to get to the data. This allows the MySQL server to start. But when I try to do a mysqldump of the database or a SELECT * INTO OUTFILE "filename" FROM broken_table; it seems to endlessly just export the same line over and over again. I have also tried http://code.google.com/p/innodb-tools/. But this tool fails with an error that 'blob' type is not supported. If I try to access the data using the PHP application it crashes MySQL: `100603 19:19:19 - mysqld got signal 11 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. key_buffer_size=8384512 read_buffer_size=131072 max_used_connections=2 max_threads=151 threads_connected=2 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 338317 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd: 0x15d33f0 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 0x453aff00 thread_stack 0x40000 /usr/libexec/mysqld(my_print_stacktrace+0x24) [0x874364] /usr/libexec/mysqld(handle_segfault+0x346) [0x5c9166] /lib64/libpthread.so.0 [0x3a6e40eb10] /usr/libexec/mysqld(rec_get_offsets_func+0x30) [0x7cc310] /usr/libexec/mysqld [0x7674d8] /usr/libexec/mysqld(btr_search_info_update_slow+0x638) [0x768d48] /usr/libexec/mysqld(btr_cur_search_to_nth_level+0xc7d) [0x75f86d] /usr/libexec/mysqld [0x7dd1c1] /usr/libexec/mysqld(row_search_for_mysql+0x18b0) [0x7e03d0] /usr/libexec/mysqld(ha_innobase::general_fetch(unsigned char*, unsigned int, unsigned int)+0x7c) [0x7526fc] /usr/libexec/mysqld(handler::read_multi_range_next(st_key_multi_range**)+0x29) [0x6aed09] /usr/libexec/mysqld(QUICK_RANGE_SELECT::get_next()+0x194) [0x69a964] /usr/libexec/mysqld [0x6aafe9] /usr/libexec/mysqld(sub_select(JOIN*, st_join_table*, bool)+0x56) [0x635196] /usr/libexec/mysqld [0x63f9cd] /usr/libexec/mysqld(JOIN::exec()+0x950) [0x6497c0] /usr/libexec/mysqld(mysql_select(THD*, Item*, TABLE_LIST*, unsigned int, List&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsign ed long long, select_result*, st_select_lex_unit*, st_select_lex*)+0x17b) [0x64b34b] /usr/libexec/mysqld(handle_select(THD*, st_lex*, select_result*, unsigned long)+0x169) [0x64bc79] /usr/libexec/mysqld [0x5d34b6] /usr/libexec/mysqld(mysql_execute_command(THD*)+0x4e5) [0x5d6b45] /usr/libexec/mysqld(mysql_parse(THD*, char const*, unsigned int, char const)+0x211) [0x5dc321] /usr/libexec/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x10b8) [0x5dd3f8] /usr/libexec/mysqld(do_command(THD*)+0xe6) [0x5dd9e6] /usr/libexec/mysqld(handle_one_connection+0x73d) [0x5d036d] /lib64/libpthread.so.0 [0x3a6e40673d] /lib64/libc.so.6(clone+0x6d) [0x3a6d4d3d1d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd-query at 0x15de5e0 = SELECT DISTINCT count(DISTINCT i.itemid) as rowscount,i.hostid FROM items i WHERE ((i.itemid BETWEEN 000000000000000 AND 0999999 99999999)) AND i.type<9 AND (i.hostid IN (10017,10047,10050,10054,10056,10059,10062,10063,10064,10065,10066,10067,10068,10069,10070,10071,10072,10073,100 74,10075,10076,10077,10078,10079,10080,10081,10082,10084,10088,10089,10090,10091,10092,10093,10094,10095,10096,10097,10098,10099,10100,10101,10102,10103,10 104,10105,10106,10107,10108,10109)) GROUP BY i.hostid thd-thread_id=3 thd-killed=NOT_KILLED The manual page at contains information that should help you find out what is causing the crash. 100603 19:19:19 mysqld_safe Number of processes running now: 0 100603 19:19:19 mysqld_safe mysqld restarted` Before recovering form an older backup as a last resort I am looking for anymore suggestions. Thanks!

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  • Getting error 0x000003eb when installing DDK sample printer drivers

    - by Andy
    I've got a development machine, which has been severly abused when it comes to installing and removing printer drivers. I'm now at the stage where I want to install some sample printer drivers from the DDK (WDK), but unfortunately I get the message 'Unable to install printer. Operation could not be completed (error 0x000003eb). So I tried installing the same printer driver built from the DDK in a clean Win 7 x64 VM, and it works, so the only thing I can imagine is that the driver store or driver folder may be slightly corrupt from the many previous printer drivers I had installed. So my question is, is there anyway I can clean my system of old printer drivers / file? Or any repair functionality in windows that may replace the common windows printer drivers?

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  • OS X Mavericks Won't Connect To Ubuntu Server (Netatalk, Avahi)

    - by Andy Ibanez
    I'm really sorry for posting this. I know it may have been asked a thousand times. I have googled like crazy and I'm on the verge of desperation here. Basically, I followed this guide: http://motionsoundfx.com/2012/05/ubuntu-vnc-afp-macosx/ To create a small personal file server. When I installed it, I was able to connect to it just fine, I connected with my Ubuntu username and password and I was able to see the home directory. But later, I had to restart the file server so I could prepare a couple of other hard drives to put in. When the server restarted, I tried to connect to it, but I got an error message on my Mac: "The version of the server you're trying to connect to is not supported. Please contact your system administrator to solve this problem." Again, I have googled like crazy for this, and everybody says it is a problem with OS X Lion and up (assuming it affects Mavericks too). I have tried all the fixes mentioned for Lion and Mountain Lion and I haven't had any luck. That's the reason I'm posting this here: I suspect the problem is with my Ubuntu server. This happened after I restarted the server. Before restarting the server, I just put in my credentials and saw my home directory. Something when I restarted the server must have been messed up. I have found some other solutions, including to use "SHX2" in the conf file, but it hasn't worked for me. I ask for your help to solve this issue. Also please understand I'm completely illiterate when it comes to Linux. This is a nice chance to me to learn the OS so please give me detailed steps to do things if you deem it necessary. Thank you! I'm using Ubuntu Server 13.10 (the latest one as of today).

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  • yum list installed including version of all installed packages CentOS 5.4

    - by Andy
    I have a list of packages installed with yum on CentOS 5.4 [root@server ~]# yum list installed ... Installed Packages GConf2.x86_64 2.14.0-9.el5 installed ImageMagick.x86_64 6.2.8.0-4.el5_1.1 installed MAKEDEV.x86_64 3.23-1.2 installed MySQL-python.x86_64 1.2.1-1 installed I would like to download these rpms locally using yumdownloader --resolve MySQL-python-1.2.1-1.x86_64 etc. However the package formatting is different (MySQL-python.x86_64 1.2.1-1 vs MySQL-python-1.2.1-1.x86_64) so I am unable to download them using the above command. I don't want to have to parse the output of yum list installed, and I also don't want to use the contents of /var/log/yum.log* as I'll have to account for erased packages and version discrepancies. However /var/log/yum.log* does have the formatting I require... May 25 14:58:15 Installed: groff-1.18.1.1-11.1.x86_64 May 25 14:58:15 Installed: bzip2-1.0.3-4.el5_2.x86_64 Any suggestions?

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  • Using Bulk Operations with Coherence Off-Heap Storage

    - by jpurdy
    Some NamedCache methods (including clear(), entrySet(Filter), aggregate(Filter, …), invoke(Filter, …)) may generate large intermediate results. The size of these intermediate results may result in out-of-memory exceptions on cache servers, and in some cases on cache clients. This may be particularly problematic if out-of-memory exceptions occur on more than one server (since these operations may be cluster-wide) or if these exceptions cause additional memory use on the surviving servers as they take over partitions from the failed servers. This may be particularly problematic with clusters that use off-heap storage (such as NIO or Elastic Data storage options), since these storage options allow greater than normal cache sizes but do nothing to address the size of intermediate results or final result sets. One workaround is to use a PartitionedFilter, which allows the application to break up a larger operation into a number of smaller operations, each targeting either a set of partitions (useful for reducing the load on each cache server) or a set of members (useful for managing client result set sizes). It is also possible to return a key set, and then pull in the full entries using that key set. This also allows the application to take advantage of near caching, though this may be of limited value if the result is large enough to result in near cache thrashing.

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  • Repository query conditions, dependencies and DRY

    - by vFragosop
    To keep it simple, let's suppose an application which has Accounts and Users. Each account may have any number of users. There's also 3 consumers of UserRepository: An admin interface which may list all users Public front-end which may list all users An account authenticated API which should only list it's own users Assuming UserRepository is something like this: class UsersRepository extends DatabaseAbstraction { private function query() { return $this->database()->select('users.*'); } public function getAll() { return $this->query()->exec(); } // IMPORTANT: // Tons of other methods for searching, filtering, // joining of other tables, ordering and such... } Keeping in mind the comment above, and the necessity to abstract user querying conditions, How should I handle querying of users filtering by account_id? I can picture three possible roads: 1. Should I create an AccountUsersRepository? class AccountUsersRepository extends UserRepository { public function __construct(Account $account) { $this->account = $account; } private function query() { return parent::query() ->where('account_id', '=', $this->account->id); } } This has the advantage of reducing the duplication of UsersRepository methods, but doesn't quite fit into anything I've read about DDD so far (I'm rookie by the way) 2. Should I put it as a method on AccountsRepository? class AccountsRepository extends DatabaseAbstraction { public function getAccountUsers(Account $account) { return $this->database() ->select('users.*') ->where('account_id', '=', $account->id) ->exec(); } } This requires the duplication of all UserRepository methods and may need another UserQuery layer, that implements those querying logic on chainable way. 3. Should I query UserRepository from within my account entity? class Account extends Entity { public function getUsers() { return UserRepository::findByAccountId($this->id); } } This feels more like an aggregate root for me, but introduces dependency of UserRepository on Account entity, which may violate a few principles. 4. Or am I missing the point completely? Maybe there's an even better solution? Footnotes: Besides permissions being a Service concern, in my understanding, they shouldn't implement SQL query but leave that to repositories since those may not even be SQL driven.

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  • debian out of memory error server crash

    - by user42700
    hi, the server keeps crashing due to apache, is there any way i can stop this, the server has 2GB swap space and 3GB ram May 25 03:33:41 server kernel: [ 3513.200719] [<c015959c>] out_of_memory+0x14e/0x17f May 25 03:33:41 server kernel: [ 3513.211491] Out of memory: kill process 2936 (apache2) score 87364 or a child May 25 04:35:30 server kernel: [ 7239.936995] [<c015959c>] out_of_memory+0x14e/0x17f May 25 04:35:30 server kernel: [ 7239.948878] Out of memory: kill process 2936 (apache2) score 88236 or a child May 25 05:42:57 server kernel: [11210.572510] [<c015959c>] out_of_memory+0x14e/0x17f May 25 08:13:23 server kernel: [ 0.000000] PM: Registered nosave memory: 00000000000a0000 - 0000000000100000

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  • Sometimes big delay when using PHP mail()

    - by Robbert Dam
    I have a website which processes orders from a Windows application. This works as follows: User clicks "Order now" in the windows app App uploads a file with POST to a PHP script The script immediately calls the PHP mail() function (order is not stored in a db) This works fine most of the time. However, sometimes a big delay occurs (several days). Customers calls why the product has not yet been delivered. E-mail headers of delayed mail follows: Microsoft Mail Internet Headers Version 2.0 Received: from barracuda.nkl.nl ([10.0.0.1]) by smtp.nkl.nl with Microsoft SMTPSVC(6.0.3790.3959); Wed, 26 May 2010 16:26:51 +0200 X-ASG-Debug-ID: 1274883818-2f8800000000-X58hIK X-Barracuda-URL: http://10.0.0.1:8000/cgi-bin/mark.cgi Received: from server45.firstfind.nl (localhost [127.0.0.1]) by barracuda.nkl.nl (Spam & Virus Firewall) with ESMTP id ECAFD15776A for <[email protected]>; Wed, 26 May 2010 16:23:38 +0200 (CEST) Received: from server45.firstfind.nl (server45.firstfind.nl [93.94.226.76]) by barracuda.nkl.nl with ESMTP id 85bAT2AU58kkxjPb for <[email protected]>; Wed, 26 May 2010 16:23:38 +0200 (CEST) X-Barracuda-Envelope-From: [email protected] Received: from server45.firstfind.nl (localhost [127.0.0.1]) by server45.firstfind.nl (8.13.8/8.13.8/Debian-3+etch1) with ESMTP id o4QEM3Hb004301 for <[email protected]>; Wed, 26 May 2010 16:23:31 +0200 Received: (from nklsemin@localhost) by server45.firstfind.nl (8.13.8/8.13.8/Submit) id o4J9lA7M031307; Wed, 19 May 2010 11:47:10 +0200 Date: Wed, 19 May 2010 11:47:10 +0200 Message-Id: <[email protected]> To: [email protected] X-ASG-Orig-Subj: easyfit - ref: Hoen3443 Subject: easyfit - ref: Hoen3443 X-PHP-Script: www.nklseminar.nl/emailer/upload.php for 77.61.220.217 From: [email protected] Content-type: text/html X-Virus-Scanned: by amavisd-new X-Barracuda-Connect: server45.firstfind.nl[93.94.226.76] X-Barracuda-Start-Time: 1274883820 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by Barracuda Spam & Virus Firewall at nkl.nl X-Barracuda-Spam-Score: 0.92 X-Barracuda-Spam-Status: No, SCORE=0.92 using global scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=3.0 tests=DATE_IN_PAST_96_XX, DATE_IN_PAST_96_XX_2, HTML_MESSAGE, MIME_HEADER_CTYPE_ONLY, MIME_HTML_ONLY, NO_REAL_NAME X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.30817 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 NO_REAL_NAME From: does not include a real name 0.01 DATE_IN_PAST_96_XX Date: is 96 hours or more before Received: date 0.00 MIME_HTML_ONLY BODY: Message only has text/html MIME parts 0.00 HTML_MESSAGE BODY: HTML included in message 0.86 MIME_HEADER_CTYPE_ONLY 'Content-Type' found without required MIME headers 2.07 DATE_IN_PAST_96_XX_2 DATE_IN_PAST_96_XX_2 Return-Path: [email protected] X-OriginalArrivalTime: 26 May 2010 14:26:51.0343 (UTC) FILETIME=[7B80DDF0:01CAFCDF] The delay seems to occur here: Received: from server45.firstfind.nl (localhost [127.0.0.1]) by server45.firstfind.nl (8.13.8/8.13.8/Debian-3+etch1) with ESMTP id o4QEM3Hb004301 for <[email protected]>; Wed, 26 May 2010 16:23:31 +0200 Received: (from nklsemin@localhost) by server45.firstfind.nl (8.13.8/8.13.8/Submit) id o4J9lA7M031307; Wed, 19 May 2010 11:47:10 +0200 I've reported this issue various times to the web hosting service that hosts my website. They say the delay does not occur in their network (impossible). But they do confirm that the e-mail is first seen in their mail server on May 26, which is 7 days after the mail has been composed. The order is marked with the timestamp of the user's local PC, which also matches May 19 (so it's not a PC clock problem) It's also interesting to see that all delayed mails (orders were placed on different days) come in at once. So I suddenly receive 14 e-mail in my mailbox from various days. Any idea were this delay may be introduced? Could there be a bug in my PHP code that causes this? (I cannot believe I can introduce a loop of 7 days in my PHP code)

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  • PASS: Bylaw Change 2013

    - by Bill Graziano
    PASS launched a Global Growth Initiative in the Summer of 2011 with the appointment of three international Board advisors.  Since then we’ve thought and talked extensively about how we make PASS more relevant to our members outside the US and Canada.  We’ve collected much of that discussion in our Global Growth site.  You can find vision documents, plans, governance proposals, feedback sites, and transcripts of Twitter chats and town hall meetings.  We also address these plans at the Board Q&A during the 2012 Summit. One of the biggest changes coming out of this process is around how we elect Board members.  And that requires a change to the bylaws.  We published the proposed bylaw changes as a red-lined document so you can clearly see the changes.  Our goal in these bylaw changes was to address the changes required by the global growth initiatives, conduct a legal review of the document and address other minor issues in the document.  There are numerous small wording changes throughout the document.  For example, we replaced every reference of “The Corporation” with the word “PASS” so it now reads “PASS is organized…”. Board Composition The biggest change in these bylaw changes is how the Board is composed and elected.  This discussion starts in section VI.2.  This section now says that some elected directors will come from geographic regions.  I think this is the best way to make sure we give all of our members a voice in the leadership of the organization.  The key parts of this section are: The remaining Directors (i.e. the non-Officer Directors and non-Vendor Appointed Directors) shall be elected by the voting membership (“Elected Directors”). Elected Directors shall include representatives of defined PASS regions (“Regions”) as set forth below (“Regional Directors”) and at minimum one (1) additional Director-at-Large whose selection is not limited by region. Regional Directors shall include, but are not limited to, two (2) seats for the Region covering Canada and the United States of America. Additional Regions for the purpose of electing additional Regional Directors and additional Director-at-Large seats for the purpose of expanding the Board shall be defined by a majority vote of the current Board of Directors and must be established prior to the public call for nominations in the general election. Previously defined Regions and seats approved by the Board of Directors shall remain in effect and can only be modified by a 2/3 majority vote by the then current Board of Directors. Currently PASS has six At-Large Directors elected by the members.  These changes allow for a Regional Director position that is elected by the members but must come from a particular region.  It also stipulates that there must always be at least one Director-at-Large who can come from any region. We also understand that PASS is currently a very US-centric organization.  Our Summit is held in America, roughly half our chapters are in the US and Canada and most of the Board members over the last ten years have come from America.  We wanted to reflect that by making sure that our US and Canadian volunteers would continue to play a significant role by ensuring that two Regional seats are reserved specifically for Canada and the US. Other than that, the bylaws don’t create any specific regional seats.  These rules allow us to create Regional Director seats but don’t require it.  We haven’t fully discussed what the criteria will be in order for a region to have a seat designated for it or how many regions there will be.  In our discussions we’ve broadly discussed regions for United States and Canada Europe, Middle East, and Africa (EMEA) Australia, New Zealand and Asia (also known as Asia Pacific or APAC) Mexico, South America, and Central America (LATAM) As you can see, our thinking is that there will be a few large regions.  I’ve also considered a non-North America region that we can gradually split into the regions above as our membership grows in those areas.  The regions will be defined by a policy document that will be published prior to the elections. I’m hoping that over the next year we can begin to publish more of what we do as Board-approved policy documents. While the bylaws only require a single non-region specific At-large Director, I would expect we would always have two.  That way we can have one in each election.  I think it’s important that we always have one seat open that anyone who is eligible to run for the Board can contest.  The Board is required to have any regions defined prior to the start of the election process. Board Elections – Regional Seats We spent a lot of time discussing how the elections would work for these Regional Director seats.  Ultimately we decided that the simplest solution is that every PASS member should vote for every open seat.  Section VIII.3 reads: Candidates who are eligible (i.e. eligible to serve in such capacity subject to the criteria set forth herein or adopted by the Board of Directors) shall be designated to fill open Board seats in the following order of priority on the basis of total votes received: (i) full term Regional Director seats, (ii) full term Director-at-Large seats, (iii) not full term (vacated) Regional Director seats, (iv) not full term (vacated) Director-at-Large seats. For the purposes of clarity, because of eligibility requirements, it is contemplated that the candidates designated to the open Board seats may not receive more votes than certain other candidates who are not selected to the Board. We debated whether to have multiple ballots or one single ballot.  Multiple ballot elections get complicated quickly.  Let’s say we have a ballot for US/Canada and one for Region 2.  After that we’d need a mechanism to merge those two together and come up with the winner of the at-large seat or have another election for the at-large position.  We think the best way to do this is a single ballot and putting the highest vote getters into the most restrictive seats.  Let’s look at an example: There are seats open for Region 1, Region 2 and at-large.  The election results are as follows: Candidate A (eligible for Region 1) – 550 votes Candidate B (eligible for Region 1) – 525 votes Candidate C (eligible for Region 1) – 475 votes Candidate D (eligible for Region 2) – 125 votes Candidate E (eligible for Region 2) – 75 votes In this case, Candidate A is the winner for Region 1 and is assigned that seat.  Candidate D is the winner for Region 2 and is assigned that seat.  The at-large seat is filled by the high remaining vote getter which is Candidate B. The key point to understand is that we may have a situation where a person with a lower vote total is elected to a regional seat and a person with a higher vote total is excluded.  This will be true whether we had multiple ballots or a single ballot.  Board Elections – Vacant Seats The other change to the election process is for vacant Board seats.  The actual changes are sprinkled throughout the document. Previously we didn’t have a mechanism that allowed for an election of a Board seat that we knew would be vacant in the future.  The most common case is when a Board members moves to an Officer role in the middle of their term.  One of the key changes is to allow the number of votes members have to match the number of open seats.  This allows each voter to express their preference on all open seats.  This only applies when we know about the opening prior to the call for nominations.  This all means that if there’s a seat will be open at the start of the next Board term, and we know about it prior to the call for nominations, we can include that seat in the elections.  Ultimately, the aim is to have PASS members decide who sits on the Board in as many situations as possible. We discussed the option of changing the bylaws to just take next highest vote-getter in all other cases.  I think that’s wrong for the following reasons: All voters aren’t able to express an opinion on all candidates.  If there are five people running for three seats, you can only vote for three.  You have no way to express your preference between #4 and #5. Different candidates may have different information about the number of seats available.  A person may learn that a Board member plans to resign at the end of the year prior to that information being made public. They may understand that the top four vote getters will end up on the Board while the rest of the members believe there are only three openings.  This may affect someone’s decision to run.  I don’t think this creates a transparent, fair election. Board members may use their knowledge of the election results to decide whether to remain on the Board or not.  Admittedly this one is unlikely but I don’t want to create a situation where this accusation can be leveled. I think the majority of vacancies in the future will be handled through elections.  The bylaw section quoted above also indicates that partial term vacancies will be filled after the full term seats are filled. Removing Directors Section VI.7 on removing directors has always had a clause that allowed members to remove an elected director.  We also had a clause that allowed appointed directors to be removed.  We added a clause that allows the Board to remove for cause any director with a 2/3 majority vote.  The updated text reads: Any Director may be removed for cause by a 2/3 majority vote of the Board of Directors whenever in its judgment the best interests of PASS would be served thereby. Notwithstanding the foregoing, the authority of any Director to act as in an official capacity as a Director or Officer of PASS may be suspended by the Board of Directors for cause. Cause for suspension or removal of a Director shall include but not be limited to failure to meet any Board-approved performance expectations or the presence of a reason for suspension or dismissal as listed in Addendum B of these Bylaws. The first paragraph is updated and the second and third are unchanged (except cleaning up language).  If you scroll down and look at Addendum B of these bylaws you find the following: Cause for suspension or dismissal of a member of the Board of Directors may include: Inability to attend Board meetings on a regular basis. Inability or unwillingness to act in a capacity designated by the Board of Directors. Failure to fulfill the responsibilities of the office. Inability to represent the Region elected to represent Failure to act in a manner consistent with PASS's Bylaws and/or policies. Misrepresentation of responsibility and/or authority. Misrepresentation of PASS. Unresolved conflict of interests with Board responsibilities. Breach of confidentiality. The bold line about your inability to represent your region is what we added to the bylaws in this revision.  We also added a clause to section VII.3 allowing the Board to remove an officer.  That clause is much less restrictive.  It doesn’t require cause and only requires a simple majority. The Board of Directors may remove any Officer whenever in their judgment the best interests of PASS shall be served by such removal. Other There are numerous other small changes throughout the document. Proxy voting.  The laws around how members and Board members proxy votes are specific in Illinois law.  PASS is an Illinois corporation and is subject to Illinois laws.  We changed section IV.5 to come into compliance with those laws.  Specifically this says you can only vote through a proxy if you have a written proxy through your authorized attorney.  English language proficiency.  As we increase our global footprint we come across more members that aren’t native English speakers.  The business of PASS is conducted in English and it’s important that our Board members speak English.  If we get big enough to afford translators, we may be able to relax this but right now we need English language skills for effective Board members. Committees.  The language around committees in section IX is old and dated.  Our lawyers advised us to clean it up.  This section specifically applies to any committees that the Board may form outside of portfolios.  We removed the term limits, quorum and vacancies clause.  We don’t currently have any committees that this would apply to.  The Nominating Committee is covered elsewhere in the bylaws. Electronic Votes.  The change allows the Board to vote via email but the results must be unanimous.  This is to conform with Illinois state law. Immediate Past President.  There was no mechanism to fill the IPP role if an outgoing President chose not to participate.  We changed section VII.8 to allow the Board to invite any previous President to fill the role by majority vote. Nominations Committee.  We’ve opened the language to allow for the transparent election of the Nominations Committee as outlined by the 2011 Election Review Committee. Revocation of Charters. The language surrounding the revocation of charters for local groups was flagged by the lawyers. We have allowed for the local user group to make all necessary payment before considering returning of items to PASS if required. Bylaw notification. We’ve spent countless meetings working on these bylaws with the intent to not open them again any time in the near future. Should the bylaws be opened again, we have included a clause ensuring that the PASS membership is involved. I’m proud that the Board has remained committed to transparency and accountability to members. This clause will require that same level of commitment in the future even when all the current Board members have rolled off. I think that covers everything.  I’d encourage you to look through the red-line document and see the changes.  It’s helpful to look at the language that’s being removed and the language that’s being added.  I’m happy to answer any questions here or you can email them to [email protected].

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  • How to deal with configuration style warnings occuring from TexLive 2012 installation?

    - by JJD
    I followed the advice of izx on how to install TexLive 2012 using the texlive-backports PPA. Before I started I removed all TexLive-related packages. The installation finished and everything seems to work fine. The only thing I noticed are some warnings in the output of the installer. Here is an excerpt of the output: Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg There are more of that kind in the rest of the output: $ sudo apt-get install texlive Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: latex-beamer latex-xcolor libgraphite3 libkpathsea6 libptexenc1 lmodern pgf prosper ps2eps tex-common tex-gyre texlive-base texlive-binaries texlive-common texlive-doc-base texlive-extra-utils texlive-font-utils texlive-fonts-recommended texlive-fonts-recommended-doc texlive-generic-recommended texlive-latex-base texlive-latex-base-doc texlive-latex-recommended texlive-latex-recommended-doc texlive-pstricks texlive-pstricks-doc tipa ttf-marvosym Suggested packages: texlive-doc-en purifyeps chktex latexmk dvipng xindy dvidvi fragmaster lacheck latexdiff t1utils The following NEW packages will be installed: latex-beamer latex-xcolor libgraphite3 libkpathsea6 libptexenc1 lmodern pgf prosper ps2eps tex-common tex-gyre texlive texlive-base texlive-binaries texlive-common texlive-doc-base texlive-extra-utils texlive-font-utils texlive-fonts-recommended texlive-fonts-recommended-doc texlive-generic-recommended texlive-latex-base texlive-latex-base-doc texlive-latex-recommended texlive-latex-recommended-doc texlive-pstricks texlive-pstricks-doc tipa ttf-marvosym 0 upgraded, 29 newly installed, 0 to remove and 17 not upgraded. Need to get 0 B/274 MB of archives. After this operation, 450 MB of additional disk space will be used. Do you want to continue [Y/n]? Preconfiguring packages ... Selecting previously unselected package tex-common. (Reading database ... 290206 files and directories currently installed.) Unpacking tex-common (from .../tex-common_3.13~ubuntu12.04.1_all.deb) ... Selecting previously unselected package lmodern. Unpacking lmodern (from .../lmodern_2.004.1-5~precise1_all.deb) ... Selecting previously unselected package tex-gyre. Unpacking tex-gyre (from .../tex-gyre_2.004.1-4~precise1_all.deb) ... Selecting previously unselected package libgraphite3. Unpacking libgraphite3 (from .../libgraphite3_1%3a2.3.1-0.2build1_amd64.deb) ... Selecting previously unselected package libkpathsea6. Unpacking libkpathsea6 (from .../libkpathsea6_2012.20120628-1~ubuntu12.04.1_amd64.deb) ... Selecting previously unselected package libptexenc1. Unpacking libptexenc1 (from .../libptexenc1_2012.20120628-1~ubuntu12.04.1_amd64.deb) ... Selecting previously unselected package texlive-common. Unpacking texlive-common (from .../texlive-common_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-binaries. Unpacking texlive-binaries (from .../texlive-binaries_2012.20120628-1~ubuntu12.04.1_amd64.deb) ... Selecting previously unselected package texlive-doc-base. Unpacking texlive-doc-base (from .../texlive-doc-base_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-base. Unpacking texlive-base (from .../texlive-base_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-latex-base. Unpacking texlive-latex-base (from .../texlive-latex-base_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-latex-recommended. Unpacking texlive-latex-recommended (from .../texlive-latex-recommended_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package latex-xcolor. Unpacking latex-xcolor (from .../latex-xcolor_2.11-1_all.deb) ... Selecting previously unselected package pgf. Unpacking pgf (from .../archives/pgf_2.10-1_all.deb) ... Selecting previously unselected package latex-beamer. Unpacking latex-beamer (from .../latex-beamer_3.10-1_all.deb) ... Selecting previously unselected package texlive-generic-recommended. Unpacking texlive-generic-recommended (from .../texlive-generic-recommended_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-pstricks. Unpacking texlive-pstricks (from .../texlive-pstricks_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package prosper. Unpacking prosper (from .../prosper_1.00.4+cvs.2007.05.01-4_all.deb) ... Selecting previously unselected package ps2eps. Unpacking ps2eps (from .../ps2eps_1.68-1_amd64.deb) ... Selecting previously unselected package ttf-marvosym. Unpacking ttf-marvosym (from .../ttf-marvosym_0.1+dfsg-2_all.deb) ... Selecting previously unselected package texlive-fonts-recommended. Unpacking texlive-fonts-recommended (from .../texlive-fonts-recommended_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive. Unpacking texlive (from .../texlive_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-extra-utils. Unpacking texlive-extra-utils (from .../texlive-extra-utils_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-font-utils. Unpacking texlive-font-utils (from .../texlive-font-utils_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-fonts-recommended-doc. Unpacking texlive-fonts-recommended-doc (from .../texlive-fonts-recommended-doc_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-latex-base-doc. Unpacking texlive-latex-base-doc (from .../texlive-latex-base-doc_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-latex-recommended-doc. Unpacking texlive-latex-recommended-doc (from .../texlive-latex-recommended-doc_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-pstricks-doc. Unpacking texlive-pstricks-doc (from .../texlive-pstricks-doc_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package tipa. Unpacking tipa (from .../tipa_2%3a1.3-17~precise1_all.deb) ... Processing triggers for doc-base ... Processing 5 added doc-base files... Registering documents with scrollkeeper... Processing triggers for man-db ... Processing triggers for fontconfig ... Processing triggers for install-info ... Setting up tex-common (3.13~ubuntu12.04.1) ... Running mktexlsr. This may take some time... done. texlive-base is not ready, delaying updmap-sys call texlive-base is not ready, skipping fmtutil-sys --all call Setting up lmodern (2.004.1-5~precise1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up tex-gyre (2.004.1-4~precise1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up libgraphite3 (1:2.3.1-0.2build1) ... Setting up libkpathsea6 (2012.20120628-1~ubuntu12.04.1) ... Setting up libptexenc1 (2012.20120628-1~ubuntu12.04.1) ... Setting up texlive-common (2012.20120611-3~ubuntu12.04.1) ... Setting up texlive-binaries (2012.20120628-1~ubuntu12.04.1) ... update-alternatives: using /usr/bin/xdvi-xaw to provide /usr/bin/xdvi.bin (xdvi.bin) in auto mode. update-alternatives: using /usr/bin/bibtex.original to provide /usr/bin/bibtex (bibtex) in auto mode. mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEMAIN... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEDIST... mktexlsr: Updating /var/lib/texmf/ls-R-TEXMFMAIN... mktexlsr: Updating /var/lib/texmf/ls-R... mktexlsr: Done. Building format(s) --refresh. This may take some time... done. Setting up texlive-doc-base (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up ps2eps (1.68-1) ... Setting up ttf-marvosym (0.1+dfsg-2) ... Setting up texlive-fonts-recommended-doc (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-latex-base-doc (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-latex-recommended-doc (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-pstricks-doc (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Processing triggers for tex-common ... Running mktexlsr. This may take some time... done. texlive-base is not ready, delaying updmap-sys call Setting up texlive-base (2012.20120611-3~ubuntu12.04.1) ... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEMAIN... mktexlsr: Updating /var/lib/texmf/ls-R-TEXMFMAIN... mktexlsr: Updating /var/lib/texmf/ls-R... mktexlsr: Done. /usr/bin/tl-paper: setting paper size for dvips to a4. /usr/bin/tl-paper: setting paper size for dvipdfmx to a4. /usr/bin/tl-paper: setting paper size for xdvi to a4. /usr/bin/tl-paper: setting paper size for pdftex to a4. Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Running mktexlsr. This may take some time... done. Building format(s) --all. This may take some time... done. Processing triggers for tex-common ... Running updmap-sys. This may take some time... done. Running mktexlsr /var/lib/texmf ... done. Setting up texlive-generic-recommended (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-fonts-recommended (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-extra-utils (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-font-utils (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-latex-base (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Running mktexlsr. This may take some time... done. Building format(s) --all --cnffile /etc/texmf/fmt.d/10texlive-latex-base.cnf. This may take some time... done. Processing triggers for tex-common ... Running mktexlsr. This may take some time... done. Running updmap-sys. This may take some time... done. Running mktexlsr /var/lib/texmf ... done. Setting up texlive-pstricks (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up tipa (2:1.3-17~precise1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-latex-recommended (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Processing triggers for tex-common ... Running mktexlsr. This may take some time... done. Running updmap-sys. This may take some time... done. Running mktexlsr /var/lib/texmf ... done. Setting up prosper (1.00.4+cvs.2007.05.01-4) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Running mktexlsr. This may take some time... done. Setting up texlive (2012.20120611-3~ubuntu12.04.1) ... Setting up latex-xcolor (2.11-1) ... mktexlsr: Updating /usr/local/share/texmf/ls-R... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEMAIN... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEDIST... mktexlsr: Updating /var/lib/texmf/ls-R-TEXMFMAIN... mktexlsr: Updating /var/lib/texmf/ls-R... mktexlsr: Done. Setting up pgf (2.10-1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Processing triggers for tex-common ... Running mktexlsr. This may take some time... done. Setting up latex-beamer (3.10-1) ... mktexlsr: Updating /usr/local/share/texmf/ls-R... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEMAIN... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEDIST... mktexlsr: Updating /var/lib/texmf/ls-R-TEXMFMAIN... mktexlsr: Updating /var/lib/texmf/ls-R... mktexlsr: Done. Processing triggers for libc-bin ... ldconfig deferred processing now taking place What exactly is 10lmodern.cfg good for? How can I prevent this warnings? Here is the output of sudo update-updmap: $ sudo update-updmap Regenerating '/var/lib/texmf/updmap.cfg-DEBIAN'... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg done. Regenerating '/var/lib/texmf/updmap.cfg-TEXLIVEDIST'... done. update-updmap has updated the following file(s): /var/lib/texmf/updmap.cfg-DEBIAN /var/lib/texmf/updmap.cfg-TEXLIVEDIST If you want to enable the map files with this new file, you should run updmap-sys or updmap.

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  • Is there a bash shortcut for traversing similar directory structures?

    - by Steve Weet
    The Korn shell used to have a very useful option to cd for traversing similar directory structures e.g. given the following directorys /home/sweet/dev/projects/trunk/projecta/app/models /home/andy/dev/projects/trunk/projecta/app/models Then if you were in the /home/sweet.... directory then you could change to the equivalent directory in andy's structure by typing cd sweet andy So if ksh saw 2 arguments then it would scan the current directory path for the first value, replace it with the second and cd there. Is anyone aware of similar functionality in bash. EDIT 1 Following on from Michal's excellent answer I have now created the following bash function called scd (For Sideways cd) function scd { cd "${PWD/$1/$2}" } EDIT 2 Thanks to @digitalross I can now reproduce the ksh functionality exactly with the code from below (With the addition of a pwd to tell you where you have changed to) cd () { if [ "x$2" != x ]; then builtin cd ${PWD/$1/$2} pwd else builtin cd "$@" fi }

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  • SQL: Find difference between dates with grouping

    - by ajbeaven
    I have a problem that seems similar to this fellow - I just want to display the data slightly differently. I'm pretty terrible with SQL so can't modify it to suit, but perhaps someone else can. My table looks similar to this (date format is dd/mm/yyyy): ID User Date_start Role 1 Andy 01/04/2010 A 2 Andy 10/04/2010 B 3 Andy 20/04/2010 A 4 John 02/05/2010 A I want to show the total number of days that anyone was in a certain role. Users stay in the role until there is another entry into the table. Users can only be in one role at a time. So the summary data would look like this (assuming that the date is 04/05/2010): A: 26 days B: 10 days Thanks for any help :)

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  • Exchange 2007 restore - Backup Exec Unable to Attach to a resource

    - by Andy
    I have been struggling with this one for months! Grateful for any advice. The setup is a windows 2003 server network, 4xservers on the domain. Two exchange 2007 servers (only one with mailboxes still on). Backup Exec (12.5) on a non-exchange server with agents on the others. Backup exec runs a full backup of exchange across the network well, at pretty reasonable speeds. However, when you try any kind of restore (individual emails, mailboxes or whole system restore - all to same location or to alternate server, RSG etc) the following message is received within about 10-15 secs of starting the job: Job ended: 24 December 2010 at 13:28:32 Completed status: Failed Final error: 0xe000848c - Unable to attach to a resource. Make sure that all selected resources exist and are online, and then try again. If the server or resource no longer exists, remove it from the selection list. Edit the selection list properties, click the View Selection Details tab, and then remove the resource. Final error category: Resource Errors For additional information regarding this error refer to link V-79-57344-33932 Things I have already tried: Changed account to main administrator account (with all permissions) checked versions of ese.dll on both servers - both the same Checked all VSS writers on both servers are stable / normal restoring to different locations Any advice anyone could give would be much appreciated. Many thanks, Andy

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  • Error 720 on VPN (PPTP) attempt

    - by Andy Shulman
    When I attempt to connect to a server running XP x64 (so essentially Server 2003) using a PPTP connection, it fails with client-side error Registering your computer on the network... Error 720: A connection to the remote computer could not be established. You might need to change the network settings for this configuration. and server-side error Event ID: 20050 The user WINSERV3\Andy connected to port VPN8-1 has been disconnected because no network protocols were successfully negotiated. I have configured the router to pass both TCP packets on 1723 and GRE packets. I have used Wireshark (filtering out ARP, UDP, and all TCP ports other than 1723) to observe the packets received by the server. Wireshark does not explicitly name any protocol GRE, but it does tell me the server sent and received TCP, PPTP, PPP LCP, PPP CHAP, PPP CBCP, and PPP IPCP. The connection seems to go wrong at packet 30, where the protocol is PPP LCP, with the payload of the packet being labeled "Protocol Reject". Obviously, this is going from server to client. This would seem to lead to the conclusion that there is something wrong with my client, which runs Windows 7 Ultimate x64. However, it is able to connect to my house's router, which runs the DD-WRT firmware and is thus a PPTP endpoint. I'm thoroughly at a loss. Please help!

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  • sendmail relay status

    - by Andy
    Hello all, I have a RHEL3 server with sendmail configured to relay mail to: # "Smart" relay host (may be null) DSmailrelay This relay server is an exchange server not administered by me. A few days ago its IP address was changed without my knowledge so I've updated the correct ip in /etc/hosts for the mail relay entry. Unfortunately no mail is currently going through and maillog reports: Oct 26 14:32:39 fsimag sendmail[12580]: n9Q3VxPA012580: from=root, size=3685, class=0, nrcpts=1, msgid=<~R.*.2009102614315955@*>, relay=root@localhost Oct 26 14:32:39 fsimag sendmail[12580]: n9Q3VxPA012580: to=wodwest@*.net, delay=00:00:40, mailer=esmtp, pri=33685, dsn=4.4.3, stat=queued Oct 26 14:36:09 fsimag sendmail[13670]: n9Q3ZTcf013670: from=root, size=5831, class=0, nrcpts=1, msgid=<~R.medicus.2009102614352914@*>, relay=root@localhost Oct 26 14:36:09 fsimag sendmail[13670]: n9Q3ZTcf013670: to=tsgastro@(.net, delay=00:00:40, mailer=esmtp, pri=35831, dsn=4.4.3, stat=queued Oct 26 14:36:50 fsimag sendmail[13882]: n9Q3aAxj013882: from=root, size=5830, class=0, nrcpts=1, msgid=<~C.medicus.2009102614361009@*>, relay=root@localhost Oct 26 14:36:50 fsimag sendmail[13882]: n9Q3aAxj013882: to=elmwood@*.net, delay=00:00:40, mailer=esmtp, pri=35830, dsn=4.4.3, stat=queued (With domains obscured) The mailq command shows nothing, and I've also tried connecting to this new mail server via telnet and manually sending and reports as being queued but not sent. The administrator of this machine has put it back to me saying he sees no problems, and I just want to cover everything before passing it back to him. Is there any other tests/logs/reasons for sendmail to only report it as "stat=queued" ? I've looked in previous logs and the relay is set to root@localhost in those but none were ever set to queued. Thanks for any help, Andy

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  • 3 Servers, is this is a cluster?

    - by Andy Barlow
    Hello, At the moment I have one Ubuntu server, 9.10, running with a simple Samba share, a mail server, DNS server and DHCP server. Mostly its just there for file sharing and email server. I also have 2 other servers that are exactly the same hardware and spec as the first, which have an rsync set up to retrieve the shared folders and backs them up. However, if the first server goes down, all of our shares disappear along with our mail and the system must be rebuilt. Also I tend to find if people are downloading a large amount from the file server, no-one can access there emails - especially in the morning when everyone is signing in at once. Would it be more beneficial for me to have all 3 servers, all running the same services, doing the same thing with some sort of cluster with load balancing? I'm not really sure where to begin looking, or how to go about such a setup where 3 servers are all identical, but perhaps one acts as the main load balancer?? If someone can point me in the right direction, or if this simply sounds like one of those Enterprise Cloud's that is now a default setup in Ubuntu Server 9.10+, then I'll go down that route. Cheers in advance. Andy

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  • Issues with creating a snapshot

    - by Andy Welcomer
    Hello everyone, We have a strange issue when attempting to create a snapshot in one of our regional environments. We have 4 VMs, 2 of them have mulitple VMDKs spread onto different datastores. When a snapshot is created, all the VMDKs (except for the first), seem to vanish. If you look at the properties of the VM, the path to the VMDKS points to the datastore where the primary VMDK is, and the file name is some random garbage. If the snapshot is deleted everything returns to normal. Has anyone ever seen this? I'm using ESX3.5 Thank you in advance. Andy ==============UPDATE============== Here is some more information. I just created a test machine with 7 VMDKs. 1 for the OS. and 6 others for data. All of the VMDKs are in seperate datastores. I take a snapshot of the machine, all of the 6 VMDKs loose their reference to the actual VMDK files. The all point to 64KB VMDK files in the datastore where the OS VMDK is located. These 64KB vmdks didn't exist until the snapshot was taken. When the snapshot is deleted, everything goes back to normal.

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  • Kickstart CentOS 6 prompting for TCP/IP with network set to DHCP

    - by Andy Shinn
    I am trying to stop my kickstart CentOS install prompting me for TCP/IP information. After I click through this prompt (keeping IPv4 and IPv6 to their defaults) the installation continues and completes just fine. Below is my kickstart file: # Andy's super awesome VM kickstart file install url --url=http://mirrors.kernel.org/centos/6/os/x86_64 lang en_US.UTF-8 keyboard us text %include /tmp/network.ks rootpw --iscrypted $6$RA8DyrNTsVJkGIgY$ohZ62HHiOjNnn1yDMZlIu3lQ63D3plGPcbVZtPKE8Oq6Z.IGUgN.kNLkxs/ZymZuluRDWsW2eey5zLOl2G3mp. firewall --service=ssh authconfig --enableshadow --passalgo=sha512 selinux --disabled timezone America/Los_Angeles bootloader --location=mbr --driveorder=vda --append="crashkernel=auto rhgb quiet" # The following is the partition information you requested # Note that any partitions you deleted are not expressed # here so unless you clear all partitions first, this is # not guaranteed to work zerombr clearpart --all --drives=vda --initlabel part /boot --fstype=ext4 --size=500 part pv.253002 --grow --size=1 volgroup vg1 --pesize=4096 pv.253002 logvol / --fstype=ext4 --name=lv_root --vgname=vg1 --grow --size=1024 --maxsize=51200 logvol swap --name=lv_swap --vgname=vg1 --grow --size=4032 --maxsize=4032 repo --name="CentOS" --baseurl=http://mirrors.kernel.org/centos/6/os/x86_64 --cost=100 repo --name="Puppet Labs Products" --baseurl=http://yum.puppetlabs.com/el/6/products/x86_64 repo --name="Puppet Labs Dependencies" --baseurl=http://yum.puppetlabs.com/el/6/dependencies/x86_64 repo --name="EyeFi" --baseurl=http://flexo.eye.fi/6/eye-fi-api %packages @core @server-policy puppet facter %end %pre --erroronfail #!/bin/bash for x in `cat /proc/cmdline`; do case $x in SERVERNAME*) eval $x echo "network --onboot yes --device eth0 --bootproto dhcp --hostname ${SERVERNAME}.eye.fi" /tmp/network.ks ;; esac; done %end %post puppet agent --waitforcert 10 --onetime --no-daemon --pluginsync --server puppet.eye.fi %end reboot My kernel arguments are in this following virt-install command that I use to start the install: virt-install -n zabbix -r 2048 --vcpus=2 -l http://mirrors.kernel.org/centos/6/os/x86_64 --disk /dev/vg_inf1/zabbix --network bridge=br85 --initrd-inject=/home/ashinn/vm_kickstart --extra-args "ks=file:/vm_kickstart SERVERNAME=zabbix" --autostart During the install, I can pull up a console on the second terminal and verify the contents of /tmp/network.ks are: network --onboot=yes --bootproto=dhcp --ipv6=auto --hostname=jenkins2.mydomain.com Why might Anaconda be prompting for the TCP/IP settings when they are already set to DHCP?

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  • Are my Linux symbolic links acting correctly?

    - by Andy Castles
    Hi all I've been using Linux on and off for the last 15 years and today I came across something in bash that surprised me. Setup the following directory structure: $ cd /tmp $ mkdir /tmp/symlinktest $ mkdir /tmp/symlinktest/dir $ mkdir /tmp/symlinktarget Now create two sym links in symlinktest pointing to symlinktarget: $ cd /tmp/symlinktest $ ln -s ../symlinktarget Asym $ ln -s ../symlinktarget Bsym Now, in bash, the following tab completion does strange things. Type the following: $ cd dir $ cd ../A[TAB] Pressing the tab key above completes the line to: $ cd ../Asym/ as I expected. Now press enter to change into Asym and type: $ cd ../B[TAB] This time pressing the tab key completes the link to: $ cd ../Bsym[space] Note that there is now a space after the Bsym and there is no trailing slash. My question is, why when changing from the physical directory "dir" to Asym it recognises that Asym is a link to a directory, but when changing from one sym link to another, it doesn't recognise that it's a link to a directory? In addition, if I try to create a new file within Asym, I get an error message: $ cd /tmp/symlinktest/Asym $ cat hello > ../Bsym/file.txt -bash: ../Bsym/file.txt: No such file or directory I always thought that symlinks were mostly transparent except to programs that need to manipulate them. Is this normal behaviour? Many thanks, Andy

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  • Walk me through the Linux log files (please)

    - by Andy
    Hey all, I just tried loading a 2MB file in gedit and it silently died on me. I was wondering if anything might appear in a log file that might help me diagnose this: I checked syslog and found out it segfaulted. While doing this I realised that I don't really know anything about how logging is organised on *nix machines. All I know at the mo is Logs are typically stored in /var/log/... is there anywhere else that I should know about? I'm familiar with application specific logs, such as apache's. I understand that dmesg is the bootup log, and syslog is a general system log... is that right? So would someone mind taking me through the most useful logs? Are the two logs I mention in the final point the only general logs? And what are the funky numbers at the start of lines in dmesg? Seconds since startup? Please include anything in your answers that you think would improve my understanding here and help me track down anomalies! TIA Andy

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  • Ask the Readers: Backing Your Files Up – Local Storage versus the Cloud

    - by Asian Angel
    Backing up important files is something that all of us should do on a regular basis, but may not have given as much thought to as we should. This week we would like to know if you use local storage, cloud storage, or a combination of both to back your files up. Photo by camknows. For some people local storage media may be the most convenient and/or affordable way to back up their files. Having those files stored on media under your control can also provide a sense of security and peace of mind. But storing your files locally may also have drawbacks if something happens to your storage media. So how do you know whether the benefits outweigh the disadvantages or not? Here are some possible pros and cons that may affect your decision to use local storage to back up your files: Local Storage Pros You are in control of your data Your files are portable and can go with you when needed if using external or flash drives Files are accessible without an internet connection You can easily add more storage capacity as needed (additional drives, etc.) Cons You need to arrange room for your storage media (if you have multiple externals drives, etc.) Possible hardware failure No access to your files if you forget to bring your storage media with you or it is too bulky to bring along Theft and/or loss of home with all contents due to circumstances like fire If you are someone who is always on the go and needs to travel as lightly as possible, cloud storage may be the perfect way for you to back up and access your files. Perhaps your laptop has a hard-drive failure or gets stolen…unhappy events to be sure, but you will still have a copy of your files available. Perhaps a company wants to make sure their records, files, and other information are backed up off site in case of a major hardware or system failure…expensive and/or frustrating to fix if it happens, but once again there is a nice backup ready to go once things are fixed. As with local storage, here are some possible pros and cons that may influence your choice of cloud storage to back up your files: Cloud Storage Pros No need to carry around flash or bulky external drives All of your files are accessible wherever there is an internet connection No need to deal with local storage media (or its’ upkeep) Your files are still safe if your home is broken into or other unfortunate circumstances occur Cons Your files and data are not 100% under your control Possible hardware failure or loss of files on the part of your cloud storage provider (this could include a disgruntled employee wreaking havoc) No access to your files if you do not have an internet connection The cloud storage provider may eventually shutdown due to financial hardship or other unforeseen circumstances The possibility of your files and data being stolen by hackers due to a security breach on the part of your cloud storage provider You may also prefer to try and cover all of the possibilities by using both local and cloud storage to back up your files. If something happens to one, you always have the other to fall back on. Need access to those files at or away from home? As long as you have access to either your storage media or an internet connection, you are good to go. Maybe you are getting ready to choose a backup solution but are not sure which one would work better for you. Here is your chance to ask your fellow HTG readers which one they would recommend. Got a great backup solution already in place? Then be sure to share it with your fellow readers! How-To Geek Polls require Javascript. Please Click Here to View the Poll. Latest Features How-To Geek ETC The 20 Best How-To Geek Explainer Topics for 2010 How to Disable Caps Lock Key in Windows 7 or Vista How to Use the Avira Rescue CD to Clean Your Infected PC The Complete List of iPad Tips, Tricks, and Tutorials Is Your Desktop Printer More Expensive Than Printing Services? 20 OS X Keyboard Shortcuts You Might Not Know Winter Sunset by a Mountain Stream Wallpaper Add Sleek Style to Your Desktop with the Aston Martin Theme for Windows 7 Awesome WebGL Demo – Flight of the Navigator from Mozilla Sunrise on the Alien Desert Planet Wallpaper Add Falling Snow to Webpages with the Snowfall Extension for Opera [Browser Fun] Automatically Keep Up With the Latest Releases from Mozilla Labs in Firefox 4.0

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  • Cloud Adoption Challenges

    - by Herve Roggero
    Originally posted on: http://geekswithblogs.net/hroggero/archive/2013/11/07/cloud-adoption-challenges.aspxWhile cloud computing makes sense for most organizations and countless projects, I have seen customers significantly struggle with cloud adoption challenges. This blog post is not an attempt to provide a generic assessment of cloud adoption; rather it is an account of personal experiences in the field, some of which may or may not apply to your organization. Cloud First, Burst? In the rush to cloud adoption some companies have made the decision to redesign their core system with a cloud first approach. However a cloud first approach means that the system may not work anymore on-premises after it has been redesigned, specifically if the system depends on Platform as a Service (PaaS) components (such as Azure Tables). While PaaS makes sense when your company is in a position to adopt the cloud exclusively, it can be difficult to leverage with systems that need to work in different clouds or on-premises. As a result, some companies are starting to rethink their cloud strategy by designing for on-premises first, and modify only the necessary components to burst when needed in the cloud. This generally means that the components need to work equally well in any environment, which requires leveraging Infrastructure as a Service (IaaS) or additional investments for PaaS applications, or both.  What’s the Problem? Although most companies can benefit from cloud computing, not all of them can clearly identify a business reason for doing so other than in very generic terms. I heard many companies claim “it’s cheaper”, or “it allows us to scale”, without any specific metric or clear strategy behind the adoption decision. Other companies have a very clear strategy behind cloud adoption and can precisely articulate business benefits, such as “we have a 500% increase in traffic twice a year, so we need to burst in the cloud to avoid doubling our network and server capacity”. Understanding the problem being solved through by adopting cloud computing can significantly help organizations determine the optimum path and timeline to adoption. Performance or Scalability? I stopped counting the number of times I heard “the cloud doesn’t scale; our database runs faster on a laptop”.  While performance and scalability are related concepts, they are nonetheless different in nature. Performance is a measure of response time under a given load (meaning with a specific number of users), while scalability is the performance curve over various loads. For example one system could see great performance with 100 users, but timeout with 1,000 users, in which case the system wouldn’t scale. However another system could have average performance with 100 users, but display the exact same performance with 1,000,000 users, in which case the system would scale. Understanding that cloud computing does not usually provide high performance, but instead provides the tools necessary to build a scalable system (usually using PaaS services such as queuing and data federation), is fundamental to proper cloud adoption. Uptime? Last but not least, you may want to read the Service Level Agreement of your cloud provider in detail if you haven’t done so. If you are expecting 99.99% uptime annually you may be in for a surprise. Depending on the component being used, there may be no associated SLA at all! Other components may be restarted at any time, or services may experience failover conditions weekly ( or more) based on current overall conditions of the cloud service provider, most of which are outside of your control. As a result, for PaaS cloud environments (and to a certain extent some IaaS systems), applications need to assume failure and gracefully retry to be successful in the cloud in order to provide service continuity to end users. About Herve Roggero Herve Roggero, Windows Azure MVP, is the founder of Blue Syntax Consulting (http://www.bluesyntax.net). Herve's experience includes software development, architecture, database administration and senior management with both global corporations and startup companies. Herve holds multiple certifications, including an MCDBA, MCSE, MCSD. He also holds a Master's degree in Business Administration from Indiana University. Herve is the co-author of "PRO SQL Azure" and “PRO SQL Server 2012 Practices” from Apress, a PluralSight author, and runs the Azure Florida Association.

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  • Take Advantage of Oracle's Ongoing Assurance Effort!

    - by eric.maurice
    Hi, this is Eric Maurice again! A few years ago, I posted a blog entry, which discussed the psychology of patching. The point of this blog entry was that a natural tendency existed for systems and database administrators to be reluctant to apply patches, even security patches, because of the fear of "breaking" the system. Unfortunately, this belief in the principle "if it ain't broke, don't fix it!" creates significant risks for organizations. Running systems without applying the proper security patches can greatly compromise the security posture of the organization because the security controls available in the affected system may be compromised as a result of the existence of the unfixed vulnerabilities. As a result, Oracle continues to strongly recommend that customers apply all security fixes as soon as possible. Most recently, I have had a number of conversations with customers who questioned the need to upgrade their highly stable but otherwise unsupported Oracle systems. These customers wanted to know more about the kind of security risks they were exposed to, by running obsolete versions of Oracle software. As per Oracle Support Policies, Critical Patch Updates are produced for currently supported products. In other words, Critical Patch Updates are not created by Oracle for product versions that are no longer covered under the Premier Support or Extended Support phases of the Lifetime Support Policy. One statement used in each Critical Patch Update Advisory is particularly important: "We recommend that customers upgrade to a supported version of Oracle products in order to obtain patches. Unsupported products, releases and versions are not tested for the presence of vulnerabilities addressed by this Critical Patch Update. However, it is likely that earlier versions of affected releases are also affected by these vulnerabilities." The purpose of this warning is to inform Oracle customers that a number of the vulnerabilities fixed in each Critical Patch Update may affect older versions of a specific product line. In other words, each Critical Patch Update provides a number of fixes for currently supported versions of a given product line (this information is listed for each bug in the Risk Matrices of the Critical Patch Update Advisory), but the unsupported versions in the same product line, while they may be affected by the vulnerabilities, will not receive the fixes, and are therefore vulnerable to attacks. The risk assumed by organizations wishing to remain on unsupported versions is amplified by the behavior of malicious hackers, who typically will attempt to, and sometimes succeed in, reverse-engineering the content of vendors' security fixes. As a result, it is not uncommon for exploits to be published soon after Oracle discloses vulnerabilities with the release of a Critical Patch Update or Security Alert. Let's consider now the nature of the vulnerabilities that may exist in obsolete versions of Oracle software. A number of severe vulnerabilities have been fixed by Oracle over the years. While Oracle does not test unsupported products, releases and versions for the presence of vulnerabilities addressed by each Critical Patch Update, it should be assumed that a number of the vulnerabilities fixed with the Critical Patch Update program do exist in unsupported versions (regardless of the product considered). The most severe vulnerabilities fixed in past Critical Patch Updates may result in full compromise of the targeted systems, down to the OS level, by remote and unauthenticated users (these vulnerabilities receive a CVSS Base Score of 10.0) or almost as critically, may result in the compromise of the affected systems (without compromising the underlying OS) by a remote and unauthenticated users (these vulnerabilities receive a CVSS Base Score of 7.5). Such vulnerabilities may result in complete takeover of the targeted machine (for the CVSS 10.0), or may result in allowing the attacker the ability to create a denial of service against the affected system or even hijacking or stealing all the data hosted by the compromised system (for the CVSS 7.5). The bottom line is that organizations should assume the worst case: that the most critical vulnerabilities are present in their unsupported version; therefore, it is Oracle's recommendation that all organizations move to supported systems and apply security patches in a timely fashion. Organizations that currently run supported versions but may be late in their security patch release level can quickly catch up because most Critical Patch Updates are cumulative. With a few exceptions noted in Oracle's Critical Patch Update Advisory, the application of the most recent Critical Patch Update will bring these products to current security patch level and provide the organization with the best possible security posture for their patch level. Furthermore, organizations are encouraged to upgrade to most recent versions as this will greatly improve their security posture. At Oracle, our security fixing policies state that security fixes are produced for the main code line first, and as a result, our products benefit from the mistakes made in previous version(s). Our ongoing assurance effort ensures that we work diligently to fix the vulnerabilities we find, and aim at constantly improving the security posture our products provide by default. Patch sets include numerous in-depth fixes in addition to those delivered through the Critical Patch Update and, in certain instances, important security fixes require major architectural changes that can only be included in new product releases (and cannot be backported through the Critical Patch Update program). For More Information: • Mary Ann Davidson is giving a webcast interview on Oracle Software Security Assurance on February 24th. The registration link for attending this webcast is located at http://event.on24.com/r.htm?e=280304&s=1&k=6A7152F62313CA09F77EBCEEA9B6294F&partnerref=EricMblog • A blog entry discussing Oracle's practices for ensuring the quality of Critical patch Updates can be found at http://blogs.oracle.com/security/2009/07/ensuring_critical_patch_update_quality.html • The blog entry "To patch or not to patch" is located at http://blogs.oracle.com/security/2008/01/to_patch_or_not_to_patch.html • Oracle's Support Policies are located at http://www.oracle.com/us/support/policies/index.html • The Critical Patch Update & Security Alert page is located at http://www.oracle.com/technetwork/topics/security/alerts-086861.html

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  • Cloud to On-Premise Connectivity Patterns

    - by Rajesh Raheja
    Do you have a requirement to convert an Opportunity in Salesforce.com to an Order/Quote in Oracle E-Business Suite? Or maybe you want the creation of an Oracle RightNow Incident to trigger an on-premise Oracle E-Business Suite Service Request creation for RMA and Field Scheduling? If so, read on. In a previous blog post, I discussed integrating TO cloud applications, however the use cases above are the reverse i.e. receiving data FROM cloud applications (SaaS) TO on-premise applications/databases that sit behind a firewall. Oracle SOA Suite is assumed to be on-premise with with Oracle Service Bus as the mediation and virtualization layer. The main considerations for the patterns are are security i.e. shielding enterprise resources; and scalability i.e. minimizing firewall latency. Let me use an analogy to help visualize the patterns: the on-premise system is your home - with your most valuable possessions - and the SaaS app is your favorite on-line store which regularly ships (inbound calls) various types of parcels/items (message types/service operations). You need the items at home (on-premise) but want to safe guard against misguided elements of society (internet threats) who may masquerade as postal workers and vandalize property (denial of service?). Let's look at the patterns. Pattern: Pull from Cloud The on-premise system polls from the SaaS apps and picks up the message instead of having it delivered. This may be done using Oracle RightNow Object Query Language or SOAP APIs. This is particularly suited for certain integration approaches wherein messages are trickling in, can be centralized and batched e.g. retrieving event notifications on an hourly schedule from the Oracle Messaging Service. To compare this pattern with the home analogy, you are avoiding any deliveries to your home and instead go to the post office/UPS/Fedex store to pick up your parcel. Every time. Pros: On-premise assets not exposed to the Internet, firewall issues avoided by only initiating outbound connections Cons: Polling mechanisms may affect performance, may not satisfy near real-time requirements Pattern: Open Firewall Ports The on-premise system exposes the web services that needs to be invoked by the cloud application. This requires opening up firewall ports, routing calls to the appropriate internal services behind the firewall. Fusion Applications uses this pattern, and auto-provisions the services on the various virtual hosts to secure the topology. This works well for service integration, but may not suffice for large volume data integration. Using the home analogy, you have now decided to receive parcels instead of going to the post office every time. A door mail slot cut out allows the postman can drop small parcels, but there is still concern about cutting new holes for larger packages. Pros: optimal pattern for near real-time needs, simpler administration once the service is provisioned Cons: Needs firewall ports to be opened up for new services, may not suffice for batch integration requiring direct database access Pattern: Virtual Private Networking The on-premise network is "extended" to the cloud (or an intermediary on-demand / managed service offering) using Virtual Private Networking (VPN) so that messages are delivered to the on-premise system in a trusted channel. Using the home analogy, you entrust a set of keys with a neighbor or property manager who receives the packages, and then drops it inside your home. Pros: Individual firewall ports don't need to be opened, more suited for high scalability needs, can support large volume data integration, easier management of one connection vs a multitude of open ports Cons: VPN setup, specific hardware support, requires cloud provider to support virtual private computing Pattern: Reverse Proxy / API Gateway The on-premise system uses a reverse proxy "API gateway" software on the DMZ to receive messages. The reverse proxy can be implemented using various mechanisms e.g. Oracle API Gateway provides firewall and proxy services along with comprehensive security, auditing, throttling benefits. If a firewall already exists, then Oracle Service Bus or Oracle HTTP Server virtual hosts can provide reverse proxy implementations on the DMZ. Custom built implementations are also possible if specific functionality (such as message store-n-forward) is needed. In the home analogy, this pattern sits in between cutting mail slots and handing over keys. Instead, you install (and maintain) a mailbox in your home premises outside your door. The post office delivers the parcels in your mailbox, from where you can securely retrieve it. Pros: Very secure, very flexible Cons: Introduces a new software component, needs DMZ deployment and management Pattern: On-Premise Agent (Tunneling) A light weight "agent" software sits behind the firewall and initiates the communication with the cloud, thereby avoiding firewall issues. It then maintains a bi-directional connection either with pull or push based approaches using (or abusing, depending on your viewpoint) the HTTP protocol. Programming protocols such as Comet, WebSockets, HTTP CONNECT, HTTP SSH Tunneling etc. are possible implementation options. In the home analogy, a resident receives the parcel from the postal worker by opening the door, however you still take precautions with chain locks and package inspections. Pros: Light weight software, IT doesn't need to setup anything Cons: May bypass critical firewall checks e.g. virus scans, separate software download, proliferation of non-IT managed software Conclusion The patterns above are some of the most commonly encountered ones for cloud to on-premise integration. Selecting the right pattern for your project involves looking at your scalability needs, security restrictions, sync vs asynchronous implementation, near real-time vs batch expectations, cloud provider capabilities, budget, and more. In some cases, the basic "Pull from Cloud" may be acceptable, whereas in others, an extensive VPN topology may be well justified. For more details on the Oracle cloud integration strategy, download this white paper.

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  • Cloud to On-Premise Connectivity Patterns

    - by Rajesh Raheja
    Do you have a requirement to convert an Opportunity in Salesforce.com to an Order/Quote in Oracle E-Business Suite? Or maybe you want the creation of an Oracle RightNow Incident to trigger an on-premise Oracle E-Business Suite Service Request creation for RMA and Field Scheduling? If so, read on. In a previous blog post, I discussed integrating TO cloud applications, however the use cases above are the reverse i.e. receiving data FROM cloud applications (SaaS) TO on-premise applications/databases that sit behind a firewall. Oracle SOA Suite is assumed to be on-premise with with Oracle Service Bus as the mediation and virtualization layer. The main considerations for the patterns are are security i.e. shielding enterprise resources; and scalability i.e. minimizing firewall latency. Let me use an analogy to help visualize the patterns: the on-premise system is your home - with your most valuable possessions - and the SaaS app is your favorite on-line store which regularly ships (inbound calls) various types of parcels/items (message types/service operations). You need the items at home (on-premise) but want to safe guard against misguided elements of society (internet threats) who may masquerade as postal workers and vandalize property (denial of service?). Let's look at the patterns. Pattern: Pull from Cloud The on-premise system polls from the SaaS apps and picks up the message instead of having it delivered. This may be done using Oracle RightNow Object Query Language or SOAP APIs. This is particularly suited for certain integration approaches wherein messages are trickling in, can be centralized and batched e.g. retrieving event notifications on an hourly schedule from the Oracle Messaging Service. To compare this pattern with the home analogy, you are avoiding any deliveries to your home and instead go to the post office/UPS/Fedex store to pick up your parcel. Every time. Pros: On-premise assets not exposed to the Internet, firewall issues avoided by only initiating outbound connections Cons: Polling mechanisms may affect performance, may not satisfy near real-time requirements Pattern: Open Firewall Ports The on-premise system exposes the web services that needs to be invoked by the cloud application. This requires opening up firewall ports, routing calls to the appropriate internal services behind the firewall. Fusion Applications uses this pattern, and auto-provisions the services on the various virtual hosts to secure the topology. This works well for service integration, but may not suffice for large volume data integration. Using the home analogy, you have now decided to receive parcels instead of going to the post office every time. A door mail slot cut out allows the postman can drop small parcels, but there is still concern about cutting new holes for larger packages. Pros: optimal pattern for near real-time needs, simpler administration once the service is provisioned Cons: Needs firewall ports to be opened up for new services, may not suffice for batch integration requiring direct database access Pattern: Virtual Private Networking The on-premise network is "extended" to the cloud (or an intermediary on-demand / managed service offering) using Virtual Private Networking (VPN) so that messages are delivered to the on-premise system in a trusted channel. Using the home analogy, you entrust a set of keys with a neighbor or property manager who receives the packages, and then drops it inside your home. Pros: Individual firewall ports don't need to be opened, more suited for high scalability needs, can support large volume data integration, easier management of one connection vs a multitude of open ports Cons: VPN setup, specific hardware support, requires cloud provider to support virtual private computing Pattern: Reverse Proxy / API Gateway The on-premise system uses a reverse proxy "API gateway" software on the DMZ to receive messages. The reverse proxy can be implemented using various mechanisms e.g. Oracle API Gateway provides firewall and proxy services along with comprehensive security, auditing, throttling benefits. If a firewall already exists, then Oracle Service Bus or Oracle HTTP Server virtual hosts can provide reverse proxy implementations on the DMZ. Custom built implementations are also possible if specific functionality (such as message store-n-forward) is needed. In the home analogy, this pattern sits in between cutting mail slots and handing over keys. Instead, you install (and maintain) a mailbox in your home premises outside your door. The post office delivers the parcels in your mailbox, from where you can securely retrieve it. Pros: Very secure, very flexible Cons: Introduces a new software component, needs DMZ deployment and management Pattern: On-Premise Agent (Tunneling) A light weight "agent" software sits behind the firewall and initiates the communication with the cloud, thereby avoiding firewall issues. It then maintains a bi-directional connection either with pull or push based approaches using (or abusing, depending on your viewpoint) the HTTP protocol. Programming protocols such as Comet, WebSockets, HTTP CONNECT, HTTP SSH Tunneling etc. are possible implementation options. In the home analogy, a resident receives the parcel from the postal worker by opening the door, however you still take precautions with chain locks and package inspections. Pros: Light weight software, IT doesn't need to setup anything Cons: May bypass critical firewall checks e.g. virus scans, separate software download, proliferation of non-IT managed software Conclusion The patterns above are some of the most commonly encountered ones for cloud to on-premise integration. Selecting the right pattern for your project involves looking at your scalability needs, security restrictions, sync vs asynchronous implementation, near real-time vs batch expectations, cloud provider capabilities, budget, and more. In some cases, the basic "Pull from Cloud" may be acceptable, whereas in others, an extensive VPN topology may be well justified. For more details on the Oracle cloud integration strategy, download this white paper.

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