Search Results

Search found 4217 results on 169 pages for 'central administration'.

Page 151/169 | < Previous Page | 147 148 149 150 151 152 153 154 155 156 157 158  | Next Page >

• Windows XP long login (15 minutes +)

  - by Emily Pinkerton

  I'm having a lot of issues with our Windows XP SP3 machines (about 5, but every week another gets on the bandwagon of this issue). They take forever (15 minutes) to apply the user settings once our employee's enter their username and password to login to our domain. It only happens say if a user has reboot the machine and then when they go to log back in then it hangs forever. Reboot and restart are the key words for sure I've noticed with this issue. Here are things I have tested: •Made sure the DNS was set to point to our two servers (Server01 & Server02 are DNS Domain Controllers, 01 is primary and 02 backup). •No major changes have been applied to our network. •All profiles are local, so I have deleted out local profiles that aren't being used on those machines that run slow. •Also I have tried to enable and disable the Enable Fast Login under the local machines GP. It was not configured originally and when I tested both, it made the computer hang on "applying computer settings" for about 15 minutes. When it finally came up to the login screen the it was very quick to login to the domain. However this doesn't fix my issue, and even more frustrating upon setting it back to being not configured it now still takes for forever to apply computer settings. •I enabled the userenv log and here is what I see, but my experience is limited and I'm not sure how to read it exactly. (see below for log, this isn't the whole thing because it's really long) USERENV(2ec.2f0) 10:50:41:843 LoadUserProfile: LoadUserProfileP succeeded USERENV(2ec.2f0) 10:50:41:843 LoadUserProfile: Returning success. Final Information follows: USERENV(2ec.2f0) 10:50:41:843 lpProfileInfo-UserName = USERENV(2ec.2f0) 10:50:41:843 lpProfileInfo-lpProfilePath = < USERENV(2ec.2f0) 10:50:41:843 lpProfileInfo-dwFlags = 0x0 USERENV(2ec.2f0) 10:50:41:843 LoadUserProfile: Returning TRUE. hProfile = <0x818 USERENV(2ec.2f0) 10:50:41:984 IsSyncForegroundPolicyRefresh: Synchronous, Reason:NonCachedCredentials USERENV(2ec.248) 10:50:41:984 IsSyncForegroundPolicyRefresh: Synchronous, Reason:NonCachedCredentials USERENV(3c4.3dc) 10:51:26:166 LibMain: Process Name: C:\WINDOWS\system\wbem\wmiprvse.exe USERENV(2ec.5cc) 11:05:08:741 ProcessGPOs: network name is 192.168.49.0 USERENV(4a8.888) 11:05:08:804 GetProfileType: Profile already loaded. USERENV(4a8.888) 11:05:08:804 LoadProfileInfo: Failed to query central profile with error 2 USERENV(4a8.888) 11:05:08:804 GetProfileType: ProfileFlags is 0 Also this error is in the file quite a lot: USERENV(328.5bc) 11:05:29:733 GetUserDNSDomainName: Failed to impersonate user USERENV(328.834) 11:05:29:733 ImpersonateUser: Failed to impersonate user with 5. I'm really not sure what else to do with my limited experience, but I'm hoping someone can help me. I feel like I'm dealing with an issue way above my level and any knowledge I can gain out of getting this issue fixed would be amazing.

  Read the article

• XP OEM licensing when reinstalling Windows XP

  - by mindas

  My wife has managed to buy a Dell laptop she was using at her ex-employer that just went bust. The problem with it is the OS (Windows XP) which takes ages to boot and is generally disproportionally slow to the hardware of the machine. So my aim is to sacrifice a day and reinstall it. The problem I am slightly worried about is the licensing/registration/activation hell. Apart from the sticker (with WinXP license key), the laptop has no other paperwork proving this license is legitimate. I believe this was originally an OEM license. Unfortunately, I don't have the the installation CD. This computer also has MS Office installed (which I would like to retain) but it none of MS Office apps would launch due to some obscure error complaining about lack of free disk space (which computer has plenty of). I have absolutely no clue what kind of license this MS Office was. And because the company has gone into the administration, there is no way of getting this information nor installable media. I believe that by buying the hardware I have also acquired the software which I can use as I see fit. Correct me if I'm wrong. Above said, my question would be: What is the easiest way of reinstalling the XP? By easiest I mean avoiding spending my time to prove Microsoft support I've got the right to use the software (insert your computer says noooo joke here) but still being able to get to fresh virgin activated legal state of the XP. I used to work as a sysadmin many years ago so I am not afraid of any technical difficulties. The same question applies to MS Office. I imagine the process would consist of backing up all the data, pulling some bits from the registry and using that on the fresh install. As for reinstall I'd expect to use some sort of OEM Windows repair CD from Dell, right? Are those freely available? My other box (HP) has such a thing and it can't be used on any other brand. I'm sure somebody had to go through this licensing hell and could share his/her tips. Thanks in advance.

  Read the article

• How can I centralise MySQL data between 3 or more geographically separate servers?

  - by Andy Castles

  To explain the background to the question: We have a home-grown PHP application (for running online language-learning courses) running on a Linux server and using MySQL on localhost for saving user data (e.g. results of tests taken, marks of submitted work, time spent on different pages in the courses, etc). As we have students from different geographic locations we currently have 3 virtual servers hosted close to those locations (Spain, UK and Hong Kong) and users are added to the server closest to them (they access via different URLs, e.g. europe.domain.com, uk.domain.com and asia.domain.com). This works but is an administrative nightmare as we have to remember which server a particular user is on, and users can only connect to one server. We would like to somehow centralise the information so that all users are visible on any of the servers and users could connect to any of the 3 servers. The question is, what method should we use to implement this. It must be an issue that that lots of people have encountered but I haven't found anything conclusive after a fair bit of Googling around. The closest I have seen to solutions are: something like master-master replication, but I have read so many posts suggesting that this is not a good idea as things like auto_increment fields can break. circular replication, this sounded perfect but to quote from O'Reilly's High Performance MySQL, "In general, rings are brittle and best avoided" We're not against rewriting code in the application to make it work with whatever solution is required but I am not sure if replication is the correct thing to use. Thanks, Andy P.S. I should add that we experimented with writes to a central database and then using reads from a local database but the response time between the different servers for writing was pretty bad and it's also important that written data is available immediately for reading so if replication is too slow this could cause out-of-date data to be returned. Edit: I have been thinking about writing my own rudimentary replication script which would involve something like having each user given a server ID to say which is his "home server", e.g. users in asia would be marked as having the Hong Kong server as their own server. Then the replication scripts (which would be a PHP script set to run as a cron job reasonably frequently, e.g. every 15 minutes or so) would run independently on each of the servers in the system. They would go through the database and distribute any information about users with the "home server" set to the server that the script is running on to all of the other databases in the system. They would also need to suck new information which has been added to any of the other databases on the system where the "home server" flag is the server where the script is running. I would need to work out the details and build in the logic to deal with conflicts but I think it would be possible, however I wanted to make sure that there is not a correct solution for this already out there as it seems like it must be a problem that many people have already come across.

  Read the article

• How can I prevent an unintentional DDOS running ColdFusion 8 with IIS 6?

  - by Eric Belair

  We had an interesting outage today on one of our client's websites. Out of nowhere, the website was inaccessible. The website runs by itself on a dedicated physical Windows 2000 server (probably overkill, I know, but that's a discussion for a different day). After restarting IIS and ColdFusion Application Service, the problem came back several times. My initial thought was that it was a DNS issue, which happens occasionally - the last time it happened was after Hurricane Sandy when we our ISP was out, and we had to make some network config changes. But, it was not a DNS issue. My second thought was that it was a DDOS attack, but, there's very little reason anyone would want to take this site down. When we called our ISP, the operator on the other end noted that traffic was spiking significantly. As it turned out, the client had unintentionally caused a DDOS on the website, after they FTPed a very large video file, and then mass emailed a link to it. Hundreds of people clicked the link and brought the site to its knees. I am primarily a Website Programmer, but I often have to contribute to server administration at times. Sadly, I'm the resident ColdFusion and IIS expert, but I don't have a lot of experience with this issue. What are some basic steps that I can take to prevent this from happening in the future, since we cannot always control what files the client posts to the website. Here are some ideas I had, but I'm unsure of the impact: Limit the number of connections in IIS. Put media files on a separate server (like an Amazon site, etc.). File requests of this type currently behind a server-script (i.e. /www.site.com/viewFile.cfm?fileId=1424545, where the fileId references a file off the webroot) that logs requests, and pushes the file to the browser using CFCONTENT. I could edit this script to reject requests when they exceed a certain amount in a given time-frame (i.e. a 5MB can be accessed globally 10 times in an hour). This may cause some users frustration, but, if hundreds of users are attempting to view the file, the site is going to crash anyways, as it did today, which is way more frustrating, since there is no "pretty" message explaining why they can't get to the file. I'm open to any suggestions, as I'm continuing my research to report to the CTO with the best options, so that we can put a solution into effect. Thank you.

  Read the article

• Why can't I use SSL certs imported via Server Admin in a custom Apache install?

  - by morgant

  I've got a couple of Mac OS X 10.6.8 Server web servers that run a custom AMP255 (Apache 2.x, MySQL 5.x, and PHP 5.x) stack installed using MacPorts. We've got a lot of Mac OS X Server servers and generally install SSL certs via Server Admin and they "just work" in the built-in services, however, these web servers have always had SSL certs installed in a non-standard location and used only for Apache. Long story short, we're trying to standardize this part of our administration and install certs via Server Admin, but have run into the following issue: when the certs are installed via Server Admin and referenced in our Apache conf files, Apache then prompts for a password upon trying to start. It does not seem to be any password we know, certainly not the admin or keychain passwords! We've added the _www user to the certusers (mainly just to ensure they have the proper access to the private key in /etc/certificates/). So, with the custom installed certs we have the following files (basically just pasted in from the company we purchase our certs from): -rw-r--r-- 1 root admin 1395 Apr 10 11:22 *.domain.tld.ca -rw-r--r-- 1 root admin 1656 Apr 10 11:21 *.domain.tld.cert -rw-r--r-- 1 root admin 1680 Apr 10 11:22 *.domain.tld.key And the following in the VirtualHost in /opt/local/apache2/conf/extra/httpd-ssl.conf: SSLCertificateFile /path/to/certs/*.domain.tld.cert SSLCertificateKeyFile /path/to/certs/*.domain.tld.key SSLCACertificateFile /path/to/certs/*.domain.tld.ca This setup functions normally. If we use the certs installed via Server Admin, which both Server Admin & Keychain Assistant show as valid, they're installed in /etc/certificates/ as follows: -rw-r--r-- 1 root wheel 1655 Apr 9 13:44 *.domain.tld.SOMELONGHASH.cert.pem -rw-r--r-- 1 root wheel 4266 Apr 9 13:44 *.domain.tld.SOMELONGHASH.chain.pem -rw-r----- 1 root certusers 3406 Apr 9 13:44 *.domain.tld.SOMELONGHASH.concat.pem -rw-r----- 1 root certusers 1751 Apr 9 13:44 *.domain.tld.SOMELONGHASH.key.pem And if we replace the aforementioned lines in our httpd-ssl.conf with the following: SSLCertificateFile /etc/certificates/*.domain.tld.SOMELONGHASH.cert.pem SSLCertificateKeyFile /etc/certificates/*.domain.tld.SOMELONGHASH.key.pem SSLCertificateChainFile /etc/certificates/*.domain.tld.SOMELONGHASH.chain.pem This prompts for the unknown password. I have also tried httpd-ssl.conf configured as follows: SSLCertificateFile /etc/certificates/*.domain.tld.SOMELONGHASH.cert.pem SSLCertificateKeyFile /etc/certificates/*.domain.tld.SOMELONGHASH.key.pem SSLCertificateChainFile /etc/certificates/*.domain.tld.SOMELONGHASH.concat.pem And as: SSLCertificateFile /etc/certificates/*.domain.tld.SOMELONGHASH.cert.pem SSLCertificateKeyFile /etc/certificates/*.domain.tld.SOMELONGHASH.key.pem SSLCACertificateFile /etc/certificates/*.domain.tld.SOMELONGHASH.chain.pem We've verified that the certificate is configured to allow all applications access it (in Keychain Assistant). A diff of the /etc/certificates/*.domain.tld.SOMELONGHASH.key.pem & *.domain.tld.key files shows the former is encrypted and the latter is not, so we're assuming that Server Admin/Keychain Assistant is encrypting them for some reason. I know I can create an unencrypted key file as follows: sudo openssl rsa -in /etc/certificates/*.domain.tld.SOMELONGHASH.key.pem -out /etc/certificates/*.domain.tld.SOMELONGHASH.key.no_password.pem But, I can't do that without entering the password. I thought maybe I could export an unencrypted copy of the key from Keychain Admin, but I'm not seeing such an option (not to mention that the .pem options are greyed out in all export options). Any assistance would be greatly appreciated.

  Read the article

• LDAP installed, running, but can't connect remotely [Ubuntu 10.10]

  - by Casey Jordan

  Hi all, I installed LDAP on my ubuntu 10.10 system, using the tutorial found here: https://help.ubuntu.com/10.10/serverguide/C/openldap-server.html Everything seems to be working well, when logged into the server via ssh I can run commands like: > ldapsearch -xLLL -b "dc=easydita,dc=com" uid=john sn givenName cn dn: uid=john,ou=people,dc=easydita,dc=com sn: Doe givenName: John cn: John Doe So I think that's a good sign that things are working well. However I have had zero luck connecting to the server remotely via GUI tools or command line. I have tied JXplorer, and LDAP administration tool. Running commands like this: > ldapsearch -xLLL -W -H ldap://ice.rit.edu -d1 "dc=easydita,dc=com" ldap_url_parse_ext(ldap://ice.rit.edu) ldap_create ldap_url_parse_ext(ldap://ice.rit.edu:389/??base) Enter LDAP Password: ldap_sasl_bind ldap_send_initial_request ldap_new_connection 1 1 0 ldap_int_open_connection ldap_connect_to_host: TCP ice.rit.edu:389 ldap_new_socket: 3 ldap_prepare_socket: 3 ldap_connect_to_host: Trying 127.0.0.1:389 ldap_pvt_connect: fd: 3 tm: -1 async: 0 ldap_open_defconn: successful ldap_send_server_request ber_scanf fmt ({it) ber: ber_scanf fmt ({i) ber: ber_flush2: 34 bytes to sd 3 ldap_result ld 0xb8940170 msgid 1 wait4msg ld 0xb8940170 msgid 1 (infinite timeout) wait4msg continue ld 0xb8940170 msgid 1 all 1 ** ld 0xb8940170 Connections: * host: ice.rit.edu port: 389 (default) refcnt: 2 status: Connected last used: Thu Mar 17 19:42:29 2011 ** ld 0xb8940170 Outstanding Requests: * msgid 1, origid 1, status InProgress outstanding referrals 0, parent count 0 ld 0xb8940170 request count 1 (abandoned 0) ** ld 0xb8940170 Response Queue: Empty ld 0xb8940170 response count 0 ldap_chkResponseList ld 0xb8940170 msgid 1 all 1 ldap_chkResponseList returns ld 0xb8940170 NULL ldap_int_select read1msg: ld 0xb8940170 msgid 1 all 1 ber_get_next ber_get_next: tag 0x30 len 16 contents: read1msg: ld 0xb8940170 msgid 1 message type bind ber_scanf fmt ({eAA) ber: read1msg: ld 0xb8940170 0 new referrals read1msg: mark request completed, ld 0xb8940170 msgid 1 request done: ld 0xb8940170 msgid 1 res_errno: 49, res_error: <>, res_matched: <> ldap_free_request (origid 1, msgid 1) ldap_parse_result ber_scanf fmt ({iAA) ber: ber_scanf fmt (}) ber: ldap_msgfree ldap_err2string ldap_bind: Invalid credentials (49) I am pretty sure that I set up the admin password correctly, but the tutorial was not very specific about that. (Also could not find instructions on how to reset admin password.) Additional info: I was told that this file might hold important information so I will post it: /etc/ldap/slapd.d/cn=config/olcDatabase={0}config.ldif dn: olcDatabase={0}config objectClass: olcDatabaseConfig olcDatabase: {0}config olcAccess: {0}to * by dn.exact=cn=localroot,cn=config manage by * break olcRootDN: cn=admin,cn=config structuralObjectClass: olcDatabaseConfig entryUUID: eca09490-e524-102f-87c5-17d7a82e8985 creatorsName: cn=config createTimestamp: 20110317205733Z entryCSN: 20110317205733.193089Z#000000#000#000000 modifiersName: cn=config modifyTimestamp: 20110317205733Z Given that it seems I have this almost set up correctly is there any steps I can take to correct this? Thanks, Casey

  Read the article

• Complete Active Directory redesign and GPO application

  - by Wolfgang Kuehne

  after much testing and hundreds of tries and hours invested I decided to consult you experts here. Overview: I want to apply some GPO to our users which will add some specific site to the Trusted Sites in Internet Explorer settings for all users. However, the more I try the more confusing the results become. The GPO is either applied to one group of users, or to another one. Finally, I came to the conclusion that this weird behavior is cause rather by the poor organization in Users and Groups in Active Directory. As such I want to kick the problem from the root: Redesign the Active Directory Users and Groups. Scenario: There is one Domain Controller, and we use Terminal Services (so there is a Terminal Server as well). Users usually log on to the Terminal Server using Remote Desktop to perform their daily tasks. I would classify the users in the following way: IT: Admins, Software Development Business: Administration, Management The current structure of the Active Directory Users and Groups is a result of the previous IT management. The company has used Small Business Server which has created multiple default user groups and containers. Unfortunately, the guys working before me have do no documentation at all. Now, as I inherit this structure I am in the no mans land. No idea which direction to head first. As you can see, the Active Directory User and Groups have become a bit confusing. There is no SBS anymore, but when migrating from SBS to the current Windows Server 2008 R2 environment the guys before me have simply copied the same structure. The real question: Where should I start cleaning from, ensuring that I won't break totally the current infrastructure? What is a nice organization for the scenario that I have explained above? Possible useful info for the current structure: Computers folder contains Terminal Services Computers user group Members: TerminalServer computer located at Server -> Terminalserver OU Member of: NONE Foreign Security Principals : EMPTY Managed Service Accounts : EMPTY Microsoft Exchange Security Groups : not sure if needed, our emails are administered by external service provider Distribution Groups : not sure if needed Security Groups : there are couple of groups which are needed SBS users : contains all the users Terminalserver : contains only the TerminalServer machine

  Read the article

• Setting up a home server - what to use? (ZFS vs btrfs, BSD vs Linux, misc other requirements)

  - by monch1962

  I need to get all our home content off individual machines and onto a central server. What I'd like to have is the metaphorical "server under the stairs". Stuff we need: expandable storage. I want to be able to add extra disc as we go along, with minimal maintenance required. Currently we've got about 3Tb of files we need to host, and that's likely to grow by another Tb every 6-12 months based on recent history. I need to be able to add additional disc with minimal pain needs to store all the media (i.e. photos, video, music) we have, and run services to serve the various devices we have in the house to playback (e.g. DAAP so we can play stuff through iTunes, ccxstream so we can play stuff over XBMC). DAAP and ccxstream are needed now, but we also need to support new standards as they emerge (so a closed-box solution isn't going to work) RAID 5, or something broadly equivalent (e.g. RAID-Z) BitTorrent client ssh, NFS, Samba access snapshot capability (as in ZFS), so we can snapshot individual file systems regularly and rollback when my kids delete their school assignments the day before they're due... ability to recover quickly from power outages (it's not unusual for us to have power outages that last longer than our UPS' batteries) FOSS software a modern distributed version control system running on the box, such as Mercurial Stuff I'd like to have on the server, but can live without: PVR capability, so I could record TV to the box Web server. We currently run a small Web server on a very old box, and I'd ideally like to turn the old box off and move the content to the new server just to save some electricity Nagios + mrtg I've been looking at using a EEE Box as the server, primarily because I can get them cheap and they don't consume much power. The choice of OS and file system is more difficult, from what I've found: I've got most experience with various Linux distros, but am happy to use another Unix FreeBSD and OpenSolaris seem to be the best choices for hosting ZFS OpenSolaris' hardware support is nowhere near as good as e.g. Ubuntu btrfs, while looking very good, doesn't seem ready for prime-time yet ZFS doesn't let you (easily?) add new discs to a RAID5 or RAID-Z reading around, it seems that ZFS is a bit short of tools for recovering lost data At the moment, I'm leaning towards running FreeNAS+ZFS, but I'm concerned about the requirement to be able to add new disc on a fairly regular basis to an existing RAID-Z. Can anyone provide some recommendations, or share experiences? Thanks in advance

  Read the article

• Setting up a home server - what to use? (ZFS vs btrfs, BSD vs Linux, misc other requirements)

  - by monch1962

  I need to get all our home content off individual machines and onto a central server. What I'd like to have is the metaphorical "server under the stairs". Stuff we need: expandable storage. I want to be able to add extra disc as we go along, with minimal maintenance required. Currently we've got about 3Tb of files we need to host, and that's likely to grow by another Tb every 6-12 months based on recent history. I need to be able to add additional disc with minimal pain needs to store all the media (i.e. photos, video, music) we have, and run services to serve the various devices we have in the house to playback (e.g. DAAP so we can play stuff through iTunes, ccxstream so we can play stuff over XBMC). DAAP and ccxstream are needed now, but we also need to support new standards as they emerge (so a closed-box solution isn't going to work) RAID 5, or something broadly equivalent (e.g. RAID-Z) BitTorrent client ssh, NFS, Samba access snapshot capability (as in ZFS), so we can snapshot individual file systems regularly and rollback when my kids delete their school assignments the day before they're due... ability to recover quickly from power outages (it's not unusual for us to have power outages that last longer than our UPS' batteries) FOSS software a modern distributed version control system running on the box, such as Mercurial Stuff I'd like to have on the server, but can live without: PVR capability, so I could record TV to the box Web server. We currently run a small Web server on a very old box, and I'd ideally like to turn the old box off and move the content to the new server just to save some electricity Nagios + mrtg I've been looking at using a EEE Box as the server, primarily because I can get them cheap and they don't consume much power. The choice of OS and file system is more difficult, from what I've found: I've got most experience with various Linux distros, but am happy to use another Unix FreeBSD and OpenSolaris seem to be the best choices for hosting ZFS OpenSolaris' hardware support is nowhere near as good as e.g. Ubuntu btrfs, while looking very good, doesn't seem ready for prime-time yet ZFS doesn't let you (easily?) add new discs to a RAID5 or RAID-Z reading around, it seems that ZFS is a bit short of tools for recovering lost data At the moment, I'm leaning towards running FreeNAS+ZFS, but I'm concerned about the requirement to be able to add new disc on a fairly regular basis to an existing RAID-Z. Can anyone provide some recommendations, or share experiences? Thanks in advance

  Read the article

• Setting up a home server - what to use? (ZFS vs btrfs, BSD vs Linux, misc other requirements)

  - by monch1962

  I need to get all our home content off individual machines and onto a central server. What I'd like to have is the metaphorical "server under the stairs". Stuff we need: expandable storage. I want to be able to add extra disc as we go along, with minimal maintenance required. Currently we've got about 3Tb of files we need to host, and that's likely to grow by another Tb every 6-12 months based on recent history. I need to be able to add additional disc with minimal pain needs to store all the media (i.e. photos, video, music) we have, and run services to serve the various devices we have in the house to playback (e.g. DAAP so we can play stuff through iTunes, ccxstream so we can play stuff over XBMC). DAAP and ccxstream are needed now, but we also need to support new standards as they emerge (so a closed-box solution isn't going to work) RAID 5, or something broadly equivalent (e.g. RAID-Z) BitTorrent client ssh, NFS, Samba access snapshot capability (as in ZFS), so we can snapshot individual file systems regularly and rollback when my kids delete their school assignments the day before they're due... ability to recover quickly from power outages (it's not unusual for us to have power outages that last longer than our UPS' batteries) FOSS software a modern distributed version control system running on the box, such as Mercurial Stuff I'd like to have on the server, but can live without: PVR capability, so I could record TV to the box Web server. We currently run a small Web server on a very old box, and I'd ideally like to turn the old box off and move the content to the new server just to save some electricity Nagios + mrtg I've been looking at using a EEE Box as the server, primarily because I can get them cheap and they don't consume much power. The choice of OS and file system is more difficult, from what I've found: I've got most experience with various Linux distros, but am happy to use another Unix FreeBSD and OpenSolaris seem to be the best choices for hosting ZFS OpenSolaris' hardware support is nowhere near as good as e.g. Ubuntu btrfs, while looking very good, doesn't seem ready for prime-time yet ZFS doesn't let you (easily?) add new discs to a RAID5 or RAID-Z reading around, it seems that ZFS is a bit short of tools for recovering lost data At the moment, I'm leaning towards running FreeNAS+ZFS, but I'm concerned about the requirement to be able to add new disc on a fairly regular basis to an existing RAID-Z. Can anyone provide some recommendations, or share experiences? Thanks in advance

  Read the article

• No Telnet login prompt when used over SSH tunnel

  - by SCO

  Hi there ! I have a device, let's call it d1, runnning a lightweight Linux. This device is NATed by my internet box/router, hence not reachable from the Internet. That device runs a telnet daemon on it, and only has root as user (no pwd). Its ip address is 192.168.0.126 on the private network. From the private network (let's say 192.168.0.x), I can do: telnet 192.168.0.126 Where 192.168.0.126 is the IP address in the private network. This works correctly. However, to allow administration, I'd need to access that device from outside of that private network. Hence, I created an SSH tunnel like this on d1 : ssh -R 4455:localhost:23 ussh@s1 s1 is a server somewhere in the private network (but this is for testing purposes only, it will endup somewhere in the Internet), running a standard Linux distro and on which I created a user called 'ussh'. s1 IP address is 192.168.0.48. When I 'telnet' with the following, let's say from c1, 192.168.0.19 : telnet -l root s1 4455 I get : Trying 192.168.0.48... Connected to 192.168.0.48. Escape character is '^]'. Connection closed by foreign host . The connection is closed after roughly 30 seconds, and I didn't log. I tried without the -l switch, without any success. I tried to 'telnet' with IP addresses instead of names to avoid reverse DNS issues (although I added to d1 /etc/hosts a line refering to s1 IP/name, just in case), no success. I tried on another port than 4455, no success. I gathered Wireshark logs from s1. I can see : s1 sends SSH data to c1, c1 ACK s1 performs an AAAA DNS request for c1, gets only the Authoritave nameservers. s1 performs an A DNS request, then gets c1's IP address s1 sends a SYN packet to c1, c1 replies with a RST/ACK s1 sends a SYN to c1, C1 RST/ACK (?) After 0.8 seconds, c1 sends a SYN to s1, s1 SYN/ACK and then c1 ACK s1 sends SSH content to d1, d1 sends an ACK back to s1 s1 retries AAAA and A DNS requests After 5 seconds, s1 retries a SYN to c1, once again it is RST/ACKed by c1. This is repeated 3 more times. The last five packets : d1 sends SSH content to s1, s1 sends ACK and FIN/ACK to c1, c1 replies with FIN/ACK, s1 sends ACK to c1. The connection seems to be closed by the telnet daemon after 22 seconds. AFAIK, there is no way to decode the SSH stream, so I'm really stuck here ... Any ideas ? Thank you !

  Read the article

• What's the best way to do user profile/folder redirect/home directory archiving?

  - by tpederson

  My company is in dire need of a redesign around how we handle user account administration. I've been tasked with automating the process. The end goal is to have the whole works triggered by the business, and IT only looking in when there's an error reported. The interim phase is going to be semi-manual. That is a level 2 tech inputs the user's info and supervises the process. The current hurdle I'm facing is user profile archiving. Our security team requires us to archive the profile directories for any terminated user for 60 days in case the legal team requires access to their files. Our AD is as much a mess as everything else, so there are some users with home directories and some with profiles. Anyone who has a profile dir in AD also has a good deal of their profile redirected to our file servers over DFS. In order to complete the process manually you find the user in AD, disable them, find their home/profile dir, go there and take ownership, create an archive folder, move all their files over, then delete the old dir. Some users have many many gigs of nonsense and this can take quite some time. Even automated the process would not be a quick one. I'm thinking that I need to have a client side C# GUI for the quick stuff and some server side batch script or console app to offload this long running process. I have a batch script that works decently using takeown and robocopy, but I wonder if a C# console app would do a better job. So, my question at long last is, what do you think is the best way to handle this? I can't imagine this is a unique problem, how do other admins get this done? The last place I worked was easily 10x larger than the place I'm in now. If we would have been doing this manual crap there, they'd have needed a team of at least 30 full time workers to keep up. I have decent skills in C#.net and batch scripting, but am a quick study and I have used most every language once or twice. Thank you for reading this and I look forward to seeing what imaginative solutions you all can come up with.

  Read the article

• How Do I Restrict Repository Access via WebSVN?

  - by kaybenleroll

  I have multiple subversion repositories which are served up through Apache 2.2 and WebDAV. They are all located in a central place, and I used this debian-administration.org article as the basis (I dropped the use of the database authentication for a simple htpasswd file though). Since then, I have also started using WebSVN. My issue is that not all users on the system should be able to access the different repositories, and the default setup of WebSVN is to allow anyone who can authenticate. According to the WebSVN documentation, the best way around this is to use subversion's path access system, so I looked to create this, using the AuthzSVNAccessFile directive. When I do this though, I keep getting "403 Forbidden" messages. My files look like the following: I have default policy settings in a file: <Location /svn/> DAV svn SVNParentPath /var/lib/svn/repository Order deny,allow Deny from all </Location> Each repository gets a policy file like below: <Location /svn/sysadmin/> Include /var/lib/svn/conf/default_auth.conf AuthName "Repository for sysadmin" require user joebloggs jimsmith mickmurphy </Location> The default_auth.conf file contains this: SVNParentPath /var/lib/svn/repository AuthType basic AuthUserFile /var/lib/svn/conf/.dav_svn.passwd AuthzSVNAccessFile /var/lib/svn/conf/svnaccess.conf I am not fully sure why I need the second SVNParentPath in default_auth.conf, but I just added that today as I was getting error messages as a result of adding the AuthzSVNAccessFile directive. With a totally permissive access file [/] joebloggs = rw the system worked fine (and was essentially unchanged), but as I soon as I start trying to add any kind of restrictions such as [sysadmin:/] joebloggs = rw instead, I get the 'Permission denied' errors again. The log file entries are: [Thu May 28 10:40:17 2009] [error] [client 89.100.219.180] Access denied: 'joebloggs' GET websvn:/ [Thu May 28 10:40:20 2009] [error] [client 89.100.219.180] Access denied: 'joebloggs' GET svn:/sysadmin What do I need to do to get this to work? Have configured apache wrong, or is my understanding of the svnaccess.conf file incorrect? If I am going about this the wrong way, I have no particular attachment to my overall approach, so feel free to offer alternatives as well. UPDATE (20090528-1600): I attempted to implement this answer, but I still cannot get it to work properly. I know most of the configuration is correct, as I have added [/] joebloggs = rw at the start and 'joebloggs' then has all the correct access. When I try to go repository-specific though, doing something like [/] joebloggs = rw [sysadmin:/] mickmurphy = rw then I got a permission denied error for mickmurphy (joebloggs still works), with an error similar to what I already had previously [Thu May 28 10:40:20 2009] [error] [client 89.100.219.180] Access denied: 'mickmurphy' GET svn:/sysadmin Also, I forgot to explain previously that all my repositories are underneath /var/lib/svn/repository UPDATE (20090529-1245): Still no luck getting this to work, but all the signs seem to be pointing to the issue being with path-access control in subversion not working properly. My assumption is that I have not conf

  Read the article

• Dangers of Running Computers w/o Air Conditioning

  - by Daniel Bingham

  I recently moved in to an apartment with out air conditioning. This is fine most of the time as I am in upstate New York. It only ever gets above the high 70s during the hottest of the summer months. And when it does, I'm stubborn enough that I'll just deal with wearing minimal clothing around the house. However, I'm worried about my computers. I'm a software developer and gamer, so many of my machines are very high powered. And at least one of them is a server that must be left on 24/7 (not just a game server - also serves multiple websites). I've never before had to worry about the heat too much, as I always lived in buildings with central air. The in building temperature rarely got much above 70 F. All of the machines I built had good enough air cooling that I never saw a problem. Now the temperature in building is pushing 100F and I'm worried that the machines will not be able to keep themselves cool enough by simply blowing already hot air over themselves. The hottest of them I've turned off. However, the server I cannot. It's an old Dell (not custom build) that runs on a Pentium 4 (2.2GHz). It only has a single hard drive, integrated video. And it'd not running any processor intensive servers. Just basic LAMP. It used to run a MUD server, but that's off for now. So it should be idling most of the time. I haven't been able to find any sort of built in temperature sensors in the hardware... at least not any that the programs I've found in the Debian repository can read. And it's an inherited machine to which I do not have the full specs, so I don't know the tolerances anyway. How worried should I be about it melting down on me? How worried should I be about the hard drive melting or becoming corrupted? To generalize the question for other people, what are the safe temperature tolerances for most machines. How widely does it vary, and how does one go about determining when their machine is running too hot and needs to be shut down?

  Read the article

• networked storage for a research group, 10-100 TB

  - by Marc

  this is related to this post: http://serverfault.com/questions/80854/scalable-24-tb-nas-for-research-department but perhaps a little more general. Background: We're a research lab of around 10 people who do a lot of experiments that involve taking pictures at one of several lab setups and then analyzing it an one of several lab computers. Each experiment may produce 2 or 3 GB of data, and we are generating data at the rate of about 10 TB/year. Right now, we are storing the data on a 6-bay netgear readynas pro, but even with 2 TB drive, this only gives us 10 TB of storage. Also, right now we are not backing up at all. Our short term backup plan is to get a second readynas, put it in a different building and mirror the one drive onto the other. Obviously, this is somewhat non-ideal. Our options: 1) We can pay our university $400/ TB /year for "backed up" online storage. We trust them more than we trust us, but not a whole lot. 2) We can continue to buy small NASs and mirror them between offices. One limit, although stupid, is that we don't have an unlimited number of ethernet jacks. 3) We can try to implement our own data storage solution, which is why I'm asking you guys. One thing to consider is that we're a very transient population and none of us are network administration experts. I will probably be here only another year or so, and graduate students, who are here the longest, have a 5-6 year time scale. So nothing can require expert oversight. Our data transfer rates are low - most of the data will just sit on the server waiting for someone to look at it once or twice - so we don't need a really high speed system. Given these contraints, can someone recommend a fairly low-cost, scalable, more or less turn key shared data storage system with backup in a separate physical location. Does such a thing exist or should we just pay the university to take care of it for us? As a second question, our professor just got tenure and is putting together a budget. Here the goal is to ask for as much as you can and hope you get a fraction of it. So the same question, minus the low-cost. Without budget constraints, can you recommend a scalable turn-key backed up storage system. Thanks

  Read the article

• Deploying website content via Subversion

  - by Johann

  we have recently set up a new development infrastructure and process for one of our clients. This involves the strict use of subversion as a central source code repository. The svn repositories contains a seperate branch for code on the live system (/branches/live/). The repositories are use for PHP content (mainly Wordpress Blogs), but in future they may hold other asp code as well. Bonus points for a solutions which more or less in the same way with ASP code on Windows Server 2008 R2. We have two servers: one staging system and one live system. The staging system is updated regularly with the code of the trunk. The live system is update manually. Each webroot on the servers are working copy of either the trunk (staging system) or the live branch (live system). The current workflow is: Developing on the dev's box - commit into the trunk - auto-deploy on staging system - testing on the staging system - merging into /branches/live/ - manual deployment on live system. This works for one-way changes very well, however we have some troubles on every wordpress (or plugin) update: The WP update process removes the directories and unpack the archive of the new version. This removes the svn admin area as well, which produces a lot of errors. We could switch to SVN 1.7 with a single, global admin area, but this would only solve on part of the problem. Finally, we have done the update via the WP Gui, restored the svn admin area, added/removed the files and committed the changes to the trunk. After testing, we had to do basically the same thing on the live server (except the commit, we just reverted the changes and merged the new files from the staging system to the live system). I'm currently thinking of the following: The htdocs of each website is a svn export Each website has a svn working copy beside the htdocs directory a script which "replays" the changes in the wc from htdocs after an update in WP (rsync'ing the changed files to the working copy, rsync'ing new files and svn add them and finally svn delete the deleted files). The script would have to exclude some files (like wp-config.php, uploads/temp directories, etc.). Are there better ways to do this? Unfortunaly, a complete CI server is out of scope due to time and budget limitations.

  Read the article

• Unextending Sharepoint 2007 Web Application from a zone

  - by dunxd

  When our Sharepoint was migrated from Sharepoint 2003 to Sharepoint 2007 (both fully paid versions), the consultants who carried it out extended each web app into two IIS sites/zones (e.g. the original Web App was http://intranet, then http://newintranet and http://intranet would be created for Sharepoint 2007 - each with its own IIS site). The idea was that during the migration period we would set up DNS to point the old url to SP2003 servers and the new one to SP2007, then once the migration was complete, do a DNS change so the SP2007 would recieve the requests to the http://intranet type URLs. Unfortunately the contractors did not tidy up the application extensions and IIS sites after the migration, and for some time both URLs were in use, resulting in many document links pointing to the http://newintranet type URLs. This means I need to maintain these URLs. Due to a rejig of organisation structure we now need to relocate some Sharepoint sites, and I'd like to use the RDA Collaboration Sharepoint URL Redirector feature. However a limitation of this is that it doesn't work for Web Applications which have been extended into multiple zones. So I have a need to tidy up the situation that our consultants left behind. I think the right thing to do is use the "Remove Sharepoint from IIS Web Site" page in Central Admin to remove the zone for the newintranet type sites, and select the option to also delete the IIS site. That should result in having no IIS sites listening for http://newintranet type URLs. Is this the right procedure? Once I have done that I need to set up Sharepoint to receive requests sent to the http://newintranet type URLs so they will continue to work. I am not sure if I should do this: using Alternative Access Mappings or, by adding a host header to the IIS site or, creating a non Sharepoint IIS site for each http://newintranet type URL, and use IIS redirection to forward the requests to the new URL using variables to pass the path to the Sharepoint site. Does anyone have any thoughts on these options, or any other way of achieving this? Sharepoint 2007 is running on Windows 2003 with IIS6. We don't currently have plans/budget to upgrade to Sharepoint 2010.

  Read the article

• Scaling a video processing application on EC2?

  - by Stpn

  I am approaching the need to scale a video-processign application that runs on EC2. So far the setup is one machine: Backbonejs frontend Rails 3.2 Postgresql Resque + S3 for storage The flow of the app is as follows: 1) Request from frontend. Upload a video. 2) Storing video 3) Quering external APIs. 4) Processing / encoding videos. 5) Post to frontend. I can separate the backend and frontend without any problems, but when it comes to distributing the backend between several servers I am a bit puzzled. I can probably come up with a temporary solution (like just duplicating apps making several instances), but since I don't really have expertise in backend system administration, there can be some fundamental mistakes.. Also I would rather have something that is scalable. I wonder if anyone can give some feedback on the following plan: A) Frontend machine. Just frontend, talks to backend via REST Api of sorts. B) Backend server (BS), main database. Gets request from 1), posts to 2) saves uploads to 3) C) S3 storage. D) Server for quering APIs. Basically just a Resque workers, that post info back to 2) E) Server for video encoding. Processes videos uploaded on 3) and uploads them back. So I will have: A)frontend \ \ B)MAIN_APP/DB ----- C)S3 Storage (Files) / \ / / \ / D)ExternalAPI_queries E)Video_Processing (redundant DB) (redundant DB) All this will supposedly talk to each other via HTTP requests. My reason for this is that Video Processing part is really the most resource-intensive and I would just run barebones application that accepts requests and starts processing them. Questions: 1) In this setup I will have the main database at B) and all other servers will communicate with it via HTTP requests (and store duplicates of databases also I guess..for safety reasons). Is it the right approach or should I have 1 database that everyone connects to (how then?) 2) Is it a good idea to separate API queries from Video Processing part? Logically they are very close (processing is determined by the result of API queries), but resource-wise Video Processing is waaay more intensive. 3) what should I use to distribute calls between backend apps based on load?

  Read the article

• Port forwarding not working properly

  - by sudo work

  I'm trying to host a small web server from my home network; however, I have not been able to successfully port forward ports to the local server. My current network topology looks like this: Cable Modem/Router - Secondary Wireless Router - Many computers (including server) The modem/router I'm using is a Cisco (Scientific Atlantic) DPC2100, provided by my ISP. The wireless router that I'm using as the central hub to my home network is a Linksys E3000. The computer being used as a server is running Ubuntu 10.04 Server Edition. The main issue is that I can't access the server remotely, using my WAN IP address. I have port forwarded my wireless router; however, I believe that I need to somehow set my modem to bridge mode. As far as I can tell though, this isn't possible. Here are the various IP address settings: DPC2100 WAN: 69.xxx.xxx.xxx Internal IP: 192.168.100.1 Internal Network: 192.168.7.0 E3000 IP Address: 192.168.7.2 Gateway: 192.168.7.1 Internal IP: 192.168.1.1 Internal Network: 192.168.1.0 Server IP Address: 192.168.1.123 Gateway: 192.168.1.1 Now I can do an nmap at various nodes, and here are the results (from the server): nmap localhost: 22,25,53,80,110,139,143,445,631,993,995,3306,5432,8080 open nmap 192.168.7.2: 22,25,80 (filtered),110,139,445 open (ports I have forwarded in the E3000)* nmap 69.xxx.xxx.xxx: 1720 open *For some reason, I can SSH into the server at 192.168.7.2, but not view the website. Here are also some other settings: /etc/hosts/ 127.0.0.1 localhost 127.0.1.1 servername ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters /etc/apache2/sites-available/default snippet <VirtualHost *:80> DocumentRoot /srv/www/ <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> ... </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> ... </Directory> ErrorLog /var/log/apache2/error.log LogLevel warn CustomLog /var/log/apache2/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> ... </Directory> </VirtualHost> Let me know if you need any other information; some stuff probably slipped my mind.

  Read the article

• How to disable or tune filesystem cache sharing for OpenVZ?

  - by gertvdijk

  For OpenVZ, an example of container-based virtualization, it seems that host and all guests are sharing the filesystem cache. This sounds paradoxical when talking about virtualization, but this is actually a feature of OpenVZ. It makes sense too. Because only one kernel is running, it's possible to benefit from sharing the same pages of filesystem cache in memory. And while it sounds beneficial, I think a set up here actually suffers in performance from it. Here's why I think why: my machines aren't actually sharing any files on disk so I can't benefit from this feature in OpenVZ. Several OpenVZ machines are running MySQL with MyISAM tables. MyISAM relies on the system's filesystem cache for caching of data files, unlike InnoDB's buffer pool. Also some virtual machines are known to do heavy and large I/O operations on the same filesystem in the host. For example, when running cat *.MYD > /dev/null on some large database in one machine, I saw the filesystem cache lowering in another, monitored by htop. This essentially flushes all the useful filesystem cache in guests (FIFO) and so it flushes the MySQL caches in the guests. Now users are complaining that MySQL is very slow. And it is. Some simple SELECT queries take several seconds on times disk I/O is heavily used by other machines. So, simply put: Is there a way to avoid filesystem cache being wiped out by other virtual machines in container-based virtualization? Some thoughts: Choosing algorithm for flushing filesystem cache in the kernel. (possible? how?) Reserving a certain amount of pages for a single VM. (seems no option for filesystem cache type of pages that reading man vzctl) Will running MySQL on another filesystem get me anywhere? If not, I think my alternatives are: Use KVM for MySQL-MyISAM running VMs. KVM actually assigns memory to the VM and does not allow swapping out caches unless using a balloon driver. Move to InnoDB and tune the buffer pools, dirty pages, etc. This is now considered to be 'nice to have' on the long-term as not everyone responsible for administration of the system understands InnoDB. more suggestions welcome. System software: Proxmox (now 1.9, could be upgraded to 2.x). One big LV assigned for the VMs.

  Read the article

• Is there a Distributed SAN/Storage System out there?

  - by Joel Coel

  Like many other places, we ask our users not to save files to their local machines. Instead, we encourage that they be put on a file server so that others (with appropriate permissions) can use them and that the files are backed up properly. The result of this is that most users have large hard drives that are sitting mainly empty. It's 2010 now. Surely there is a system out there that lets you turn that empty space into a virtual SAN or document library? What I envision is a client program that is pushed out to users' PCs that coordinates with a central server. The server looks to users just like a normal file server, but instead of keeping entire file contents it merely keeps a record of where those files can be found among various user PCs. It then coordinates with the right clients to serve up file requests. The client software would be able to respond to such requests directly, as well as be smart enough to cache recent files locally. For redundancy the server could make sure files are copied to multiple PCs, perhaps allowing you to define groups in different locations so that an instance of the entire repository lives in each group to protect against a disaster in one building taking down everything else. Obviously you wouldn't point your database server here, but for simpler things I see several advantages: Files can often be transferred from a nearer machine. Disk space grows automatically as your company does. Should ultimately be cheaper, as you don't need to keep a separate set of disks I can see a few downsides as well: Occasional degradation of user pc performance, if the machine has to serve or accept a large file transfer during a busy period. Writes have to be propogated around the network several times (though I suspect this isn't really much of a problem, as reading happens in most places more than writing) Still need a way to send a complete copy of the data offsite occasionally, and this would make it very hard to do differentials Think of this like a cloud storage system that lives entirely within your corporate LAN and makes use of your existing user equipment. Our old main file server is due for retirement in about 2 years, and I'm looking into replacing it with a small SAN. I'm thinking something like this would be a better fit. As a school, we have a couple computer labs I can leave running that would be perfect for adding a little extra redundancy to the system. Unfortunately, the closest thing I can find is Dienst, and it's just a paper that dates back to 1994. Am I just using the wrong buzzwords in my searches, or does this really not exist? If not, is there a big downside that I'm missing?

  Read the article

• PHP 5.2 to 5.3 not upgrading, no errors

  - by Webnet

  I'm following this guide: http://atik97.wordpress.com/2010/06/12/how-to-upgrade-to-php-5-3-in-ubuntu-9-10/ I've done all the steps, but it's still showing php 5.2.6 - any ideas? I have also tried -cgi instead of -cli, neither have any effect. update I've tried rebooting the server to see if that would have any effect and unfortunately it didn't update Output of dpkg -l *php*: Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad) ||/ Name Version Description +++-=============================================-=============================================-========================================================================================================== un libapache2-mod-php4 <none> (no description available) ii libapache2-mod-php5 5.2.6.dfsg.1-3ubuntu4.6 server-side, HTML-embedded scripting language (Apache 2 module) un libapache2-mod-php5filter <none> (no description available) ii php-pear 5.2.6.dfsg.1-3ubuntu4.6 PEAR - PHP Extension and Application Repository un php4-cli <none> (no description available) un php4-dev <none> (no description available) un php4-mysql <none> (no description available) un php4-pear <none> (no description available) ii php5 5.2.6.dfsg.1-3ubuntu4.6 server-side, HTML-embedded scripting language (metapackage) ii php5-cgi 5.2.6.dfsg.1-3ubuntu4.6 server-side, HTML-embedded scripting language (CGI binary) ii php5-cli 5.2.6.dfsg.1-3ubuntu4.6 command-line interpreter for the php5 scripting language ii php5-common 5.2.6.dfsg.1-3ubuntu4.6 Common files for packages built from the php5 source ii php5-curl 5.2.6.dfsg.1-3ubuntu4.6 CURL module for php5 un php5-dev <none> (no description available) ii php5-gd 5.2.6.dfsg.1-3ubuntu4.6 GD module for php5 ii php5-imap 5.2.6-0ubuntu5.1 IMAP module for php5 un php5-json <none> (no description available) ii php5-mcrypt 5.2.6-0ubuntu2 MCrypt module for php5 ii php5-mysql 5.2.6.dfsg.1-3ubuntu4.6 MySQL module for php5 un php5-mysqli <none> (no description available) ii php5-xsl 5.2.6.dfsg.1-3ubuntu4.6 XSL module for php5 un phpapi-20060613+lfs <none> (no description available) ii phpmyadmin 4:3.1.2-1ubuntu0.2 MySQL web administration tool update The following commands and their outputs: grep php53 /etc/apt/sources.list deb http://php53.dotdeb.org stable all deb-src http://php53.dotdeb.org stable all apt-cache search -f "libapache2-mod-php5" http://pastebin.com/XNXdsXYC update I've updated the question with more details on installed packages.

  Read the article

• IT merger - self-sufficient site with domain controller VS thin clients outpost with access to termi

  - by imagodei

  SITUATION: A larger company acquires a smaller one. IT infrastructure has to be merged. There are no immediate plans to change the current size or role of the smaller company - the offices and production remain. It has a Win 2003 SBS domain server, Win 2000 file server, linux server for SVN and internal Wikipedia, 2 or 3 production machines, LTO backup solution. The servers are approx. 5 years old. Cisco network equippment (switches, wireless, ASA). Mail solution is a hosted Exchange. There are approx. 35 desktops and laptops in the company. IT infrastructure unification: There are 2 IT merging proposals. 1.) Replacing old servers, installing Win Server 2008 domain controller, and setting up either subdomain or domain trust to a larger company. File server and other servers remain local and synchronization should be set up to a centralized location in larger company. Similary with the backup - it remains local and if needed it should be replicated to a centralized location. Licensing is managed by smaller company. 2.) All servers are moved to a centralized location in larger company. As many desktop machines as possible are replaced by thin clients. The actual machines are virtualized and hosted by Terminal server at the same central location. Citrix solutions will be used. Only router and site-2-site VPN connection remain at the smaller company. Backup internet line to insure near 100% availability is needed. Licensing is mainly managed by larger company. Only specialized software for PCs that will not be virtualized is managed by smaller company. I'd like to ask you to discuss both solutions a bit. In your opinion, which is better from the operational point of view? Which is more reliable, cheaper in the long run? Easier to manage from the system administrator's point of view? Easier on the budget and easier to maintain from IT department's point of view? Does anybody have any experience with the second option and how does it perform in production environment? Pros and cons of both? Your input will be of great significance to me. Thank you very much!

  Read the article

• How to tune system settings for mongoDB on Linux?

  - by jsh

  Trying to squeeze a lot out of one question here -- please bear with me. Although the MongoDB man pages make several useful recommendations about system settings like ulimit (http://docs.mongodb.org/manual/reference/ulimit/), and other production factors (http://docs.mongodb.org/manual/administration/production-notes/) they seem mysteriously silent on things like virtual memory and swap settings. The closest we get to a hint is that "...the operating system’s virtual memory subsystem manages MongoDB’s memory..." (http://docs.mongodb.org/manual/faq/fundamentals/#does-mongodb-require-a-lot-of-ram). Running the same job - high writes and high reads on about 10,000,000 records in a single collection -- on my 4-processor, 4GB RAM macbook and an 8-core ubuntu box with 64GB RAM I saw dramatically WORSE read performance on the linux box with factory settings, and could hear the disk constantly spinning, indicating high I/O and presumably swapping. Yes, other things were happening on the box, but there was plenty of free RAM, disk space, etc.; furthermore, I did not see evidence that Mongo was expanding to take advantage of all that free RAM as it is touted to do. Linux box default settings were as follows: vm.swappiness =60 vm.dirty_background_ratio = 10 vm.dirty_ratio = 20 vm.dirty_expire_centisecs =3000 vm.dirty_writeback_centisecs=500 I hazarded some guesses looking at docs and blogs for other types of databases (Oracle, MYSQL, etc.), experimented, and adjusted as below. vm.swappiness=10 vm.dirty_background_ratio=5 vm.dirty_ratio=5 vm.dirty_writeback_centisecs=250 vm.dirty_expire_centisecs=500 I saw some immediate apparent improvements in read time. However, when I ran my test jobs again, read performance continued to be painfully sluggish during heavy writes. Then, I REBUILT the collection from an available data source - and suddenly I can read at 1ms or less per record WHILE doing the write job! So the question is really two-fold: 1) What are appropriate VM settings for MongoDB on Linux? 2) (bonus) Does Mongo do some checking or optimization with the OS while data is being built? In other words, if I have built a large data set with suboptimal VM or I/O settings, does Mongo make assumptions during the memory-mapping process that will fail to take advantage of optimizations down the road? Obviously I don't fully grok memory mapping under the hood (I was hoping I wouldn't have to). Any help appreciated...thanks! -j

  Read the article

• SQL Transactional Replication snapshot not applying

  - by dmch2

  Hi, I'm using SQL Transactional Replication with pull subscriptions to replicate databases (hosting their own distribution database) from several servers across a VPN to a central server. I've got the first 2 databases working fine but the 3rd one is causing me problems. My subscription server is SQL 2008, the source systems are all SQL 2005. The source databases are a few 100Mb in size and contain audit data so are simply growing slowly by adding new records at approx 1kb a second. As far as the replication monitor, Agent logs and event logs show everything is working fine - except that no data appears in my subscription database. The distribution agent doesn't seem to want to read the snapshot (and hence the initial state and schema) from the publisher. New transactions aren't applied although they do seem to be arriving OK as the replication monitor shows things like '5 transactions with 10 commands were delivered'. I would expect (as in previous times) to see statements about data being BCPed in the replication monitor. The snapshot is on the publisher on a shared folder. The subscriber can view the snapshot OK (\\repldata) and the alt snapshot folder is pointing at it. But the distribution agent doesn't seem to be making an attempt to do read it. I tried changing the snapshot path to something that's incorrect and didn't even get an error saying that it couldn't access it. After lots of googling etc I found that sp_MSget_repl_commands is called by the subscriber on the distribution database on the publisher. Running a profiler I can see that it's only called for one agent Id. After a reinit it's called for sequence number 0x0 as expected so I thought that would mean it's would look for the snapshot. However, looking on the publisher I see that there's data for two agents - the snapshot agent and the log reader agent (which is being queries). So I guess I need to tell the distribution agent to get the data for both. But how? and more importantly - why? It worked fine on the other two servers I've replicated. I'm not an SQL novice but this is pretty much my first go at replication so don't be afraid to accuse me of missing something obvious/stupid! I can get log files (eg from the distribution agent) if you want but they don't seem to have any errors in them - it just starts up and starts applying log reader agent changes. Cheers Dave

  Read the article

< Previous Page | 147 148 149 150 151 152 153 154 155 156 157 158  | Next Page >