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• Mysql replication, one database server process

  - by Jonny

  On my development box, I want to experiment with a replication setup. But I don't want to create several mysqld processes (is it even possible?). I figured I have the main database in the process - have this as the master, then in the same process create the slave databases, and have the master data replicated into the databases that exist in the same db server. Is this possible? Is there an easier way of achieving this without trying to set up replication? Maybe to put it more simply: I want my Mysql server to be both master and slave(s) at the same time.

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• PostgresQL on Amazon EBS volume, realistic performance, or move to something more lightweight?

  - by Peck

  Hi, I'm working on a little research project, currently running as an instance on ec2, and I'm hoping to figure out whether I'm going down the right path. We, like a thousand other people, are making use of some of twitters streaming feeds to do gather some data to have fun with and my db seems to be having problems keeping up, and queries take what seems to be a very long time. I'm not a DBA by trade, so I'll just dump some info here and add more if need be. System specs: ec2 xl, 15 gigs of ram ebs: 4 100 gb drives, raid 0. The stream we're getting we're looking at around 10k inserts per minute. 3 main tables, with the users we're tracking somewhere in the neighborhood of 26M rows currently. Is this amount of inserts on this hardware too much to ask out of ebs? Should take a look at some things with less overhead like mongodb?

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• Problems with merge replication

  - by jess

  Hi, We are developing a multi-user desktop application with users located in different countries. The platform is - .net 3.5, SQL Server 2008, WinForms. Now, my client has used the help of a DBA who has implemented merge replication. To facilitate replication, we made all our primary keys as GUID. Now, we are facing these issues with replication - subscribers expiration sometimes stops replication and we have found no clean way to re-add every change to db schema requires to poll the whole data all over again! This seems to be strange, what could be the problem here? Also, sometimes we have duplicate keys, and that too stops replication I am sure these issues can be resolved. Maybe, we have not gone the right way to implement. Can you suggest how to go about implementing. Or, is the above information enough to diagnose the problem?

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• Refering to another field in a form and return entries based on the filed

  - by Claus Machholdt

  Structure of DB is: Org_Year(Table) ID Org_Name_ID Org_Year Ft(Table) ID Org_Year_ID Count Org_Name(Table) ID Org_Name I've created a form to input data into Ft. Form has reference to Org_name. I should be able to choose between different org first. Afterwards i want to choose which year to enter data into Ft for. I only want to be presented with a list of Years according to the entries in the Org_Year table, where org matches my selection in the dropdown above. The query to populate the select box (Org_year_Box) is: SELECT Org_Year FROM Org_Year WHERE Org_Name_ID=Organisation_Name_ID.value; I't doesn't return the Years for the given Org_id when using the above query. But if i replace "Organisation_Name_ID.value" with the actual value ie. "2" it returns the correct years. How to do?

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• error on remote connection to mysql

  - by Ahmet vardar

  Hi, I ve been trying to connect my dedicated server mysql db from my computers localhost my code is here; $dbhost = 'domain.com'; $dbuser = 'username'; $dbpass = 'pass'; $conn = mysql_connect($dbhost, $dbuser, $dbpass) or die('Could not connect: ' . mysql_error()); $dbname = 'dbname'; mysql_select_db($dbname); I get that error Could not connect: Lost connection to MySQL server at 'reading initial communication packet', system error: 61 Dedicated server is Linux centos 64 bit, php 3.2.4, mysql 5.1.54 Is there any workaround that ? Thanks

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• CentOS Existing host to new host with all data/files

  - by ganesh

  Good noon. Our small startup management decided to move our production server from existing provider to azure. We have centOS on both. It is for classified's related site, considerable amount of data and ~thousands users with their disc space quota. This is our first time moving our servers. I need your Guidance and suggestions on these. 1) How to migrate the mysql db (dump OR slave OR copy filesystem)? 2) How to manage the emails during the downtime. 3) Manage the files 4) How to security/Firewall check list for the new system 5) IP/DNS related Checklist 6) Anything that I missed out!. Since first time, planning to be more cautious. Any reference documents Highly appreciated. Thank you all!.

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• Which tool / technology: System management for databases and dependent services

  - by Filburt

  I'm looking for advice on how to enable our team to take down and re-start our company systems for maintainance purposes. The scenario includes several Oracle db machines several MS SQL Server machines with multiple instances windows services (IIS etc.) BizTalk EAI solution Apache and Tomcat instances lots of scheduled tasks on win2003 and win2008 machines (physical and virtual). The main focus is on capture all dependencies between said databases and services and tasks connecting to them. At the moment an enterprise class solution is not an option. We are considering developing a solution driven by PowerShell scripts but I hope for some more suggestions.

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• OLTP Sql Server RAID configuration with 10 disks, allocation Unit and disk stripe size

  - by Chris Wood

  On a new db server I only have 10 disks to play with, The usage is about a booking every 3-5 seconds, so not high volume, I know compromises have to be made, but my initial thoughts are - DISK 1 & 2 - RAID 1 - OS DISKS 3,4,5,6 - RAID 10 - Data, Indexes & TempDB DISKS 7,8,9,10 - RAID 10 - Logs & Backup Full backups will take place when there is virtually no traffic on the website so not bothered about the contention with the logs. disk 3-10 - 8kb NTFS unit allocation size disk 3-10 - 64kb Disk Stripe size does this seems to be sensible, any other considerations I have omitted ? thanks

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• Using AutoMySQLBackup on Rackspace Cloud

  - by xref

  Since Rackspace Cloud only allows FTP access it makes using AutoMySQLBackup a little trickier, and while it is at least creating DB dumps I get errors in the backup log: ###### WARNING ###### Errors reported during AutoMySQLBackup execution.. Backup failed Error log below.. .../backups/automysqlbackup: line 1791: /usr/bin/find: Permission denied .../backups/automysqlbackup: line 1855: /usr/bin/find: Permission denied .../backups/automysqlbackup: line 803: /usr/bin/find: Permission denied .../backups/automysqlbackup: line 1972: /usr/bin/du: Permission denied Since files are being created I'm assuming the find command failing has to do with actually rotating out and deleting the old backups? Line 803: find "${CONFIG_backup_dir}/${subfolder}${subsubfolder}" -mtime +"${rotation}" -type f -exec rm {} \; Any ideas for alternatives?

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• My PowerShell functions do not appear to be registered

  - by Frank

  Hi there, I have a ps1 script in which I define 2 functions as such: function Invoke-Sql([string]$query) { Invoke-Sqlcmd -ServerInstance $Server -Database $DB -User $User -Password $Password -Query $query } function Get-Queued { Invoke-Sql "Select * From Comment where AwaitsModeration = 1" } I then call the ps1 file by typing it in (it's in a folder in the path, and autocompletion works) However, I cannot start using the functions. I am confused, because when I copy / paste the functions into the console, all is fine and they work. I also have a function defined in my profile, and it works. Where am I thinking wrong, why doesn't it work what I'm trying to do?

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• Provision storage in SAN encironment

  - by wildchild

  hi,.. Can somebody help in understanding how Lun Provisioning is done in clariion based on client requirement. Say, a client needs one 50 GB space on the host( for application) ,two -350 GBs ( for DB and stuff) on the same host and i have 4 raid groups with space of 200 GB in one 50 GB in second and 400 GB and 400GB in rest two all having 5 disks. And , I 'm using Raid 5 only. How do i provision keeping performance in mind( so that performance hit is not there)?..And i need to understand the concept of meta head as well. Please help me by elaborating the above scenario..I am learning to provision storage in non productive environment( b'fore going ahead and working on client prod server) and i have been learning a lot from SF ...I request the seniors here to help me understand it better. Thanks for reading

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• Vacation sends autoreply message to the recipient as well

  - by elitalon

  Hi, I have configured my Postfix server with vacation for a domain. Sending a message to [email protected] causes two events: The message is delivered to the recipient ([email protected]) An auto-reply message is sent to the sender, alerting that [email protected] should be used instead. Everything works well except for one particular drawback: the auto-reply is also sent to the recipient, so it receives two messages in the end. What can I do to avoid that? I'm only using the $TO variable in the custom vacation.msg message. And here is Postfix's master.cf vacation line: autoreply unix - n n - - pipe flags=Rhu user=vacation argv=/usr/bin/vacation -j -m /home/vacation/.vacation.msg -f /home/vacation/.vacation.db vacation I know using the -j is a little bit risky according to man page, but I'm kind of testing here.

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• Command line audio library manager for Linux

  - by Ketil

  Hi all Hear is my set-up, I have a Linux server that is running Music Player Demon, all the audio files are under a dir (/muzik) which is exported by NFS. So to add files to the MPD database, I just drop the files into the /muzik NFS share and up date the MPD db, so far so good, but I would like to keep the dir strucher belowe /muzik in sum sort of order. To achieve this I am using Amarok, wich a start on my laptop and then use the organise files command to sort the files in into a sensible dir strucher based on the tags in the files. Do you know of any command line utility that can do the same thing that I am using Amarok for so I can run it from cron on the server and automate the process? I hope that this make sense.

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• What port does OpenLink ODBC Driver use?

  - by user36737

  I use Avaya Reporting Services and OpenLink ODBC Drivers for db connection. I know that it uses port 5000 for handshaking but after that I believe it uses an random port for communication. I want to deploy my application and it will communicate with the client's system in their datacenter. They are asking what ports should they open on their firewalls. I can't obviously give them a range above 50,000 that I know OpenLink ODBC Drivers use. Can someone tell me what port should I tell my client to open?

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• Does exist an MKV meta tag / metadata editor?

  - by Vittorio

  Hi, I'm looking for an MKV meta tag editor, I'm using PLEX Media Server and PLEX Media Center on my iMac to see movies. PLEX is great because it automatically find and name all my movie library with year, director, gender, original title, description, movie poter art, etc. Unfortunately, it saves all the data only on a app DB file without edit any tag on the MKV files. A 20% of the movies needs to be fixed or PLEX needs help to find exactly the movie name, so if I need to move all my library elsewere, I need to do all the tagging work again. So, does exists MKV meta tag editor? Oh I'm a Mac user

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• Redmine Subversion: LDAP _and_ local auth

  - by Frank Brenner

  I need to set up a subversion repository with apache authentication against both an external LDAP server as well as the local Redmine database. That is, we have users whose accounts exist only in the LDAP directory and some users whose accounts only exist in the local Redmine db - all should be able to access the repo. I can't quite seem to get the apache config right for this. I know I saw a how-to for this at some point, I think using Redmine.pm, but I can't seem to find it anymore.. Thanks.

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• SQL Server tempdb size seems large, is this normal?

  - by Abe Miessler

  From what I understand the system database is used to hold temporary tables, intermediate results and other temporary information. On one of my database instances I have a tempdb that is seems very large (30GB). This database has not been modified (as in "last modified date" on the mdf file) in over a week. Is it normal to have the temp db remain that large for that long of a period? It seems to me that it should be updating fairly often and returning space that it is using fairly quickly... Am I way off here or is SQL Server doing something weird? FYI: This is a SharePoint 2010 database, not sure if that makes a difference.

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• Bind dns server in Solaris 10 and win xp clients

  - by stevecomptech

  Hi, Added this in zone db file, i am running solaris 10 _ldap._tcp.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.mydomain.com. SRV 0 0 88 dc.mydomain.com. _ldap._tcp.dc._msdcs.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.dc._msdcs.mydomain.com. SRV 0 0 88 host.mydomain.com. Now i get this error when i try to join win xp to the domain The query was for the SRV record for _ldap._tcp.dc._msdcs.mydomain.com The following domain controllers were identified by the query: host.mydomain.com Common causes of this error include: Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses. Domain controllers registered in DNS are not connected to the network or are not running. What do i need to change in order my win xp join the domain

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• replacement drive cage for power edge R710

  - by bumble_bee_tuna

  Hi I'm performance tuning a DB server its a Dell R710 there is a very significant I/O bottleneck. Unfortunately the server was purchased with the 6 x 3.5 inch sata configuration which doesn't give me the leeway I need to address the issue. Before going to DAS does anyone know if it is possible to purchase a replacement front drive enclosure ? I know the server is configurable with something like 12 or 16 2.5 inch drives and it appears to be modular ? I tired contacting dell but the offshore parts department reps are not very bright lol. Thanks.

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• Internal message system with SQL database

  - by laurens

  Hi all, I was asked to install a -rather basic- Internal message system with SQL database we could integrate with our websites. A user is logged onto the website and should then be able to go to its Inbox or outbox; of course they should be able to sent to other users. Important: It's not a smtp/pop mailserver system I'm looking for! I found something with similar functionalities with an access DB (also a possibility) http://www.planet-source-code.com/vb/scripts/ShowCode.asp?lngWId=4&txtCodeId=6859 Thanks in advance!

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• How can I change my mysql user that has all privileges on a database to only have select privileges on one specific table?

  - by Glenn

  I gave my mysql user the "GRANT ALL PRIVILEGES ON database_name.* to my_user@localhost" treatment. Now I would like to be more granular, starting with lowering privileges on a specific table. I am hoping mysql has or can be set to follow a "least amount of privileges" policy, so I can keep the current setup and lower it for the one table. But I have not seen anything like this in the docs or online. Other than removing the DB level grant and re-granting on a table level, is there a way to get the same result by adding another rule?

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• verisign certificate into jboss server SSL

  - by rfders

  i'm trying to enable jboss to uses ssl protocol using a previously generated certificate from verisign, i imported both certificate, server certificate and ca certificate into the keytore file, and i configured the server.xml to use that keystore and activate ssl protocol, then when i run the jboss, I got this error "certificate or key corresponds to the SSL cipher suites which are enabled" Question, reading some post on internet, i found that every example was made it generating a Certificate Request, it stricly necesary to do that if i already have the server certificate and that CSR has to be imported into the keystore as well ? at this point i'm very confused about this issue, i tried almost every solutions posted in several forums but till now i haven't any luck !! can you give me some tips in order to solve this problem. thanks in advance this are my keystore file: Keystore type: jks Keystore provider: SUN Your keystore contains 2 entries j2ee, Dec 29, 2009, trustedCertEntry, Certificate fingerprint (MD5): 69:CC:2D:2A:2D:EF:C4:DB:A2:26:35:57:06:29:7D:4C ugent, Dec 29, 2009, trustedCertEntry, Certificate fingerprint (MD5): AC:D8:0E:A2:7B:B7:2C:E7:00:DC:22:72:4A:5F:1E:92 and my server.xml configuration:

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• How much HDD space would I need to cache the web while respecting robot.txts?

  - by Koning Baard XIV

  I want to experiment with creating a web crawler. I'll start with indexing a few medium sized website like Stack Overflow or Smashing Magazine. If it works, I'd like to start crawling the entire web. I'll respect robot.txts. I save all html, pdf, word, excel, powerpoint, keynote, etc... documents (not exes, dmgs etc, just documents) in a MySQL DB. Next to that, I'll have a second table containing all restults and descriptions, and a table with words and on what page to find those words (aka an index). How much HDD space do you think I need to save all the pages? Is it as low as 1 TB or is it about 10 TB, 20? Maybe 30? 1000? Thanks

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• What's a good way for organizing PDF documents on windows?

  - by Ivan

  I'm looking for a good way to manage a lot of pdf documents (e.g. papers, ebooks) on windows. Ideally I'm looking for a windows version of the great mac app Yep. I've looked quite a bit and haven't found any windows app that provides and organized overview of your pdf documents. I've considered just tagging the pdf files, but there don't seem to be any apps to simply tag and search tagged files easily. I've found TaggedFrog, but the tags are kept in the app's internal DB and are associated with the filename. So if you move/rename a file it looses all its tags. In a nutshell: Is there a good windows app to organize/efficiently tag files?

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• Bind dns server in Solaris 10 and win xp clients

  - by stevecomptech

  Hi, Added this in zone db file, i am running solaris 10 _ldap._tcp.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.mydomain.com. SRV 0 0 88 dc.mydomain.com. _ldap._tcp.dc._msdcs.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.dc._msdcs.mydomain.com. SRV 0 0 88 host.mydomain.com. Now i get this error when i try to join win xp to the domain The query was for the SRV record for _ldap._tcp.dc._msdcs.mydomain.com The following domain controllers were identified by the query: host.mydomain.com Common causes of this error include: Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses. Domain controllers registered in DNS are not connected to the network or are not running. What do i need to change in order my win xp join the domain

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