Disk Configuration For Replicated Database
Jan 25, 2008
We are going to implement either a replicated database or use log shipping to another database to support our reporting needs. Basically we are moving reporting over data off our transactional database.
With this in mind, I have several questions:
Are there any special configurations in terms of disks for a database in this situation?What are the recommended raid types?
Also, we currently store our data in one filegroup and indexes in another so obviously I'll want those on 2 separate physical disks other than the C:. What about the log files? Do I care where they go (on C: or another physical drive separate from C:, data filegroup drive and index filegroup drive)?
Thanks!
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Dec 28, 2006
hello,all
I am new to Sql 2000,I installed sql 2000 database in C disk,but Now I found my C disk space is smaller than before,So I want to move my databse(include data and structure) from C Disk to D Disk(its space is very large) .
is it possible to do it ?
if its can be done ,do I need to change my asp.net program source code (exp: chaneg my crystal report connectstring ) ?
thanks in advanced!
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Jan 3, 2008
Hello.
Please excuse the following question from a newbie to SQL.
I have been asked by our DBA to set-up a new SAN tray to cope with our company data bases.
We have an MSA1000 fibre channel that the Database Servers connect to via a Fibre link.
We have a second SAN tray attached that currently has no disks attached to it, this is the one that we are going to use for the new Database set-up.
We will be purchasing 300 GB 15k disks but the question i have is how many disks and what configuration will i need for the following scenario.
100 GB PRIMARY DATA
50 GB DATABASE LOG
100 GB SECONDARY DATA
300 GB ARCHIVE DATA
50 GB TEMP DATABASE
I have been reading as much as i can about SQL and Disk I/O and it appears on the face of it that Raid 10 would be the fastest (and most fault tolerant) for the this set-up.
If anybody has any ideas they would be gratefully received.
Thank you for your time.
Regards
Lee
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Jan 18, 2008
I have a question concerning where to put certain database files for the followinig RAID configurations. The server has 2 RAID configs: 2 hds in a RAID 1 and 4 hds in a RAID 10. The server will host 4 database instances: A replicated db, a Reporting Services db (which technically constitutes 2 db instances) and an application db.
In order to get the best performance, should I put the OS, SQL binary and log files on the RAID 1 config with the data and tempdb on the RAID 10? If not, please explain the best solution. Thank you!
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Mar 14, 2011
I have been tasked with moving our SQL server estate onto new 64bit SQL 2008 Virtual servers on a VM base. Each Virtual server will be attached to our SAN that i will have no control over. Do i ask for multiple LUNs pretending that there is a COS), Etemp), FData) and Glog) disk structure or do I just present a very big space as a single C: drive and let it go.We are consolidating lots of old physical servers onto fewer (more powerful) virtual servers (according to the VM and SAN administrators)
1. Configure your SAN properly
2. Don't overallocate shared resource
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Sep 2, 2005
Hi,
We have to move two of our servers in US hosting SQL Server 2000 database to different location. These servers are clustered using MSCS and uses SAN to store database data. The database on this cluster hosts publisher and distributor. The other two sites in Europe host updateable subscribers. We are using transactional replication. The downtime will be around 24 hours during which servers will be physically moved from one location to other. During this time we will keep the two subscribers running and let the changes queued on subscribers. I have listed following steps based on my limited knowledge of SQL Server. Could somebody please advise if this approach is valid and if I have missed any steps?
1. Make sure no users are accessing database
2. Backup database (In case of emergency need)
3. Stop snapshot, Log Reader, Queue Reader and Distributor Agents
4. Stop SQL Server Service and SQL Agent
5. Take OS backup
5. Shutdown the server
6. Ship the servers and OS backup to new location
7. Setup servers at new location and restore OS backup
8. Start SQL Server Service and SQL Agent
9. Start agents listed in step 3
Regards,
Nilesh
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May 8, 2006
I got Server A with 30 Databases and I was asked to move 30 databases to Server B…
But server A is having 2 databases as Publication and Distribution to two different servers….. and Server A is a subscription for 6 Databases from other servers….
Once I move the databases from Server A to Server B…… what is the best way to get the Replications too…. I mean Server B should have 2 Db’s as Pub & Distr and 6 Db’s as Subscription…
Is there any way I can script it out in Server A and run the same script in Server B with some modification…. so that the Replication work…..??
I have Jobs and Maintenance plans…. Which should also move from Server A to Server B…. I know using DTS...... is there any better way..??
Please some one give me ur suggestion on this…
Thanks
Bob
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Mar 3, 2004
I have a database A on server_1 that is being merge replicated to database B on server_2 which is production a box
NOW
I want to restore database A on server_3 that is being merge replicated to database B on Server_4 which is test box.
How about do I do that with replication being involved?
Thanx
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Apr 26, 2003
How can I do an alter table in some table that replicated database ?
I got the error message when I try !
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Jul 5, 2006
Hi, I have setup a merged replication on two server. Server A contains the Publisher and the Distributor database and Server B contains Subscriber.
If the database at the Subscriber got corrupted. I am thinking maybe i can 'restore' the subscriber database by resynchronising the data from the publisher to subscriber.
But what happen if the Publisher database failed? How should one restore the publisher database and then restore the replication setup?
What will be a good backup/restore strategy for such a setup?
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Jul 31, 2006
I have a table that was set up with a primary key - that i need to change. The problem is that the database is being replicated to a remote location, and will not allow me to remove or change the primary key on a published database.
Due to the size of the database and bandwith limitations it is not an option to re-initialise the published database.
Is there any to do this without breaking replication
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Apr 6, 2004
Is there a way to move a SQL replicated database from one server to another without dropping the publication?
I have SQLCE setup with SQL server 2000; I want to redo the server but needs to move my replication to a temp server and then back.
The problem is that I do not want to drop my subscription and recreate it…it needs to stay the same.
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Jul 23, 2005
Can someone lend some assistance in this? It sounds like it should beable to be done.We have a large replicated database in SQL 2000. We need to move themdf and ldf files to a location on another drive.Will doing this affect or break replication in any way? Is there anyway to prevent this?Thanks in advance.Glenn DekhayserVoyant Strategies
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Jul 20, 2005
When I try to remove a table, it complains because it's part of apublication. I could script the publication and subscriptions suchthat they can be deleted, the table removed, and then added again.But, I not sure if this is the 'best' approach.Anyone faced this challenge before?Regards,gary
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Oct 5, 2006
Hi All,
I have SQL server 2005 Database which is having following Replication stuff.
1. 6 merge Subscribers
2. 5 Snapshot Subscribers (Push Susbribers)
3. 3 Transactional Publisher
Due to the Performance Issue, there is need to move SQL server from the Current Server to an Higher End Server.
I want to keep all the Replication settings after movement of the Database. Can anyone tell me how to acheive this requirement?
Is there a possibility to keep the Replication settings ? Even we can have the Same System Name to the New Server.
Awaiting response...
Thanks,
Thams.
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Nov 27, 2002
I'm a novice with replication and am in need of direction on how to restore replicated databases. Server A replicates 5 databases to server B using transactional replication. Server A also contains the distribution database. I'm perfoming PUSH replication.
The development area asked me to restore Server A with a copy of production data located on server C. After I restored the data from C to A, I noticed that server A was no longer published. Is this normal?
I re-published the 5 databases, but noticed that the Log Reader Agent has now been running for 2 hours. I'm trying to give myself a crash course in replication, but am coming up empty regarding (1) the prefered method for restoring replicated databases and (2) determining why the Log Reader Agent is taking so long.
Any suggestions?
Thanks, Dave
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Jul 14, 2014
I have a production database which uses merge and snapshot replication. The Merge is for 3 tables. The snapshot is to update the rest of the data once daily. I use a Full recovery model and perform database backups (full, differential) and transaction log backups.
I have a database optimization plan which runs 4 times a week. This plan performs and integrity check and rebuilds the indexes. This optimization plan is growing the transaction log by about 8MB each time it is run and we are running out of space on the drive for our log files. The space is not being reused.
I saw in another post where Gail Shaw suggesting using SELECT name, log_reuse_wait_desc FROM master.sys.databases to see why the log space is not being reused. On the database in question, the above returns "REPLICATION".
A colleague tried to backup the transaction log a couple of times to truncate the log this weekend. She was going to perform a DBCC Shrinkfile command afterwards. But the truncate failed. Again looking into things it seems replication prevented the truncation.
We are looking at stopping the merge replication or even removing it to truncate the log file and then recreate the merge replication. How to handle shrinking the log file for now and then seeing if there are any checks or changes I can perform which will allow the transaction log space to be reused.
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May 1, 2006
Hi
I often deal with a problem when replicated database is down due to
electric outage or any other scheduled type of downtime. Primary
database is up but distribution agent is going down 'after 10 attempts
to connect to replicated database'. That's the problem I think because
not only distribution agent goes in undetermined state and I have to
restart sqlagent service, but I need to go through whole process of
snapshot and applaying it to replicated db. I would like it to
accumulate transactions in distribution database and once replicated db
is up - distribute them.
I wonder if anybody can tell me how to configure distribution thread so
it does not go down after 10 unsuccessfull attempts but stays for day
or two.
Thank you, Gene.
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Jun 27, 2007
How can I list all of the Subscriptions in a CE Database that was created with the .Net System.Data.SqlServerCe.SqlCeReplication.AddSubscription method?
After I create the CE database in an sdf file, I can connect to it with SQL Servr Mgmt Studio, then see the list of Subscriptions in the Object TreeView, under "Replication"
But I can't find that Subscription list in any properties or methods of System.Data.SqlServerCe.SqlCeReplication or System.Data.SqlServerCe.SqlCeConnection
Should I be looking in RMO features like Microsoft.SqlServer.Replication??
We want to confirm that a local CE database was last synced from the expected SQL Server database by checking the Publisher property of each subscription in the CE database.
Thanks
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Jun 18, 2007
Hi,
I have transactional replication set up on a DB and run database maintenance scripts (index defrag, update stats, etc) on this DB daily.
Will the maintenance job/scripts also be propagated to the replica (subscriber) causing these maintenance operations to be performed on the replica OR do I need to create separate jobs on the replica DB (subscriber) also? I'm guessing the latter but wanted to verify to make sure I wasn't missing something. Thanks!
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Nov 4, 2006
I'm trying to replicate a table(s) in access 2000 to MS SQL server 2000/2005 programatically on a timed instance and then have these tables merged in SQL to create one table.
Any guidance appreciated.
Thank you,
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Feb 20, 2007
Hi, My server went dead(problems with the hard disk), but I have a copy of the whole sql server directory including the database in a external hard disk. I have a new server now and I would like to copy this database (with the reports from reporting services too) from the external hard disk to my new server. can anybody help me please? Thanks.
Note : I have a plain copy of all the sql server directory with all the files including the database not a SQLServer backup done with the wizards.
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Jun 29, 2015
I have a publisher database set up for a merge replication. This is using parameterized filter with join filters.
I also have a stored procedure that does deletes & inserts on the table where the parameterized filter is applied to aid in changing a subscriber's eligibility to receive so and so data. I have observed that running the stored procedure takes extraordinarily long and as a result, the log file grows to a size 1.5 - 2.5 times the database size.
At first I reasoned that this might because I had it set up to use precomputed partitions and changing it requires recalculating the partitions. As a test, I turned off the precomputed partitions. Didn't work. I turned on "optimize synchronization" AKA "keep_partition_changes", which normally is not available when you have precomputed partition on, and that didn't work, either.
At this point, I think I can rule out precomputed partitions being a problem here but I'm stumped now what else I should do to reduce the amount of log writes being required. We do need the parameterized filters & join tables, so that can't go.
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Jan 8, 2006
Hi,
I'm trying to get my first replication going, and I have set up a database successfully, along with merge replication, however when I attempt to create the first subscriber, I get a permissions issue, regardless of what I do. In the SQLCESA30.LOG file, I get the following entries:
2006/01/07 16:59:36 Hr=00000000 SQLCESA30.DLL loaded 0
2006/01/07 16:59:58 Hr=80004005 ERR:OpenDB failed getting pub version 28627
I posted the initial thread under the "Replication" forum, but am including this 'pointer' post here due to a lack of replies there, and the relevance of this thread to this forum. Please see http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=193693&SiteID=1 for more details.
Thanks.
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Sep 10, 2007
If I return the Average, Minimum, and Maximum values for the counter Physical Disk: Avg. Disk Queue Length, and those values are 10, 0, 87 respectively, which value do I use to compute the Avg. Disk Queue Length for a 4 disk array(RAID 10): Average, Minimum, or Maximum? The disk(lun) is on a SAN.
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Nov 13, 2007
-- Initialize Control Mechanism
DECLARE@Drive TINYINT,
@SQL VARCHAR(100)
SET@Drive = 97
-- Setup Staging Area
DECLARE@Drives TABLE
(
Drive CHAR(1),
Info VARCHAR(80)
)
WHILE @Drive <= 122
BEGIN
SET@SQL = 'EXEC XP_CMDSHELL ''fsutil volume diskfree ' + CHAR(@Drive) + ':'''
INSERT@Drives
(
Info
)
EXEC(@SQL)
UPDATE@Drives
SETDrive = CHAR(@Drive)
WHEREDrive IS NULL
SET@Drive = @Drive + 1
END
-- Show the expected output
SELECTDrive,
SUM(CASE WHEN Info LIKE 'Total # of bytes : %' THEN CAST(REPLACE(SUBSTRING(Info, 32, 48), CHAR(13), '') AS BIGINT) ELSE CAST(0 AS BIGINT) END) AS TotalBytes,
SUM(CASE WHEN Info LIKE 'Total # of free bytes : %' THEN CAST(REPLACE(SUBSTRING(Info, 32, 48), CHAR(13), '') AS BIGINT) ELSE CAST(0 AS BIGINT) END) AS FreeBytes,
SUM(CASE WHEN Info LIKE 'Total # of avail free bytes : %' THEN CAST(REPLACE(SUBSTRING(Info, 32, 48), CHAR(13), '') AS BIGINT) ELSE CAST(0 AS BIGINT) END) AS AvailFreeBytes
FROM(
SELECTDrive,
Info
FROM@Drives
WHEREInfo LIKE 'Total # of %'
) AS d
GROUP BYDrive
ORDER BYDrive
E 12°55'05.25"
N 56°04'39.16"
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Nov 15, 2006
Hello,
I am trying to setup a test cluster and am having an issue. When I try to create the resource of a physical disk it takes both the drive e: and drive q: and doesn't seperate them into two physical disks as resources. This means when I try to associate the quorum disk it links the to physcial disk resource of drive e and q. Then when I try to install SQL2k5 I get the warning about installing SQL on the quorum disk. Am I missing something? Is there a way to seperate e and q onto two physical disk resources so I can specifically associate the quorum to q and the sql to e or should I be setting the quorum disk to a majority node set? Thanks in advance.
John
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Feb 20, 2001
Hello,
this is my configuration :
1) 3 disks in RAID5 that hold the SQL data
2) 1 disk in RAID0 that holds the only paging file.
What will happen to the SQL data (DB) when the disk that holds the paging file crashes?
Kindest regards,
Luc.
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Dec 7, 2003
I have my little MSDE on my computer. I can add and delete stuff from it through Web Matrix. My question is, where exactly is the database stored in Windows?? Also, say I wanted to copy it to a disk so I could show it to someone else, what file(s) would I need to copy?
The reason why I ask is because I have been doing a website as a project and we have to hand in all files on a disk. Getting all the .aspx & .ascx and the .config file is easy, but the database & stored procedures is proving tricky to find.
Thanks
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Dec 3, 2007
Hi All,
One of the drives that stores the database file is close to running out of space. The chance of me getting more space added to this drive any time soon are really low. What are other options I have?
Thanks.
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Jun 7, 2006
I want to move 2 databases to another physical disk. They are both single file databases. It looks like a fairly straigtforward attach and detach procedure, but I have a couple of questions:
The log files (.ldf) currently reside on a separate physical disk from the data files, if I attach and reattach the data files will the logs remain where they are by default or do I have to re specify there location?
Is there any advantage to running the update statistics portion of the sp_detach_db?
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Dec 3, 2007
Hi All,
One of the drives that stores the database file is close to running out of space. The chance of me getting more space added to this drive any time soon are really low. What are other options I have?
Thanks.
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May 16, 2007
Hi there
It is obvious that putting multiple database files on different physical disk is better for performance, but what about splitting the data on different files on the same disk?
I have got a database of about 20GB and only a single data file. will I benefit from splitting this file to multiple files on the same disk?
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