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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Is It Possible To Move My Sql 2000 Database (in C Disk) To Another Disk (Disk) ?

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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SQL Disk Configuration Question

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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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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1. Configure your SAN properly

2. Don't overallocate shared resource

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Sep 2, 2005

Hi,
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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
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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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NOW

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How about do I do that with replication being involved?

Thanx

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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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Due to the size of the database and bandwith limitations it is not an option to re-initialise the published database.
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Apr 6, 2004

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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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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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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?

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Any suggestions?

Thanks, Dave

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Jul 14, 2014

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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



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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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Thank you,

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Feb 20, 2007

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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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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
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) AS d
GROUP BYDrive
ORDER BYDrive

E 12°55'05.25"
N 56°04'39.16"

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Kindest regards,
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