Question

SQL 2008 data directories

Asked by: davorin

Hi,
I'm setting up separate server for SQL 2008 x64 (first one is SBS2008).
Current disk configuration is three logical drives (C:, D:, E:) - each on separate RAID1 array. (Together 6 disks). OS is installed on C: partition.
I'm planing to use partition D: for database, partition e: for logs and partition c: for TempDB and sql backup directory. At the moment total size of DB and logs is 30GB and SQL server will be used by 20 users.
Am I on the right path or should I consider some other configuration and why?
For SQL services I plan to use system account...

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Asked On
2009-11-03 at 15:03:50ID24869264
Tags

sql 2008

,

data

,

log

Topics

SQL Server 2008

,

Windows Server 2008

Participating Experts
2
Points
500
Comments
9

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Answers

 

by: CGLuttrellPosted on 2009-11-03 at 15:09:16ID: 25734916

I am leary of using c: for the sql backup directory, because depending on what your backup maintenance plan is and how long you may need to keep backups and the number of databases you may end up with, that could eventually take up all/too much space on the c: drive where the OS is and that causes the worst problems.  I have seen this happen when not monitored properly.

 

by: davorinPosted on 2009-11-03 at 15:35:17ID: 25735078

Thanks for your reply.
Actual size of backup directory is 8GB. It contains only backup of esential databases for two days.
Free space on drive c: is cca. 100GB. But I will take your suggestion into account. It would be better to place it on d: or e:?

 

by: aneeshattingalPosted on 2009-11-03 at 15:35:40ID: 25735081

Raid1 C:\ : OS, SQl Server Installation , windows page
            D: \ : all the datafiles
            E:\ all the ldfs and tempdb

 

by: CGLuttrellPosted on 2009-11-03 at 15:37:06ID: 25735091

I would place it them on e: in your case, opposite the datafiles on d:.

 

by: aneeshattingalPosted on 2009-11-03 at 16:11:33ID: 25735292

CGLuttrell,

Just curious,  whats the benefit by doing that

Aneesh

 

by: davorinPosted on 2009-11-03 at 16:15:44ID: 25735315

aneeshattingal:
Can you shortly explain why also tempbd on e: (it is also a big load for disk system)?
log files writes in sequence and are quite a big load for disk.
I think c drive is least used - that is why I was planing to put there tempdb files.
Am i wrong?

 

by: CGLuttrellPosted on 2009-11-03 at 16:20:47ID: 25735329

Annesh,
I was suggesting above that they not put the backup directory on c: to keep from possibly filling it and causing problems for OS and SQL Server and that between d: with the datafiles and e: with the log files, I would chose e: drive.

 

by: aneeshattingalPosted on 2009-11-03 at 16:24:18ID: 25735347

i prefer untouching the c:\ drive in that way windows pages can grow as it like..
on tempdb performance read this  http://msdn.microsoft.com/en-us/library/ms175527.aspx
**create one data file for each CPU on the server (accounting for any affinity mask settings) and then adjust the number of files up or down as necessary
that means all the sequential files in the same drive

 

by: davorinPosted on 2009-11-04 at 10:22:24ID: 31649709

Thanks for your answer.
You both prefer to leave c: partition only for OS.
But I have configured data locations like follows:
c: tempdb
d: data
e: logs + backup
I will monitor how big is performance impact on separate RAID arrays. I'm just a little bit sorry that I have not devided the first RAID1 array into two partitions...
Well, there is allways next time ;)

20120131-EE-VQP-002

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