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VMWare , use multiple volumes and datastores for vcenter and SQL?

Posted on 2013-11-24
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Last Modified: 2013-12-30
Is it best practice to have vcenter and the SQL database files and the database logs all on separate volumes?

I need to show a co worker evidence of this best practice do you have a link?


 thanks
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Question by:NAMEWITHELD12
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Expert Comment

by:RickEpnet
ID: 39673353
How many VMware hosts do you have?
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by:NAMEWITHELD12
ID: 39673383
16

thanks
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by:Gareth Gudger
Gareth Gudger earned 400 total points
ID: 39673390
This is more of a SQL best practice than a VMware one. If possible it is best practice to keep the logs and databases on separate drives.
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Author Comment

by:NAMEWITHELD12
ID: 39673400
what about separate volumes or datastrores? is there any reason not to do this?
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Expert Comment

by:Gareth Gudger
ID: 39673410
Are you using local storage or shared storage?
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by:RickEpnet
RickEpnet earned 400 total points
ID: 39673449
When it says drive is mean different spindles. If you have a raid 5 with 3 drives on it. It is not really going to make much of a difference if you put them on separate drives the big difference comes in then you put them on different set of spindles. You want your data abd logs on the fastest set of drive. Separate is better.

So if you have 2 volumes that are on different raid sets that would be best.
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Author Comment

by:NAMEWITHELD12
ID: 39673464
this will be on a netapp san. So what I am going to go with is 3 separate sets of  spindles

1. for the C drive of the SQL spindle set 1

2. for the DB files D: drive spindle set 2

3. for the DB  log files E: drive spindle set 3
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Expert Comment

by:RickEpnet
ID: 39673731
In this case I do not think it is needed but you can put the Temp DB on another drive too.

Your Plan looks good.
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Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 400 total points
ID: 39673900
If you consult SQL DBAs and SQL Circles, they will advise to do this, but if you have a SAN, which all volumes and LUNs are on the same spindles, difficult todo, and these recommendations were in the days, when we did have SAN volumes spanning hundreds of spindles.
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Assisted Solution

by:robocat
robocat earned 400 total points
ID: 39673939
From a data recovery viewpoint, you should put database and logfiles onto different volumes, especially if you plan to use Netapp Snapmanager for SQL. This way, you can restore the database volume from a snapshot without losing the logfiles (needed for recovery).

If you're really paranoid, you can put the database and log volumes on different aggregates, allowing a full recovery up to the last database transaction, even if you lose an entire aggregate. In a vcenter context, this is not necessary because the vcenter database is not that critical.
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compdigit44 earned 400 total points
ID: 39679521
In regards to SQL it is best to reseperate the server drives like the following example:
c:\ = OS
d:\ = Application Install Dir
e:\ = DB Files
f:\ = Log Files
G:\ = Backup
H:\  = Page Files

For the datastore try to break up your volume into high, medium and low IOPS usage.
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