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Moving to a SAN, but the sizing concept doesn't sound right....


Moving to a SAN, but the sizing concept doesn't sound right....

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GilaMonster
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Whoever designed that is making the standard mistake of specing for space, not performance. Grab a copy of 'Troubleshooting SQL Server' by Jonathan Kehayias and check out chapter 2 where he discussed this mistake and the consequences thereof (free download from RedGate or buy paper from Amazon)

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
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SQLRNNR
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Elliott Whitlow (12/7/2011)
SQLRNNR (12/7/2011)
The local drive is far to small (Server 2008 R2 for instance will chew up most of that 50GB for just the OS).
Not sure I agree with that.. I would expect 50GB to be about right, provided that NO system databases are allowed on the OS drives, which is my policy. I have quite a few installs of SQL 2008R2 on Win 2008R2 and I expect the base install with required components AND the components of SQL that must be installed on C: to use up right about 20GB + the page file.. I have seen this over and over again.. And I still have sufficient space for SPs of the OS..

CEWII


Hmmm. Odd, our installs were consistently 35-38GB. Granted still enough space on a 50GB drive.



Jason AKA CirqueDeSQLeil
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Posting Performance Based Questions - Gail Shaw

SQLRNNR
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GilaMonster (12/8/2011)
Whoever designed that is making the standard mistake of specing for space, not performance. Grab a copy of 'Troubleshooting SQL Server' by Jonathan Kehayias and check out chapter 2 where he discussed this mistake and the consequences thereof (free download from RedGate or buy paper from Amazon)


Great resource (the book too).



Jason AKA CirqueDeSQLeil
I have given a name to my pain...
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Posting Performance Based Questions - Gail Shaw

Elliott Whitlow
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SQLRNNR (12/8/2011)
Elliott Whitlow (12/7/2011)
SQLRNNR (12/7/2011)
The local drive is far to small (Server 2008 R2 for instance will chew up most of that 50GB for just the OS).
Not sure I agree with that.. I would expect 50GB to be about right, provided that NO system databases are allowed on the OS drives, which is my policy. I have quite a few installs of SQL 2008R2 on Win 2008R2 and I expect the base install with required components AND the components of SQL that must be installed on C: to use up right about 20GB + the page file.. I have seen this over and over again.. And I still have sufficient space for SPs of the OS..

Hmmm. Odd, our installs were consistently 35-38GB. Granted still enough space on a 50GB drive.
Hmm, not sure what to tell you do you guys install a lot of extra software? Use really big page files? Have extra install binaries left on C? Kind of running short on ideas here..

As an aside I have an R2 running Hyper-V fitting fully onto a 32GB SSD for a test machine.

CEWII
LutzM
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GilaMonster (12/8/2011)
Whoever designed that is making the standard mistake of specing for space, not performance. Grab a copy of 'Troubleshooting SQL Server' by Jonathan Kehayias and check out chapter 2 where he discussed this mistake and the consequences thereof (free download from RedGate or buy paper from Amazon)


Excellent book (just finished a quick scan of chapter 2, will reread it in detail)! Thank you for the link!
And I agree, it seems like our vendor will focus on space mainly. Unfortunately, I'm "just a production guy" who's not supposed to have any voice regarding hardware spec. They think.

So I might need to focus on "hard facts" by testing the he** out of the SAN (after a lot more reading, of course)...



Lutz
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Here's another great resource by Brent Ozar that may get you on track tackling potential problems with san configurations for sqlserver
http://www.brentozar.com/sql/sql-server-san-best-practices/

Johan


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LutzM
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ALZDBA (12/8/2011)
Here's another great resource by Brent Ozar that may get you on track tackling potential problems with san configurations for sqlserver
http://www.brentozar.com/sql/sql-server-san-best-practices/


Yup, that's my first source. Now that Gail pointed me to Jonathans book, the number of sources just doubled :-)



Lutz
A pessimist is an optimist with experience.

How to get fast answers to your question
How to post performance related questions
Links for Tally Table , Cross Tabs and Dynamic Cross Tabs , Delimited Split Function
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