SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


File Allocation Unit Size and Partition Alignment


File Allocation Unit Size and Partition Alignment

Author
Message
Cois
Cois
SSC Rookie
SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)

Group: General Forum Members
Points: 30 Visits: 38
There is of course another dimension to consider after you have created your LUNs and exposed them to your
SQL Box, which is the Partition alignment and File Allocation Unit (Cluster) size to be used in formatting the drive.
Have a look at the following documentation on SQL Server 2008, and SQL for some insight: http://msdn.microsoft.com/en-us/library/dd758814.
A Cluster size of 64KB is normally fine for use with SQL Server.
jasonmorris
jasonmorris
SSC-Addicted
SSC-Addicted (460 reputation)SSC-Addicted (460 reputation)SSC-Addicted (460 reputation)SSC-Addicted (460 reputation)SSC-Addicted (460 reputation)SSC-Addicted (460 reputation)SSC-Addicted (460 reputation)SSC-Addicted (460 reputation)

Group: General Forum Members
Points: 460 Visits: 1529
Remember Windows 2008 does partition alignment for you ;-)
Rudyx - the Doctor
Rudyx - the Doctor
SSCarpal Tunnel
SSCarpal Tunnel (4.8K reputation)SSCarpal Tunnel (4.8K reputation)SSCarpal Tunnel (4.8K reputation)SSCarpal Tunnel (4.8K reputation)SSCarpal Tunnel (4.8K reputation)SSCarpal Tunnel (4.8K reputation)SSCarpal Tunnel (4.8K reputation)SSCarpal Tunnel (4.8K reputation)

Group: General Forum Members
Points: 4751 Visits: 2503
Since we are talking about the 'right' things to do for your SAN disks on SQL Server let us not forget to check with you specific SAN manufacturer's best practices/whitepapers as well. Their unique information combined with Microsoft's can create one screaming SAN. LUN sizes, number of disks, SAN stripe or block sizes all contribute to this and usually are specific to the SAN manufacturer. Oh, let us not forget the technical specs on your HBAs as well ... maximum queue depth, read/write buffering and percentage of read/write activity all by drive letter (system DBs, application DB data, application DB log and tempdb) !

Regards
Rudy Komacsar
Senior Database Administrator

"Ave Caesar! - Morituri te salutamus."
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search