Click here to monitor SSC
SQLServerCentral is supported by Red Gate Software Ltd.
 
Log in  ::  Register  ::  Not logged in
 
 
 
        
Home       Members    Calendar    Who's On


Add to briefcase

SAN LUNs and disk striping Expand / Collapse
Author
Message
Posted Thursday, June 20, 2013 6:43 AM
Forum Newbie

Forum NewbieForum NewbieForum NewbieForum NewbieForum NewbieForum NewbieForum NewbieForum Newbie

Group: General Forum Members
Last Login: Tuesday, July 16, 2013 8:43 AM
Points: 2, Visits: 10
Hello all,

I was wondering if something that we do (as suggested by our partners) with HP-UX and Progress and Oracle databases is coherent and applicable to a SQL Server installation.
We have an HP EVA6400 storage to deploy LUNs to all our DBs, VMs and stuff. It is an easy to use storage system, that uses all disks in the disk group at the same time for every LUN created. Easier to create and present LUNs, but lacks the fine grain that other storages have -- like, choosing _exactly_ disks 1, 2, 3, 4 and 5 to create a RAID 5, for instance.
What we do in HP-UX is create 4 LUNs for each mount point and striping them with LVM, creating one volume, and using multipath I/O. It's been like this since the first SAN deployed here, in 2007, but I've never made any benchmarks myself to see if it the performance indeed improves.
But I've never seen this in the Windows world, not even found any documents stating if it is a good thing or not.

Anyone has any thoughts?

Thanks!
Post #1465653
Posted Sunday, June 23, 2013 7:37 PM


SSCertifiable

SSCertifiableSSCertifiableSSCertifiableSSCertifiableSSCertifiableSSCertifiableSSCertifiableSSCertifiableSSCertifiable

Group: General Forum Members
Last Login: Today @ 1:26 PM
Points: 5,961, Visits: 12,847
You're carving LUNs from the same set of physical disks, which is not best for performance. Having said that, it depends on how the cache is configured and how good the storage network is .

-----------------------------------------------------------------------------------------------------------

"Ya can't make an omelette without breaking just a few eggs"
Post #1466556
« Prev Topic | Next Topic »

Add to briefcase

Permissions Expand / Collapse