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NTFS cluster size
Posted: Mon Apr 08, 2013 4:38 am
by imrevo
Good morning,
what NTFS cluster size should be chosen for iSCSI targets? 4K would be default, but I think I've read something about 64K being better for iSCSI targets.
bye
Volker
Re: NTFS cluster size
Posted: Mon Apr 08, 2013 12:36 pm
by jeddyatcc
64k is the suggested size, but I would really recommend testing performance. While Starwind writes in 64k blocks, I have gotten better performance using 4k or 32k block sizes on different arrays.
Re: NTFS cluster size
Posted: Wed Apr 10, 2013 10:10 am
by Anatoly (staff)
Totally agree with jeddyatcc - this should be the test based choice.
Re: NTFS cluster size
Posted: Wed Apr 10, 2013 10:29 am
by imrevo
Hi Anatoly,
Anatoly (staff) wrote:Totally agree with jeddyatcc - this should be the test based choice.
Will be done as soon as the new drive arrives
I'll keep you posted.
Already did some testing with the NTFS cluster size within a VM: No performance difference worth mentioning between 4K and 64K, base disk of the HA-Image was on a disk formatted with 4K NTFS cluster size.
bye
Volker
Re: NTFS cluster size
Posted: Mon Apr 15, 2013 8:56 am
by Anatoly (staff)
Any update here please?
Re: NTFS cluster size
Posted: Tue Apr 16, 2013 4:00 am
by imrevo
Good morning Anatoly,
Anatoly (staff) wrote:Any update here please?
I stayed with 4K as the difference between 4K, 32K and 64K has been neglectable during my tests.
bye
Volker
Re: NTFS cluster size
Posted: Thu Apr 18, 2013 4:06 pm
by Anatoly (staff)
Thanks for the heads up!