I see no correlation between "netapp optimization" and local ext3
storage, really.
If you using LVM/NFS, all data will be aligned. VHD format use bitmap
headers before every 2Mb of data, it takes about 512 bytes, but other
1488 are simply skipped, so data will align 4k boundary.
On 25.11.2012 17:40, Jonathon Royle wrote:
At work I am having lots of discussion on block alignment with
NetApp. As I read various forums there is lots of advice on
checking/fixing block alignment however it appears to be very VMware
focused. I note Win 2008 R2 and Centos 6 automatically start
partitions at 4k block boundaries but Centos 5 does not.
So my key Q is – as XCP uses Centos 5 as Dom0 and is therefore not
block aligned is there a performance hit in using local ext3 storage
repositories (my reading suggest LVM SRs should not be impacted)? If
yes is there a way to avoid/correct this?
Regards,
Jon
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