Hello Maurilio,
Friday, April 24, 2009, 11:44:27 PM, you wrote:
ML> Hi,
ML> I've got a question about zvol blocksizes when using a zvol as
ML> backing storage for an iscsi target: is it better, speedwise, to
ML> have the blocksize set to the same value which will be used by the
ML> file system which will be created inside this iscsi target?
ML> Or is it better to set it to a high value to have some sort of
ML> reading ahead, just in case zfs does not do some reading ahead on
ML> its own (here it could be slower in writing, though)?
ML> Regards.
ML> Maurilio.
Basically you have three options:
1. Follow best practices (match block size to your fs block size)
2. Make an educated guess based on your knowledge of your environment
3. Make some benchmarking/testing with as close load as you can get to
the production one
--
Best regards,
Robert Milkowski
http://milek.blogspot.com
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