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101300
2010 May 26
14
creating a fast ZIL device for $200
...ead will hit next. This might be done
by a re-mapping layer or integrated into ZFS. This works only because
ZIL device are basically write-only. Reads from this device will be
horribly slow.
I have done some testing and am quite enthusiastic. If I take a
decent SAS disk (like the Hitachi Ultrastar C10K300), I can raise
the synchronous write performance from 166 writes/s to about
2000 writes/s (!). 2000 IOPS is more than sufficient for our
production environment.
Currently I''m implementing a re-mapping driver for this. The
reason I''m writing to this list is that I''d like t...