Displaying 2 results from an estimated 2 matches for "cachekit".
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2008 Feb 19
1
ZFS and small block random I/O
...any best practices, tips for
optimizing small block random I/O on ZFS, or any other documents that
might explain what we''re seeing and give us guidance on how to most
effectively deploy ZFS in an environment with heavy small block random
I/O.
The first anomaly, Brendan Gregg''s CacheKit Perl script fcachestat shows
the segmap cache is hardly used (occasionally during the IOzone random
read benchmark, while the disks are grabbing 20MB/s in aggregate, the
segmap cache gets 100% hits for 1-3 attempts *every 10 seconds*--while
all other samples are zero% for zero attempts. I don'...
2010 Oct 08
74
Performance issues with iSCSI under Linux
Hi!We''re trying to pinpoint our performance issues and we could use all the help to community can provide. We''re running the latest version of Nexenta on a pretty powerful machine (4x Xeon 7550, 256GB RAM, 12x 100GB Samsung SSDs for the cache, 50GB Samsung SSD for the ZIL, 10GbE on a dedicated switch, 11x pairs of 15K HDDs for the pool). We''re connecting a single Linux