On Tue, 2010-06-15 at 07:36 -0700, Richard Elling wrote:
> > What I want to achieve is 2 GB/s+ NFS traffic against our ESX clusters
> > (also InfiniBand-based), with both dedupe and compression enabled in ZFS.
>
> In general, both dedup and compression gain space by trading off performance.
> You should take a closer look at snapshots + clones because they gain
> performance by trading off systems management.
It depends on the usage. Note that for some uses, compression can be a
performance *win*, because generally CPUs are fast enough that the cost
of decompression beats the cost of the larger IOs required to transfer
uncompressed data. Of course, that assumes you have CPU cycles to
spare.
-- Garrett
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