[Dovecot] DoveCot compression to save HDD space
dp at eng.sun.com
Thu Feb 15 08:01:44 UTC 2007
On Thu 15 Feb 2007 at 08:55AM, Host Expert wrote:
> Ok, thanks for comments.
Note also that Apple is including ZFS in the next generation of MacOS,
so Solaris will not be your only choice.
> How effective is ZFS ? I mean yeah, even Windows has file system
> compression... And what ? Is very poor...
You've not said how much performance you are willing to trade for
The compression currently in ZFS is a variant of Lempel-Ziv with some
tweaks. This has the advantage of being fast and compresses moderately
well; for the curious, see
In my personal experience, it is lightweight enough that it's hard
to know it is present without benchmarking. And as I said before, it
has the curious property of *accelerating* some workloads.
Adam Leventhal has done most of the work to include GZIP compression in
ZFS, and we expect to see him check that in sometime "soon"; see
http://blogs.sun.com/ahl/. The issue with GZIP is that it's not as
fast. The good news is that you will be able to choose-- and since
everything is an online operation, it's not too hard to switch things
back and forth.
I fear that we are running the risk of hijacking this mailing list
to talk about ZFS :) You may want to check out
zfs-discuss at opensolaris.org and/or google for "zfs".
Daniel Price - Solaris Kernel Engineering - dp at eng.sun.com - blogs.sun.com/dp
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