https://sigtar.com/tags/compression/ Recent content in Compression on sigtar.com Hugo en-nz Wed, 19 Aug 2009 00:00:00 +1200 https://sigtar.com/2009/08/19/zfs-compression-and-latency/ Wed, 19 Aug 2009 00:00:00 +1200 https://sigtar.com/2009/08/19/zfs-compression-and-latency/ <p>Since im using ZFS as storage via NFS for my some of my vmware environments i need to ensure that latency on my disk is reduced where ever possible.</p> <p>There is alot of talk about ZFS compression being &ldquo;faster&rdquo; than a non-compressed pool due to less physical data being pulled off the drives. This of course depends on the system powering ZFS, but i wanted to run some tests specifically on latency. Throughput is fine in some situations, but latency is a killer when it comes to lots of small reads and writes (in the case of hosting virtual machines)</p> https://sigtar.com/2009/01/30/zfs-compression-types/ Fri, 30 Jan 2009 00:00:00 +1300 https://sigtar.com/2009/01/30/zfs-compression-types/ <p>ZFS compression as of OpenSolaris 2008.11 has a few types to choose from.</p> <p>lzjb (default) | gzip | gzip-[1-9]</p> <p>They are used via the <strong>zfs set compression=gzip</strong> <em><strong>poolname</strong> command.</em></p> <p>The following test was quickly done out of personal interest - and is in no way scientific!</p> <p>I have a AMD cpu with 3 cores (2.4Ghz). The data i copied to each of the shares consisted of video / documents / pictures and music. The first test i have done is based on compression only (i have not measured throughput)</p>