On Oct 16, 2007, at 4:36 PM, Jonathan Loran wrote: > > We use compression on almost all of our zpools. We see very little > if any I/O slowdown because of this, and you get free disk space. > In fact, I believe read I/O gets a boost from this, since > decompression is cheap compared to normal disk I/O.
Same here. For our workload (many writes, relatively few reads), we saw at least a 5x increase in performance (says a developer offhandedly when I ask him) when we enabled compression. I was expecting a boost, but I recall being surprised by how much quicker it was. I have not enabled it everywhere, just in specific places where disk I/O is being contended for, and CPU is in abundance. -- bda cyberpunk is dead. long live cyberpunk. http://bda.mirrorshades.net/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
