> i think i have read somewhere that zfs gzip > compression doesn`t scale well since the in-kernel > compression isn`t done multi-threaded. > > is this true - and if so - will this be fixed ?
If you're writing lots of data, zfs gzip compression might not be a good idea for a desktop machine, because it completely kills interactive performance. See this thread: http://www.opensolaris.org/jive/thread.jspa?messageID=118116𜵤 http://mail.opensolaris.org/pipermail/zfs-discuss/2007-May/thread.html#27841 It does compress (scale) on up-to 8 cpu cores, though. See "zio_taskq_threads" in usr/src/uts/common/fs/zfs/spa.c > what about default lzjb compression - is it different > regarding this "issue" ? lzjb doesn't consume that much kernel cpu time (compared to gzip), so the machine remains more or less usable for interactive usage. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
