On Thu, May 11, 2006 at 12:34:45PM +0100, Darren J Moffat wrote: > Where does the 12.5% compression rule in zio_compress_data() come from ? > Given that this is in the generic function for all compression > algorithms rather than in the implementation of lzjb I wonder where the > number comes from ?
Where all hard-coded numbers come from: our ass. Seriously, though, the idea was that you don't want to waste time with decompression if you didn't get anything out of compression. And if I remember right, the compression aborts if it finds itself taking up more than 87.5%. But, you're right - this should be, at the very least, a tunable. Preferably, a per-compression algorithm tunable. Would you mind filing an RFE/bug as you see fit? --Bill _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
