Le 22 oct. 08 à 21:02, Bill Sommerfeld a écrit : > On Wed, 2008-10-22 at 09:46 -0700, Mika Borner wrote: >> If I turn zfs compression on, does the recordsize influence the >> compressratio in anyway? > > zfs conceptually chops the data into recordsize chunks, then > compresses > each chunk independently, allocating on disk only the space needed to > store each compressed block. > > On average, I'd expect to get a better compression ratio with a larger > block size since typical compression algorithms will have more > chance to > find redundancy in a larger block of text. >
With gzip yes, but with default compression, I believe lzjb is looking for short 'repeating byte pattern'. It should not depend much on recordsize. -r > as always your mileage may vary. > > - Bill > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
