Hi Robbie,
On Mon, Jan 30, 2012 at 1:15 PM, Robbie Crash <sardonic.smi...@gmail.com> wrote: > If you want to use Fletcher, you need to use verify, as the likelihood of > collisions is increased since Fletcher is not *random*. You don't really > need to verify when using SHA256, and by default, SHA256 is used with > dedup, not Fletcher. . More information about the checksumming and > trade-offs can be found here: > http://blogs.oracle.com/bonwick/entry/zfs_dedup That blog post is slightly dated. While it does explain dedup, the option of using "fletcher,verify" has been removed about two years ago. > What Gary said regarding the recompression is accurate if all you're > storing is compressed images, like jpegs. If you're storing raw photo data, > you may see significant savings by using compression. I have enough storage space now, that I will make a 2nd filesystem with "compression=on", copy the files over, and see if I save more than about 5-10%. If not (I'm not sure how compressed Canon's raw image files are), I won't bother. Thanks, Jan _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
