I think what you define IS dedup. You can search the archieves for dedup.
Best regards Mertol Sent from a mobile device Mertol Ozyoney On 17.Kas.2008, at 18:51, BJ Quinn <[EMAIL PROTECTED]> wrote: > We're considering using an OpenSolaris server as a backup server. > Some of the servers to be backed up would be Linux and Windows > servers, and potentially Windows desktops as well. What I had > imagined was that we could copy files over to the ZFS-based server > nightly, take a snapshot, and only the blocks that had changed of > the files that were being copied over would be stored on disk. > > What I found was that you can take a snapshot, make a small change > to a large file on a ZFS filesystem, take another snapshot, and > you'll only store a few blocks extra. However, if you copy the same > file of the same name from another source to the ZFS filesystem, it > doesn't conserve any blocks. To a certain extent, I understand why > - when copying a file from another system (even if it's the same > file or a slightly changed version of the same file), the filesystem > actually does write to every block of the file, which I guess marks > all those blocks as changed. > > Is there any way to have ZFS check to realize that in fact the > blocks being copied from another system aren't different, or that > only a few of the blocks are different? Perhaps there's another way > to copy the file across the network that only copies the changed > blocks. I believe rsync can do this, but some of the servers in > question are Windows servers and rsync/cygwin might not be an option. > -- > This message posted from opensolaris.org > _______________________________________________ > 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
