Eric, > > On Jan 10, 2008, at 4:50 AM, Łukasz K wrote: > >> Hi >> I'm using ZFS on few X4500 and I need to backup them. >> The data on source pool keeps changing so the online replication >> would be the best solution. >> >> As I know AVS doesn't support ZFS - there is a problem with >> mounting backup pool. >> Other backup systems (disk-to-disk or block-to-block) have the >> same problem with mounting ZFS pool. >> I hope I'm wrong ? >> >> In case of any problem I want the backup pool to be operational >> within 1 hour. >> >> Do you know any solution ? > > If it doesn't need to be synchronous, then you can use 'zfs send -R'.
The prior statement could lead one to believe that 'zfs send -R' is asynchronous replication, which it is not. The functionality ZFS provides via send/recv is known as time-fixed, or snapshot replication. Here, a non-changing data source, the snapshot, is synchronized from the source to destination node based on either a full or differential set of changes. Unlike synchronous or asynchronous replication, where data is continuously replicated in a write-order consistent manner, time-fixed replication is discontinuous, often driven by taking periodic snapshots of the changing data, performing the differential synchronization of the non-changing source data to the remote host, then waiting until the next interval. The most common problem with time-fixed replication is trying to determine, or calculate the periodic interval to use, since its optimal value is based on many variables, most of which are changing over time and usage patterns. > > > eric > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss Jim Dunham Storage Platform Software Group Sun Microsystems, Inc. wk: 781.442.4042 http://blogs.sun.com/avs http://www.opensolaris.org/os/project/avs/ http://www.opensolaris.org/os/project/iscsitgt/ http://www.opensolaris.org/os/community/storage/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
