[zfs-discuss] zfs pool replication over removable hard ?
Hello I need full copy of server zfs pool on removable hard with zfs file system .(auto sync) and how to use removable hard on my laptop ? i am looking solution with zfs features . -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] zfs pool replication over removable hard ?
i found some solution for part 2: zpool export Backup remove usb storage and on laptop : zpool import Backup . but i need removable device take all data from other pool like replication . like one pool with two replicated hard or mirrored pool or raidz pool . please help ? -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] ZFS Fragmentation issue - examining the ZIL
Hello, One of my coworkers was sent the following explanation from Oracle as to why one of backup systems was conducting a scrub so slow. I figured I would share it with the group. http://wildness.espix.org/index.php?post/2011/06/09/ZFS-Fragmentation-issue-examining-the-ZIL PS: Thought it was kind of odd that Oracle would direct us to a blog, but the post is very thorough. Thanks, Josh Simon ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] booting from ashift=12 pool..
On Mon, Aug 01, 2011 at 11:22:36AM +1000, Daniel Carosone wrote: If you want to try it, the patch can be found at http://cr.illumos.org/view/6qc99xkh/illumos-1303-webrev/illumos-1303-webrev.patch Any chance of providing an alternate stage1/stage2 binary I can feed to installgrub? When you're ready.. There is already an updated patch that also works with mirrored pools: http://cr.illumos.org/view/77bat2me/illumos-1303-webrev-2/illumos-1303-webrev-2.patch We track this issue at https://www.illumos.org/issues/1303, so if I have to update the patch again, you can find it there. Hans -- %SYSTEM-F-ANARCHISM, The operating system has been overthrown ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] ZFS Fragmentation issue - examining the ZIL
In general the blogs conclusion is correct . When file systems get full there is fragmentation (happens to all file systems) and for ZFS the pool uses gang blocks of smaller blocks when there are insufficient large blocks. However, the ZIL never allocates or uses gang blocks. It directly allocates blocks (outside of the zio pipeline) using zio_alloc_zil() - metaslab_alloc(). Gang blocks are only used by the main pool when the pool transaction group (txg) commit occurs. Solutions to the problem include: - add a separate intent log - add more top level devices (hopefully replicated) - delete unused files/snapshots etc with in the poll... Neil. On 08/01/11 08:29, Josh Simon wrote: Hello, One of my coworkers was sent the following explanation from Oracle as to why one of backup systems was conducting a scrub so slow. I figured I would share it with the group. http://wildness.espix.org/index.php?post/2011/06/09/ZFS-Fragmentation-issue-examining-the-ZIL PS: Thought it was kind of odd that Oracle would direct us to a blog, but the post is very thorough. Thanks, Josh Simon ___ 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
Re: [zfs-discuss] ZFS Fragmentation issue - examining the ZIL
On Mon, Aug 1, 2011 at 2:16 PM, Neil Perrin neil.per...@oracle.com wrote: In general the blogs conclusion is correct . When file systems get full there is fragmentation (happens to all file systems) and for ZFS the pool uses gang blocks of smaller blocks when there are insufficient large blocks. The blog doesn't mention how full the pool was. It's pretty well documented that performance takes a nosedive at a certain point. A slow scrub is actually not related to the problems in the blog post, since there's not a lot of writes during (or at least caused by) a scrub. Fragmentation is a real issue with pools that are (or have been) very full. The data gets written out in fragments and has to be read back in the same order. If the mythical bp_rewrite code ever shows up, it will be possible to defrag a pool. But not yet. -B -- Brandon High : bh...@freaks.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] ZFS Fragmentation issue - examining the ZIL
On Aug 1, 2011, at 2:16 PM, Neil Perrin wrote: In general the blogs conclusion is correct . When file systems get full there is fragmentation (happens to all file systems) and for ZFS the pool uses gang blocks of smaller blocks when there are insufficient large blocks. However, the ZIL never allocates or uses gang blocks. It directly allocates blocks (outside of the zio pipeline) using zio_alloc_zil() - metaslab_alloc(). Gang blocks are only used by the main pool when the pool transaction group (txg) commit occurs. Solutions to the problem include: - add a separate intent log Yes, I thought that it was odd that someone who is familiar with Oracle databases, and their redo logs, didn't use separate intent logs. - add more top level devices (hopefully replicated) - delete unused files/snapshots etc with in the poll… If gang activity is the root cause of the performance, then they must be at the edge of effective space utilization. -- richard Neil. On 08/01/11 08:29, Josh Simon wrote: Hello, One of my coworkers was sent the following explanation from Oracle as to why one of backup systems was conducting a scrub so slow. I figured I would share it with the group. http://wildness.espix.org/index.php?post/2011/06/09/ZFS-Fragmentation-issue-examining-the-ZIL PS: Thought it was kind of odd that Oracle would direct us to a blog, but the post is very thorough. Thanks, Josh Simon ___ 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 ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
