Re: [zfs-discuss] [osol-discuss] zfs send/receive?
hi all I'm using a custom snaopshot scheme which snapshots every hour, day, week and month, rotating 24h, 7d, 4w and so on. What would be the best way to zfs send/receive these things? I'm a little confused about how this works for delta udpates... Vennlige hilsener / Best regards The initial backup should look like this: zfs snapshot -r exp...@backup-2010-07-12 zfs send -R exp...@backup-2010-07-12 | zfs receive -F -u -d portable/export (portable is a portable pool; the export filesystem needs to exist; I use one zpool to receive different zpools, each in their own directory) A incremental backup: zfs snapshot -r exp...@backup-2010-07-13 zfs send -R -I exp...@backup-2010-07-12 exp...@backup-2010-07-13 | zfs receive -v -u -d -F portable/export You need to make sure you keep the last backup snapshot; when receiving the incremental backup, destroyed filesystems and snapshots are also destroyed in the backup. Typically, I remove some of the snapshot *after* the backup; they are only destroyed during the next backup. I did notice that send/receive gets confused when older snapshots are destroyed by time-slider during the backup. Casper ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] [osol-discuss] zfs send/receive?
From: Richard Elling [mailto:richard.ell...@gmail.com] It is relatively easy to find the latest, common snapshot on two file systems. Once you know the latest, common snapshot, you can send the incrementals up to the latest. I've always relied on the snapshot names matching. Is there a way to find the latest common snapshot if the names don't match? ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] [osol-discuss] zfs send/receive?
On Sep 26, 2010, at 4:41 AM, Edward Ned Harvey sh...@nedharvey.com wrote: From: Richard Elling [mailto:richard.ell...@gmail.com] It is relatively easy to find the latest, common snapshot on two file systems. Once you know the latest, common snapshot, you can send the incrementals up to the latest. I've always relied on the snapshot names matching. Is there a way to find the latest common snapshot if the names don't match? If the snapshot names don't match, then the snapshots are not of the same data, by definition. The actual comparison is easy: given two (time sorted) lists, find the latest, common entry. -- richard ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] [osol-discuss] zfs send/receive?
From: opensolaris-discuss-boun...@opensolaris.org [mailto:opensolaris- discuss-boun...@opensolaris.org] On Behalf Of Roy Sigurd Karlsbakk I'm using a custom snaopshot scheme which snapshots every hour, day, week and month, rotating 24h, 7d, 4w and so on. What would be the best way to zfs send/receive these things? I'm a little confused about how this works for delta udpates... Out of curiosity, why custom? It sounds like a default config. Anyway, as long as the present destination filesystem matches a snapshot from the source system, you can incrementally send any newer snapshot. Generally speaking, you don't want to send anything that's extremely volatile such as hourly... because if the snap of the source disappears, then you have nothing to send incrementally from anymore. Make sense? I personally send incrementals once a day, and only send the daily incrementals. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] [osol-discuss] zfs send/receive?
On Sep 25, 2010, at 7:42 PM, Edward Ned Harvey sh...@nedharvey.com wrote: From: opensolaris-discuss-boun...@opensolaris.org [mailto:opensolaris- discuss-boun...@opensolaris.org] On Behalf Of Roy Sigurd Karlsbakk I'm using a custom snaopshot scheme which snapshots every hour, day, week and month, rotating 24h, 7d, 4w and so on. What would be the best way to zfs send/receive these things? I'm a little confused about how this works for delta udpates... Out of curiosity, why custom? It sounds like a default config. Anyway, as long as the present destination filesystem matches a snapshot from the source system, you can incrementally send any newer snapshot. Generally speaking, you don't want to send anything that's extremely volatile such as hourly... because if the snap of the source disappears, then you have nothing to send incrementally from anymore. Make sense? It is relatively easy to find the latest, common snapshot on two file systems. Once you know the latest, common snapshot, you can send the incrementals up to the latest. I personally send incrementals once a day, and only send the daily incrementals. For NexentaStor customers, the auto-sync service manages this rather well. -- richard ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
