From: Manuel A. (Rudd-O) <ru...@ru...> - 2009-10-15 15:14:38
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> Why not stop mirroring the live data and instead use the storage in > the garage as backup? Is it essential that the system keeps working on > a disk failure? See AVS. However, mirroring and backups are solutions for separate problems. Without a mirror, you will have to restore from backup -- and if the disk failure is catastrophic, you will lose a shitload of data that you will then have to restore from backup in a hours-long procedure. > What I would do is set up a 5 disks raid5 locally with lvm (or zfs if > you like) and 9 disk raid5 in the garage. Then once a day snapshot the > local LVM, rsync it to the garage and delete the snapshot again. Rsync > supports creating a daily dir with hardlinks to the previous days file > where unchanged (or hourly or weekly). You can then easily keep the > tree for the last 3 days, last sunday and last sunday of a month or > whatever pattern you like. Ah, raidz. Reasonable, but you lose performance. I do the rsync thing from a mirrored zpool to a non-mirrored copies=2 external zpool. I would use AVS, but I use Linux. If it was a remote machine, I'd zfs send | zfs recv instead -- much faster and identical data copies. > Doing realy online mirroring will quickly reduce your speed to the > gbit link and filesystem errors will affect both mirrors. > > MfG > Goswin > > --------------------------------------------------------------------------- > --- Come build with us! The BlackBerry(R) Developer Conference in SF, CA is > the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9 - 12, 2009. Register now! > http://p.sf.net/sfu/devconference > _______________________________________________ > fuse-devel mailing list > fus...@li... > https://lists.sourceforge.net/lists/listinfo/fuse-devel > |