When did Sun offer zfsdump and zfsrestore to Solaris/openSolaris ? === found in ZFS best practice document
The zfs send and receive commands are not enterprise-backup solutions. The receive operation is an all-or-nothing event, you can get all of a snapshot or none of it. If you store the output of zfs send on a file or on tape, and that file becomes corrupted, then it will not be possible to receive correctly and none of the data will be recoverable. See RFE CR6736794. Enterprise backup solutions, as well as other copying methods, such as cp, tar, rsync, pax, cpio, and so on, are more appropriate for backup/restore than zfs send/receive. ==== Sun said ZFS is unlimited ! Very well, but I found no standard simple backup solution (aka zfsdump/zfsrestore). So I have tried cpio the best one among pax, tar, rsync, pax, cpio, and so on ... (because cpio handle multivolume/incremental backup with find, etc.) My basic backup cpio command is : cd /zfs find . -xdev -depth -print | \ cpio -aocP@ -C 64512 -M "Mount next cartridge" -O /dev/rmt/0h with -c option cpio is limited to 4 Gb and I get errors on file like the CentOS-5.3-x86_64-bin-DVD.iso or openSUSE-11.1-DVD-i586.iso (files bigger than 4 Gb are not exceptions today in parallel computing for example). If I replace "-c" cpio option with "-H ustar", files > 4 Gb are OK but max pathname length decrease from 1023 (with -c) to 255 (with -H odc). Path longer than 255 are not exceptions today (web server with CMS for example). So "zfs send" AND "cpio" are not reliable to backup ZFS fs. It's a problem every time I have isolated DMZ server with local DAT that can't access to my enterprise backup solution. Adding option "-H zfs" allowing 1023 pathname and big files to cpio could be a waiting solution. When did Sun offer zfsdump and zfsrestore to Solaris/openSolaris ? I have tried this solution : ... ... zfs snapshot -r $snapshot zfs send -R $snapshot | dd of=$device bs=126b conv=sync zfs destroy $snapshot but with this method I found two problems : 1 : I did not found how to list the tape archive content 2 : I did not found how to restore a single file How can I solve them ? -- This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list [email protected]
