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Operating Systems Solaris zfs - get the name of the last snapshot Post 302550072 by RychnD on Wednesday 24th of August 2011 02:11:42 PM
Old 08-24-2011
Thanks for your reply.

When the script starts, it has no idea of what snapshots have been made so far. It first needs to find that out and choose the newest. After that's been determined, it can make a new snapshot and send the difference to the backup disk.

So the problem is I cannot call
Code:
zfs get creation pool/snapshot

directly - I first need to find out what snapshots to call it on.

I have the idea of calling
Code:
zfs list -t snapshot

and manually parsing the output for a list of snapshots made so far. Is this the easiest way to do that?
 

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backintime(1)							   USER COMMANDS						     backintime(1)

NAME
backintime - a simple backup tool for Linux. This is command line tool. The graphical tools are: backintime-gnome and backintime-kde4. SYNOPSIS
backintime [ --backup | --backup-job | --snapshots-path | --snapshots-list | --snapshots-list-path | --last-snapshot | --last-snapshot-path | --help | --version | --license ] DESCRIPTION
Back In Time is a simple backup tool for Linux. The backup is done by taking snapshots of a specified set of folders. All you have to do is configure: where to save snapshots, what folders to backup. You can also specify a backup schedule: disabled, every 5 minutes, every 10 minutes, every hour, every day, every week, every month. To configure it use one of the graphical interfaces available (backintime-gnome or backintime-kde4). It acts as a 'user mode' backup tool. This means that you can backup/restore only folders you have write access to (actually you can backup read-only folders, but you can't restore them). If you want to run it as root you need to use 'su'. A new snapshot is created only if something changed since the last snapshot (if any). A snapshot contains all the files from the selected folders (except for exclude patterns). In order to reduce disk space it use hard-links (if possible) between snapshots for unchanged files. This way a file of 10Mb, unchanged for 10 snapshots, will use only 10Mb on the disk. When you restore a file 'A', if it already exists on the file system it will be renamed to 'A.backup.currentdate'. For automatic backup it use 'cron' so there is no need for a daemon, but 'cron' must be running. user-callback During backup process the application can call a user callback at different steps. This callback is "$XDG_CONFIG_HOME/backintime/user- callback" (by default $XDG_CONFIG_HOME is ~/.config). The first argument is the progile id (1=Main Profile, ...). The second argument is the progile name. The third argument is the reason: 1 Backup process begins. 2 Backup process ends. 3 A new snapshot was taken. The extra arguments are snapshot ID and snapshot path. 4 There was an error. The second argument is the error code. Error codes: 1 The application is not configured. 2 A "take snapshot" process is already running. 3 Can't find snapshots folder (is it on a removable drive ?). 4 A snapshot for "now" already exist. OPTIONS
-b, --backup take a snapshot now (if needed) --backup-job take a snapshot (if needed) depending on schedule rules (used for cron jobs) --snapshots-path display path where is saves the snapshots (if configured) --snapshots-list display the list of snapshot IDs (if any) --snapshots-list-path display the paths to snapshots (if any) --last-snapshot display last snapshot ID (if any) --last-snapshot-path display the path to the last snapshot (if any) -h, --help display a short help -v, --version show version --license show license SEE ALSO
backintime-gnome, backintime-kde4. Back In Time also has a website: http://backintime.le-web.org AUTHOR
This manual page was written by BIT Team (<bit-team@lists.launchpad.net>). version 1.0.10 Mars 2009 backintime(1)
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