New hammer utility feature in HEAD: 'hammer cleanup'
johannes.hofmann at gmx.de
Sat Sep 27 13:04:40 PDT 2008
Matthew Dillon <dillon at apollo.backplane.com> wrote:
> I've added a meta-command to the hammer utility.
> 'hammer cleanup' will do the following:
> * Locate all mounted HAMMER filesystems, including PFS's mounted with
> * Create <fs>/snapshots and <fs>/snapshots/config if they do not exist.
> * Snapshot, prune, and reblock the filesystems based on the config file.
> This command will properly run hammer utility commands with cycle
> files ( <fs>/snapshots/.*.cycle ) and time limits (default 5 minutes)
> per sub-command.
> The config file by default specifies that snapshots, pruning, and
> reblocking should occur daily. That is, if you run this command
> multiple times it will be a NOP most of the time, until the day turns
> over, then it does its stuff.
> The general idea is to use this command to take all the effort out of
> building your own scripts to do these operations, simply running the
> command without any arguments from cron.
When run on a filesystem without snapshots, cleanup seems to create a
single snapshot and start pruning.
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