zfs discuss - Jan 2009 - Time Slider bug??

I have the time slider enabled on two 2008.11 systems, and I noticed that for
both systems, the "weekly" snapshots did not run on 12/15/08.

This is no big deal.  It''s just an observation that I thought
I''d mention in case it leads to something that needs to be fixed.

Interesting that the weekly snapshots run on Monday.  Shows the difference in
thinking of when a week begins or ends.  In the future, it would be nice to have
more control over the slider''s settings, such as what days the weekly
runs, or setting it to use maybe only 30% instead of the current minimum of 70%
for snapshots.  I suppose this is all in a config file somewhere, but I
haven''t spend any time looking for it, and the man pages don''t
seem to exist yet.
-- 
This message posted from opensolaris.org

Hi there,

William Bauer wrote:
> Interesting that the weekly snapshots run on Monday.  Shows the
> difference in thinking of when a week begins or ends.  In the future,
> it would be nice to have more control over the slider''s settings,
The core auto-snapshot service will have this support in nv_107 with the 
putback of:

changeset:   36:2e0ed0076cbb
user:        Luca Morettoni <luca at morettoni.net>
date:        Wed Dec 03 11:55:19 2008 +0100
description:
	6777694 Need ability to control when auto-snapshots are taken

where setting the "zfs/offset" SMF property allows you to specify when
in the given time period the snapshot should be taken. I don''t know of 
any plan to expose this in the GUI though (not thinking that it would be 
a common requirement)
> such as what days the weekly runs, or setting it to use maybe only
> 30% instead of the current minimum of 70% for snapshots.
I think that 70% is the threshold at which the point the time slider 
cleanup script starts warning about zpool free space, before starting to 
destroy auto-snapshots in a relaxed or frantic manner (as opposed to 
defining a percentage of disk space that auto-snapshots use)
> this is all in a config file somewhere, but I haven''t spend any
time
> looking for it, and the man pages don''t seem to exist yet.
Sorry, no man pages yet - the GUI is as simple as possible at the 
moment, and doesn''t allow the user to tweak very much. Expert users can
change SMF property values in these services directly:

svc:/system/filesystem/zfs/auto-snapshot:frequent
svc:/system/filesystem/zfs/auto-snapshot:hourly
svc:/system/filesystem/zfs/auto-snapshot:monthly
svc:/application/time-slider:default
svc:/system/filesystem/zfs/auto-snapshot:daily
svc:/system/filesystem/zfs/auto-snapshot:weekly

There''s documentation on the SMF properties for the core service at
/var/svc/manifest/system/filesystem/auto-snapshot.xml
http://blogs.sun.com/timf/resource/README.zfs-auto-snapshot.txt

	cheers,
			tim