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Re: [Networker] SV: [Networker] Backup to Adv-file device
2009-01-01 19:17:47
Ben Deng wrote:
Thanks for these answers,
We do not use staging because those savesets on disk volumes already are cloned
to tapes after backupgroups was finished. And a scheduled cloning job also
running and search savesets, not being cloned by backupgroups, and clone them
to tapes. Once a day there is a scheduled job to search for savesets that are
older than 28 days and delete them. So far it works ok. But it doesn't help to
solve the problem with a volumes not have anymore space during backup, while in
the same time there are plenty spaces in other volumes. Advfile device is
designed to be use with diskdevices and why should spaces be limited within a
single volumes? Just because it's design from beginning as such behaviour,
doesn't mean it couldn't be change for the better.
Ac couple of suggestions:
. When you are out of space on a AFTD use your existing script that
deletes old savesets, but tell it to delete savesets older than 27 days
(or 26). Just do that until you get enough space. By the way, you
practically implemented "delayed staging" which is a feature that I
always thought is desired for AFTD.
. Try to distribute the backup process to all devices. I suppose that
all AFTDs belong to the same pool. You can monitor the utilization of
them and put the most utilized device in read only mode so that new data
doesn't go to it. This will make sure that data is spread evenly on all
devices.
. If you are not intimidated by a 30Tb file system, you can simply
collapse all existing file systems into a single one and avoid this
utilization problems. If you are on Solaris 10, ZFS should be able to do
that quite easily, although I am not sure what will be the performance
impact of such a change.
>Iknow there's EMC representatives monitoring this forum, so I
therefore urge them to consider a redesign of adv-file device, maybe
making a adv-file volume group will solve this problem.
Yes, unfortunately, I wasn't under the impression that they are in a
position to conduct an open dialog with our user community. They are
most likely restricted by some EMC policy (most likely devised by legal
advisers), which doesn't allow them to do that. They usually lurk and I
also didn't see any ideas discussed in this list show up later in
Networker (as opposed to a dialog).
Regars,
Ben Deng
--
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