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Re: [Networker] Staging to Advanced File Type devices
2005-08-17 10:46:10
Mark Davis wrote:
We have 10 TB of "Advanced File Type" disk used to stage our data. The
disk is broken up into 14 700 GB file systems. The problem we are having
is that NetWorker does not distribute the data evenly across these file
systems. When selecting a device for backup, NetWorker always seems to
pick the disk that has the most data. If one disk is at 8% full, and
another is at 75% full, it will use the one with 75%.
Of course this makes sense when backing up to tape, but causes a variety
of problems when using disk. For example, it makes it very difficult to
maintain a uniform retention period for the data on disk.
Has anyone else run into this problem, and is there a way to even out the
data distribution.
I don't think this is the way that adv_file devices are designed to be
used. The other problem you might see is that when a device becomes full
the backups in progress won't span to another volume in the same way
that a tape device will. My understanding is that you would generally
have at most one (possibly very large) adv_file device in use per pool
per storage node. I believe that if you merge all your 14 filesystems
into one volume you will find that things work as you expect.
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