Also check your maximum filesize for the storage pool. If the clients
contain a file that exceeds the maximum file size then the data will go to
the next storage pool which is probably tape.
Jim Sporer
At 03:51 PM 4/4/2001 -0400, you wrote:
>Do a "q stg" when this happens and see what the "Pct Util" and Pct Migr"
>is for the disk storage pools in question. If Pct Util is anywhere near
>say 90% when a bunch of clients are sending data then some of them WILL
>start trying to go directly to tape.
>
>Why you say? Example: you have 10GB storage pool that is 90% full. 2
>clients each start to send a new 1 GB file. Immeadiately the Pct Util
>would be theoretically 110% as space is allocated for the size of the
>file, but it will take some time for the file to be completely transfered.
>
>So one of them will not be able to get it's space as we can't be over 100%
>and it will therefore attempt to go directly to tape. Ciomplictate this
>with many clients and many different size files (And probably a few fudge
>factors) and you will get these results.
>
>We have seen backups start to go to tape when our stg pool was about 90% +
>full with a handfull of clients sending 2GB files.
>
>If you are getting about 90% full anytime then you probably need to either:
>
>1. Spread out the backups so not as many machines are going to the server
>at once.
>
>2. Increase the disk space available to the disk storage pools that are
>being filled.
>
>
>David B. Longo
>System Administrator
>Health First, Inc.
>3300 Fiske Blvd.
>Rockledge, FL 32955-4305
>PH 321.434.5536
>Pager 321.634.8230
>Fax: 321.434.5525
>[EMAIL PROTECTED]
>
>
> >>> [EMAIL PROTECTED] 04/04/01 03:01PM >>>
>I run my backups at night around 10:30pm. I have around 50 servers doing
>incrementals concurrently at this time. I noticed that about half are
>experiencing MEDIAW when I do a "q session". They seem to be waitng to for
>a tape to load in my library for them to write to but the storage pool that
>these clients write to first is disk based then when it fills to 90% it
>should migrate to tape. My question is, if they are suppose to be going to
>disk storage pool first and it isn't full then why are they waiting for
>tape. Which is what I am assuming is happening.
>
>Thanks
>Richard
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>"MMS <health-first.org>" made the following
> annotations on 04/04/01 15:51:47
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