I am in the process of formatting some now on /var/diskpool/satacopyvolf
(the directory that hasn't had many allocations. It was added to the
initial set and I then did an upd devclass.
I was given an error when I tried using 5000 as a formatsize; it took a
1000.
So now I assume I can delete the volumes auto created in the other
directories and then use the def vol to repopulate the space.
I've noticed some volumes are 0 percent used but TSM reports out of
space ( on new volume creates). This was also when volf was showing 0
percent utilization.
Question. We have several LARGE files that span multiple physical
volumes. Will TSM allow a backup of a file that spans the size it the
virtual volume it creates on disk?
Device Class Name: CPSATABG
Device Access Strategy: Sequential
Storage Pool Count: 1
Device Type: FILE
Format: DRIVE
Est/Max Capacity (MB): 2,048.0
Mount Limit: 7
Mount Wait (min):
Mount Retention (min):
Label Prefix:
Library:
Directory:
/var/diskpool/satacopyvola,/var/diskpool/satac-
opyvolb,/var/diskpool/satacopyvoc,/var/diskpo-
ol/satacopyvold,/var/diskpool/satacopyvole,/v-
ar/diskpool/satacopyvolf
>>> lipp AT STORSERVER DOT COM 12/04/06 1:37 PM >>>
And then after you have all the underlying AIX work done, you should
create the copy storage pool device class using some reasonable size
maxcap value. I've had reasonable success with 5000M as a starter.
Then instead of using scratch volumes (set maxscratch on the pool to
zero), use define vol stgpool /ld1/of formatsize=5000 numberofvol=256
to
create the volumes. This will create 256 files named /ld1/of0000,
of0001, etc. Repeat until you fill up the logical drive. By creating
the volumes like this you avoid fragmentation on your drives. If you
need more detail about the commands to set this up, let me know.
The key to successful use of file device class on devices of this sort
is large write back caches. I assume you will RAID5 the drives in the
DS4800. Since RAID5 is not particularly good for write, the cache is
very important. We have had good luck with large disk pools using the
file device class. Our shelves, though, have 1GB of cache.
Kelly J. Lipp
VP Manufacturing & CTO
STORServer, Inc.
485-B Elkton Drive
Colorado Springs, CO 80907
719-266-8777
lipp AT storserver DOT com
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of
Andrew Carlson
Sent: Monday, December 04, 2006 10:24 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] copypools on disk on AIX?
We tried file device class with our onsite pool with disappointing
results.
I believe the problem was our decision not to stripe across LUN's.
This
would have made performance much better, at the cost of a LUN failure
causing more damage than if we used them indicidually. Now, I can't
remember the last time I saw a LUN failure, but YMMV. We will
probably
address this issue again when the decision is made to move our copy
pool
to disk.
On 12/1/06, Lawrence Clark <Larry_Clark AT thruway.state.ny DOT us> wrote:
>
> We are migrateing our copypool from cartridge to a DS4800.
>
> From the manuals copypools only support FILE type devices.
>
> My assumptions ( on AIX) are:
>
> -I create logical volumes and file systems -Define the device class
> -TSM then creates the files in the filesystem
>
> Anyone ever done this with copypools on AIX?
>
> >>> rehorst AT POHA DOT COM 12/01/06 9:56 AM >>>
> Know of anyone using a vaulting service with transmissions over the
> Internet with TSM? We're at capacity and looking for options.
>
> Regards,
> Orin
>
> Orin Rehorst
>
>
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