Tom,
I am importing in the other direction and seeing some wierdness also. I am
importing DLT to LTO.
Since "import" appears to be a streaming application, you would expect to
see full drive speed. Instead, my 8 MB/s DLT drives feed data to TSM at
2.5 to 3.5 MB/s. Even if the incoming file is very large so there is
almost no DB overhead. And my DLT library is on a dedicated PCI bus.
I have no idea why imports are running as slow as they do.
Tab Trepagnier
TSM Administrator
Laitram Corporation
Tom Tann{s <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 12/13/2001 05:43:12
PM
Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
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cc:
Subject: LTO, import data
Hello tsm'ers.
Has anyone using these drives tried to do a import node?
I have HP Ultrium drives, LVD-connected to a S7A, AIX.
TSM is 4.2.1.7.
When running an import from these drives I only get aroung 200KB/s, until
after some time the drive/scsi-bus/controller will give up.
Repeated tests on the same data/tape/drive result in the same, but the
amount of data imported could vary from some KB to several GB before the
crash.
All other operations to/from the drives work fine. Streaming, they are
really fast. Not streaming, not that good..., but that's not the issue
here, I hope.
I had a PMR opened on this two months ago, but nothing happens..
Has anyone using the IBM LTO-drives/Atapedriver had some experience in
importing data?
Any hints from LTO-users, IBM,HP or whatever, would be appreceated.
Tom
