I can't talk to xfs tuning but ...
Making a generic comparison between windows and xfsdump is unfair, unless you
have exactly the same hardware involved.
In general you need to have a feed speed about 3x the tapes max. write speed to
keep the tape streaming.
IIRC a small dat drive can do about 3.6 GB/hr of compressed data.
If your data is 2:1 compressible, that is 7.2 GB/hr uncompressed. That sounds
like what you are getting on the windows box.
To get this, you probably have a disk-drive speed of about 21.6 GB/hr or more
on the windows box.
What sort of disk-drive speed do you have on the xfs box? I'm sure you know
that RAID can drastically improve your disk-speed.
BTW: With really high-end drives like SDLT (39 GB/hr compressed), you basically
have to design your whole storage system around their required feed rate if you
want them to be able to stream.
Deployment and Integration Specialist
Compaq ASE - Tru64
Compaq Master ASE - SAN Architect
The Norcross Group
>> I dumped about 9gb of data to a DDS3 DAT. It took about 4 hours with
>> On a windows box, with the same TBU, I can dump the same amount in about
>> 1.5 hrs. Can anyone suggest what I can do to speed things up a bit?
>> HP DDS3 SCSI DAT model: C1537A
>> Austin Gonyou
>> Systems Architect, CCNA
>> Coremetrics, Inc.
>> Phone: 512-698-7250
>> email: austin@xxxxxxxxxxxxxxx
>> "One ought never to turn one's back on a threatened danger and
>> try to run away from it. If you do that, you will double the danger.
>> But if you meet it promptly and without flinching, you will
>> reduce the danger by half."
>> Sir Winston Churchill
>> -- NextPart --
>> Attached File: c:\program