From: Green, Simon (SGreen@KRAFTEUROPE.COM)
Date: Wed Aug 07 2002 - 10:09:19 EDT
Broadly speaking, the bigger the block size the greater the performance.
However, tape performance is dependent on a great many things.
How is the tape drive attached? SCSI or Fibre Channel? Are there other
devices on the same adapter?
What are you backing up? If you are backing up data from slow disks then
you won't get good performance from the LTO. If the data doesn't compress
well then your maximum theoretical performance will be 15MB/s.
Is your system busy with other work? You need to have some CPU power
available to drive it.
What sort of server is it? What is the I/O bus speed and how much other I/O
is going on?
You need to consider all of these things and none of it is specific to LTO.
Simon Green
Philip Morris ITSC Europe
AIX-L Archive at http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
AIX FAQ at http://www.faqs.org/faqs/aix-faq/
N.B. Unsolicited email from vendors will seldom be appreciated.
> -----Original Message-----
> From: L [mailto:leed@CHELE.CAIS.NET]
> Sent: 07 August 2002 14:10
> To: aix-l@Princeton.EDU
> Subject: How to improve LTO tape driver performance?
>
>
> we just purchased a LTO 3580 tape driver connect to IBM Pseries
> computer. Based on document, LTO performance can be 15MB ~ 30
> MB/sec. While on our environment, I have been set "block
> size" to 0, 32k
> or 128K. The best performance I can get is 12MB/sec.
>
> Does anyone know how to improve LTO performance?
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