Off topic a bit, but does anyone know how to map the st device names to
rmt device names in the iostat output? I've written a script to do it
but it seems a bit like hard work ... on my Solaris 9 boxes "iostat -xn"
lists the rmt device names.
thanks, Phil
> -----Original Message-----
> From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf
> Of Peter DrakeUnderkoffler
> Sent: 14 June 2007 00:48
> To: Ed Wilts
> Cc: VERITAS-BU AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] Tuning Solaris 10 for NetBackup Media Server
>
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> If your running the tapes on Solaris, the iostat utility will show the
> throughput on st devices as well as disks and ttys. If thats
> what your
> looking for, start with "iostat -xE" to list all the device
> names as needed
> by the iostat utility. Might show something like this:
>
> st15 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
> Vendor: HP Product: Ultrium 2-SCSI Revision: S33H Serial No:
>
> You can then run that against iostat as in "iostat st15 2"
>
> Thanks
> Peter
>
> Peter DrakeUnderkoffler
> Xinupro, LLC
> 617-834-2352
>
>
>
> Ed Wilts wrote:
> >>Our numbers vary greatly according to the clients. We have very old
> >>Solaris machines that backup at 50+ MB/sec. We have very
> new Windows
> >>machines where throughput varies greatly between different
> volumes on
> >>the same machine (e.g. a volume with 5 million tiny files
> backs up at
> >>30 MB/sec via FlashBackup, while another volume on the same machine
> >>gets about 7 MB/sec backing up small files via FlashBackup).
> >>
> >>It's difficult to get good numbers because we use
> multi-streaming and
> >>multiplexing like crazy. So the actual throughput to the
> drive is the
> >>sum of the jobs using the drive at that moment. Individual
> jobs vary
> >>between 5 MB/sec and about 65 MB/sec. But the total
> throughput to the
> >>tape heads is unknown.
> >>
> >>Anyone know an easy way to calculate that?
> >
> >
> > If your drives are fibre-attached, use something like MRTG
> to grab the fibre
> > port stats and graph that. That gives us a pretty good
> idea as to what the
> > tape speeds are.
> >
> > --
> > Ed Wilts, Mounds View, MN, USA
> > mailto:ewilts AT ewilts DOT org
> > I GoodSearch for Bundles Of Love:
> > http://www.goodsearch.com/?charityid=821118
> >
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