...and I ran into a situation where iscsi connected devices didn't
work properly when using 32-bit networker on 64-bit linux. Never
quite figured out why (although we had some theories about 32 versus
64 bit calls and iscsi code), since 64-bit NetWorker fixed it.
--Dave
Date: Thu, 28 May 2009 21:55:43 +1000
From: Preston de Guise <enterprise.backup AT GMAIL DOT COM>
Subject: Re: Running the Linux 64-bit package with the 2.6.x kernel
may result in crashes
On 27/05/2009, at 22:52 , Clark, Patti wrote:
> We had been using 64-bit networker on Red Hat ES 4 server for a =20
> couple of years. There were a number of crash issues, a patched =20
> nsrexecd, etc. When 7.3.3 came out we switched to 32-bit and have =20
> had fewer problems. There were no visible advantages to staying on =20=
> the 64-bit version.
My primary lab server has been 64-bit Linux for some time, with 64-bit =20=
7.4.[234] and more lately, 7.5.1. Being a lab machine, it gets quite a =20=
work out, but never a huge amount of daily data transfer.
For the most part I don't see many environments actually hugely =20
needing 64-bit NetWorker installs unless their primary platform of =20
choice is only available in 64-bit (e.g., Solaris/Sparc).
Typically when I've heard of 64-bit NetWorker issues on Linux they've =20=
been device related =96 I suspect if you've got, say, a backup server =20=
that only has disk backup units, with tape only on storage nodes, =20
you'd find 64-bit NetWorker not much of an issue for the server.
I've also noticed, but never been able to pin down, that Linux is =20
particularly ...distasteful... at error recovery on tape devices where =20=
you have the robot and a tape drive on the same SCSI chain, regardless =20=
of 32- or 64-bitness. Keeping robot heads on dedicated SCSI chains or =20=
using fibre-channel (even via fibre-channel bridges) increases the =20
reliability of NetWorker on Linux in relation to devices by (IMHO) =20
about 1000%.
Cheers,
Preston.
--
Preston de Guise
===================================
David Gold
Sr. Technical Consultant
Cambridge Computer Services, Inc.
Artists in Data Storage
Tel: 781-250-3000
Tel (Direct): 781-250-3260
Fax: 781-250-3360
dave AT cambridgecomputer DOT com
www.cambridgecomputer.com
===================================
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