Hi Jim,
I have some experiments of generic iSCSI testing and TSM 5.5/6.1. We are at the
moment looking at to upgrade from 6.1 to 6.2 but that's a different story.
The knowledge I have of iSCSI is really good, but I haven't push the bandwidth
to the max if I tell you the truth.
The only part I have so far removed always from the iSCSI part is the
Database/Active Log and Archive Log. If something happened with the Ethernet
cable or the network people is playing to much with the network rolls, then can
you end up with a bad database and you need to do a database recovery.
End of the line. So far do I have good feeling of iSCSI as long I have multiple
Ethernet cables and switches to go though.
Also, one thing you need to remember, that most Ethernet people forgot when
they try to configure the server is the PCI BUS speed vs Network data that you
try to transfer.
(The same rolls that you have for FC today)
I hope the small information I have could help.
Best Regards
Christian Svensson
Cell: +46-70-325 1577
E-mail: Christian.Svensson AT cristie DOT se
Skype: cristie.christian.svensson
Supported Platform for CPU2TSM::
http://www.cristie.se/cpu2tsm-supported-platforms
________________________________________
Från: James R Owen [Jim.Owen AT YALE DOT EDU]
Skickat: den 5 maj 2010 13:36
Till: ADSM-L AT VM.MARIST DOT EDU
Ämne: ? linux TSM 6.2 using 10GE iSCSI ... to backup HPC ?
?Are you: doing TSM backups to iSCSI disk/tape? w/10GE? w/TSM6.?
Scanning ADSM-L archives, actual TSM experience w/iSCSI seems scarce!
Recently, Gary Bowers recommends "DirectIO No" in dsmserv.opt w/ iSCSI,
and in 2007 Ben Bullock had iSCSI poor performance (w/o that setting?)
Most other iSCSI threads are questions answered by theory/opinion.
We hope to backup HPC (primarily Gene Sequencing Experiments) w/TSM 6.2.
HPC infrastructure:
RHEL linux clusters using Panasus PanFS iSCSI disk array
via 10Gb ethernet
To best integrate TSM into their infrastructure, the HPC group wants to
backup to iSCSI disk/tape storage via 10GE w/ TSM v6.2 running on RHEL.
Our current TSM experience is w/ AIX6.1, TSMv5.5.4.2, FC disk/tape,
so we're really trying to "shoot the moon" w/ this new HPC TSM config.
!But, hey! It's all going to be new, so why not ...totally different?
Please advise, if you have relevant experience/facts,
(or theories/opinions, as you believe appropriate;-)
FYI, here's how we hope this can work:
Because TSM does not support Panasus PanFS, we will use tar to copy
completed GeneSeqExprmnts onto (iSCSI) EXT3 FS space @ RHEL linux
hosting both TSM 6.2 server and client. TSM client will backup
GSE tarballs from EXT3 FS w/ dsmc incremental via ShrMem to TSM 6.2
server, directly onto (iSCSI) LTO5 tape w/compression. Other PanFS
volumes will backup via dsmc incremental from NFS mounts @ TSM client
via ShrMem to (iSCSI) sequential file STGpool space w/ dedup enabled.
(We also hope to use TSM client dedup effectively!-)
Thanks for any advice!
--
Jim.Owen AT Yale DOT Edu (w#203.432.6693, c#203.494.9201, h#203.387.3030)
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