I had to look back at Marcy's message, yes she means DB2/UDB on Linux,
not DB2 on VM (which I'm guessing relates to your answer).
Neale Ferguson wrote:
Given that DB2 will be *BLOCKIO to do its I/O (I think that it does anyway)
will z/VM create the necessary SCSI commands directly or does it construct
an FBA CCW chain that then needs to be translated? If it's the former then
performance should be quite good, if the latter then there's a bit of
overhead that will be endured.
-----Original Message-----
Everything I've heard says SCSI kicks butt. See some of the SHARE
presentations related to SCSI, they have charts and graphs.
Marcy Cortes wrote:
Some folks here want to run DB2 databases on z/Linux. I think we need
something bigger than 3390 mod 9 for databases (I think using LVM across
more than say 8 disks is a pita and have told them 50G is as big as they
can have :). The z/OS guys want to give us mod 54's like they have.
I've been pushing for LUNs. What say ye performance experts about 54's?
Can we even us those for z/Linux (sles9x - z/VM 5.2).
Marcy Cortes
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Rich Smrcina
VM Assist, Inc.
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