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confusion with number of processors using ESE

P: n/a
Hello,

I am a bit confused as to how this all works with respect to number of
processors on a Linux machine. The situation I am encountering is this :
because of Hyperthreading technology, the OS thinks it has four
processors, but in reality, it has only two. I have updated the db2licm
to use two processors, but want to be certain I did the right thing.
Would it be possible to "pretend" that the machine does indeed have four
processors somehow? Would that then allow four Nodes and attendant
Nodegroups?

I know I'm prolly fishing for trouble, but I thought I'd see what
response I'd get !!

Thanks in advance

Mairhtin O'Feannag
Nov 12 '05 #1
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2 Replies


P: n/a
I don't believe the db2licm command has anything to do with how many
processors db2 uses. It is merely there for licensing purposes. The
ability for processor affinity and how it is done depends on the os
platform. It (I believe) is normally done via the os.

Larry Edelstein

mairhtin o'feannag wrote:
Hello,

I am a bit confused as to how this all works with respect to number of
processors on a Linux machine. The situation I am encountering is this :
because of Hyperthreading technology, the OS thinks it has four
processors, but in reality, it has only two. I have updated the db2licm
to use two processors, but want to be certain I did the right thing.
Would it be possible to "pretend" that the machine does indeed have four
processors somehow? Would that then allow four Nodes and attendant
Nodegroups?

I know I'm prolly fishing for trouble, but I thought I'd see what
response I'd get !!

Thanks in advance

Mairhtin O'Feannag


Nov 12 '05 #2

P: n/a

"Larry" <La***@nospam.net> wrote in message
news:ri********************@news4.srv.hcvlny.cv.ne t...
I don't believe the db2licm command has anything to do with how many
processors db2 uses. It is merely there for licensing purposes. ======
Exactly.
And even for the licensing purposes, you only need to care the physical
processor numbers.
In fact, db2 process model is designed for multi-process/single thread on
Linux. You are not benefit from Hyperthreading technology.
The
ability for processor affinity and how it is done depends on the os
platform. It (I believe) is normally done via the os.

Larry Edelstein

mairhtin o'feannag wrote:
Hello,

I am a bit confused as to how this all works with respect to number of
processors on a Linux machine. The situation I am encountering is this : because of Hyperthreading technology, the OS thinks it has four
processors, but in reality, it has only two. I have updated the db2licm
to use two processors, but want to be certain I did the right thing.
Would it be possible to "pretend" that the machine does indeed have four
processors somehow? Would that then allow four Nodes and attendant
Nodegroups?

I know I'm prolly fishing for trouble, but I thought I'd see what
response I'd get !!

Thanks in advance

Mairhtin O'Feannag

Nov 12 '05 #3

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