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тАО11-11-2003 03:12 AM
тАО11-11-2003 03:12 AM
rp8400 configuration
thanks
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тАО11-11-2003 03:42 AM
тАО11-11-2003 03:42 AM
Re: rp8400 configuration
is very advisable that the two nodes own the same resources.
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тАО11-11-2003 04:27 AM
тАО11-11-2003 04:27 AM
Re: rp8400 configuration
It's reccomended that you use the same amount of memory across all the cell boards. read the doc:
http://docs.hp.com/hpux/onlinedocs/5187-4534/5187-4534.html
-Josh
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тАО11-11-2003 06:24 AM
тАО11-11-2003 06:24 AM
Re: rp8400 configuration
But what I'm infering from your posting is 2 servers without any partitions that are clustered together via some unprovided application. And this is the only thing that bothers me; The clustering. Epecially in a MC/ServiceGuard cluster.
So please clarify these two issues:
a) Partitioning and what configuration?
b) What application used to cluster?
The long and short of it is, if no partitioning in two separate servers then build them as you like because there are no limits to resource configuration.
But depending upon the type of clustering, especially in a High Availability failover environment cluster, then clustering usually means having identical servers.
The only exception might be to a third disaster recovery node that has been cut down for lack of use.
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тАО11-11-2003 06:32 AM
тАО11-11-2003 06:32 AM
Re: rp8400 configuration
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тАО11-11-2003 07:00 AM
тАО11-11-2003 07:00 AM
Re: rp8400 configuration
I think that it is possible to add a cell board with no memory, but you will be adding a huge load on the bandwidth of the crossbar backplane because those CPUs will have to go through the backplane every time they access memory.
also, just because you are not following some of the configuration guidelines right now without a noticeable performance hit, doesn't mean it's a good idea to to stop following others. there should be memory evenly distributed across the cell boards
-Josh
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тАО11-13-2003 12:45 AM
тАО11-13-2003 12:45 AM
Re: rp8400 configuration
I just copied it from documentation for U
____________________________________________
Performance and High Availability:-
For high availability reasons, a cell should contain at least 8 memory DIMMs (Dual Inline Memory Modules) for a minimum of 4 GB RAM. For the best performance, all the cells in a partition should contain the same amount of RAM. This is because all the memory in a partition is fully cache-line-interleaved, meaning that each cell's memory forms part of a common pool used by processes running on that partition. If one cell in the partition has more memory than the others, that cell will contribute disproportionately to the pool and the connections to and from it will be overworked, degrading performance.
_________________________________________
Saurav
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тАО11-13-2003 01:00 AM
тАО11-13-2003 01:00 AM
Re: rp8400 configuration
Saurav
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тАО11-13-2003 01:25 AM
тАО11-13-2003 01:25 AM
Re: rp8400 configuration
Although it's highly, highly recommended that cluster members that will be failover pairs be identical - it's not mandatory.
I've had oddball clusters in the past. One I remember was a V-class, L-class & a K-class.
We had to setup the failover policy so that there was no way to swamp the K or the L if the V failed. It worked, but it wasn't pretty.
As to the RAM - yes - you'll suffer a performance hit if the cells aren't matched.
Again it will run that way - just not optimally.
My 2 cents,
Jeff