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08-23-2010 06:08 PM
08-23-2010 06:08 PM
Performance Monitor and Remote Copies / Re-Striping
I just kicked off several large remote copies from one cluster to another cluster in the same management group.
I was monitoring performance and noticed very little throughput when monitoring the "Throughput Total" for the two node cluster.
I'm running ALB.
When i add each explicit storage node and view their "Throughput Total" the values are more in line with what i would expect.
See attached snapshot or if you just want the numbers
Cluster "Throughput Total" 7,131 B/s
NSM4 "Throughput Total" 28,320,255 B/s
NSM5 "Throughput Total" 28,412,224 B/s
Why doesn't the sum of the storage nodes equal the cluster?
I was monitoring performance and noticed very little throughput when monitoring the "Throughput Total" for the two node cluster.
I'm running ALB.
When i add each explicit storage node and view their "Throughput Total" the values are more in line with what i would expect.
See attached snapshot or if you just want the numbers
Cluster "Throughput Total" 7,131 B/s
NSM4 "Throughput Total" 28,320,255 B/s
NSM5 "Throughput Total" 28,412,224 B/s
Why doesn't the sum of the storage nodes equal the cluster?
1 REPLY 1
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08-24-2010 11:06 AM
08-24-2010 11:06 AM
Re: Performance Monitor and Remote Copies / Re-Striping
I also discussed this with HP today.
They didn't give me a good answer. They were trying to say that this was the extra overhead that has to happen with Network Raid.
I think it's more of how they calculate/track - and that they exclude remote copies/striping in the cluster throughput total. It only seems to show ISCSI target related traffic.
As a test i simply launched a VM that was stored in a volume on this cluster and executed several large file copies. As soon as i did this the cluster throughput jumped as expected to come close to the individual nodes.
They didn't give me a good answer. They were trying to say that this was the extra overhead that has to happen with Network Raid.
I think it's more of how they calculate/track - and that they exclude remote copies/striping in the cluster throughput total. It only seems to show ISCSI target related traffic.
As a test i simply launched a VM that was stored in a volume on this cluster and executed several large file copies. As soon as i did this the cluster throughput jumped as expected to come close to the individual nodes.
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
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