UNSOLVED
Dell PowerVault MD3000i performance
We have Dell PowerVault MD3000i in iSCSI configuration. When I ping the iSCSI port, got
64 bytes from 10.10.100.111: icmp_seq=2 ttl=64 time=0.193 ms
The time is almost 0.2 ms. while inter-server ping, got
64 bytes from 10.10.150.101: icmp_seq=3 ttl=64 time=0.035 ms
There's a 5-time difference in the timing. They're on the same CISCO Catalyst switch configured in multiple VLANs.
Our problem is that the iSCSI disk performance is bad, much slower than local hard drive. Any comments?
64 bytes from 10.10.100.111: icmp_seq=2 ttl=64 time=0.193 ms
The time is almost 0.2 ms. while inter-server ping, got
64 bytes from 10.10.150.101: icmp_seq=3 ttl=64 time=0.035 ms
There's a 5-time difference in the timing. They're on the same CISCO Catalyst switch configured in multiple VLANs.
Our problem is that the iSCSI disk performance is bad, much slower than local hard drive. Any comments?
"We have Dell PowerVault MD3000i in iSCSI configuration. When I ping the iSCSI port, got
Different Host(s) OS(s) handle MPIO differently. I'd look there. With that said, remember SANs are all about I/O's per second not sustained throughput. Generall an OS may boot slower but application performance can be dramatically increased over direct attached.
64 bytes from 10.10.100.111: icmp_seq=2 ttl=64 time=0.193 ms
The time is almost 0.2 ms. while inter-server ping, got
64 bytes from 10.10.150.101: icmp_seq=3 ttl=64 time=0.035 ms
There's a 5-time difference in the timing. They're on the same CISCO Catalyst switch configured in multiple VLANs.
Our problem is that the iSCSI disk performance is bad, much slower than local hard drive. Any comments?"
Jeff Sullivan
184 Posts
352
0
Posted March 31st, 2010 12:00
The switch in between could be tuned as well, per this document:
http://www.delltechcenter.com/page/Configuring+a+PowerConnect+5424+or+5448+Switch+for+use+with+an+iSCSI+storage+system#clearStyles
An article on MD3000i performance monitoring:
http://www.delltechcenter.com/page/MD3000i+Performance+Monitoring
And finally, an optimizing performance page:
http://www.delltechcenter.com/page/Optimizing+PowerVault+MD3000i+Performance