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awarded  Popular Question
Mar
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comment Very low throughput on 10GbE network
I've had the exact same problem for over a year. I think the problem is with 10GbE. I'm thinking that even 8Gbps Fibre Channel is much better at throughput than 10GbE.
Mar
5
comment 10Gbps iSCSI network transferring at only 2Gbps
Really I tried everything on the accepted answer. JUMBO frames was what I thought was going to make the biggest difference, but really I've never been able to get past the 2Gbps limit. Only on IOMeter with 22 workers running for a multi-threaded write am I able to get above 8Gbps. But I know nothing that can do multi-threaded filesystem writes.
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accepted 10Gbps iSCSI network transferring at only 2Gbps
Jul
24
comment 10Gbps iSCSI network transferring at only 2Gbps
I have everything connected on a separate 10GbE network. I have 2 Controllers and they are each connected to a dedicated HP ProCurve on 10GbE. How was your Compellent configured? What do you think was the main bottleneck in performance after the Controller replacement?
Jul
24
comment 10Gbps iSCSI network transferring at only 2Gbps
I don't have my switches configured for Jumbo Frames. They're pretty much just configured with the IP's for SAN segment they are on. Flow Control is still default as well. I'm not sure my Compellent is configured for Jumbo frames either.
Jul
24
revised 10Gbps iSCSI network transferring at only 2Gbps
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Jul
24
comment 10Gbps iSCSI network transferring at only 2Gbps
I have a Tier 1 Filled with 5TB of 10K SAS spinning drives in RAID 10. My Tier 2 is all 7200rpm drives in 12 groups of 13 drives in each All in RAID6. I haven't measured packet loss. My MTU Sizes are the standard 1500bytes. CPU Utilization is really low. CPU on my StorNext servers are really low, like around 15%. My Compellent Doesn't give me CPU metrics, but I'm hitting a max of 2,000 IOPs with IOMeter. The Max speed we were able to hit briefly with IOMeter was 600MBps, but that wasn't fully sustainable. Not sure what my TCP Offload settings are either.
Jul
23
asked 10Gbps iSCSI network transferring at only 2Gbps
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