From: Emmanuel F. <ef...@in...> - 2013-09-11 19:13:13
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Le Tue, 10 Sep 2013 22:02:23 -0700 vous écriviez: > In all fairness, LIO + target_core_file disables buffered operation by > default in favor of data integrity during target power failure. > > Enabling buffered FILEIO should give you comparable results to the > other targets that use buffered FILEIO by default (like IET for > example) > > * Also, the default_cmdsn_depth=16 value is tuned for 1 Gb/sec > workloads, so you'd want to bump this to say 64 or 128 for an > apples to apples comparison over 10 Gb/sec ethernet. Actually the most consistent results were achieved with blockio. To sustain more than 10Gb/s throughput, I striped 2 targets across 2 10 GigE connections. > > IET leaves every other iscsi target in the dust by a very large > > margin; in fact it actually performs better than most tested dual > > attached FC 8Gb storage arrays (several products using Infortrend or > > arena controllers). > > > > SCST actually achieves similar performance but makes the system > > unstable, while under iet it's rock solid. > > > > I'd love to hear your results! About 1,6 GB/s sustained on the whole volume (even with almost full disks), reading 4K DPX files sequences (about 50 MB each). This a comfortable margin over the 1.2 GB/s required for smooth 24 FPS. What other details would you like to know? -- ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | <ef...@in...> | +33 1 78 94 84 02 ------------------------------------------------------------------------ |