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sc846e1
2010 Jun 21
0
Seriously degraded SAS multipathing performance
...g you guys can help me achieve full throughput
across both paths.
My System Config:
OpenSolaris snv_134
2 x E5520 2.4 GHz Xeon Quad-Core Processors
48 GB RAM
2 x LSI SAS 9200-8e (eight-port external 6Gb/s SATA and SAS PCIe 2.0 HBA)
1 X Mellanox 40 Gb/s dual port card PCIe 2.0
1 x JBOD: Supermicro SC846E2-R900B (Dual LSI SASX36 3Gb/s Expander
Backplane, 24 Hot Swap drives)
22 x Seagate Constellation ES SAS drives
Performance I''m seeing with Multipathing Enabled (driver: mpt_sas):
With only one of the two paths connected:
1 drive connected: 137 MB/s sustained write, asvc_t: 8 ms
22 drives...