I'm new here, i met a problem, the iscsi performance is descendant heavily, i used software RAID, created an iscsi volume based on RAID5, and then connect the target with windows initiator, and run 1MB sequency write test with iometer, it has 100MB/s mostly when the test starting, but after the test ran 12 hours, the speed is 50MB/s, Is there anybody has met the problem?
Since this can be directly related to hardware, some more details are needed here.
Give us some specifics as to what you are testing, and what the settings are, in regards to your setup.
Hi Gr-R, Thank you for your reply, we just test the iscsi volume performance to see what it can be used for.
the hardware configuration is:
Supermicro motherboard X7DCX
4*2GB DDR2 physical memory, speed is 667 MHz (1.5 ns)
LSI SAS 3081E-R
Intel Dempsey/San Clemente/ICH9, Intel(R) Xeon(R) CPU E5405 @ 2.00GHz
2*1GB physical network adapter
According to the result, it's more and more better random write performance when the written date size changed from 64KB to 4MB on linux. but on windows, the random write performance is so poor, always below 10MB. Is there any operation need to do?
Hi Todd, Thanks for your reply, write back option on the LUN was enabled, and what's the meaning of the Write cache enabled on the RAID controller? I used the software RAID, not hardware RAID. thanks!