Hi,
our new server with 4 x E5-4620 with 256GB running OmniOS(I also tested
with Smartos and OI) is significantly
slower in filesystem and memory operations compared to our older single
socket machines.
I know the memory architecture on this system is distributed between the
cpus (every cpu got 4 x 16 GB of ram),
but the performance on just a simple dd write to the tmpfs seems quite
low to me.
Test: Writing a 1 GB File
time dd if=/dev/zero of=/tmp/testfile1 bs=128k count=8k
Mean value of 3 tests on every system.
(I also tried IOZone but the simple dd test seems to show the problem)
New System:
4x Intel(R) Xeon(R) CPU E5-4620 0 @ 2.20GHz 2,1 seconds (around 487
MByte/s)
Mainboard Supermicro X9QR7-TF+
256 GByte Ram in 16 x 16 GByte Registered ECC DDR3
Other Systems:
Intel(R) Xeon(R) CPU E5-1650 0 @ 3.20GHz 0,79 s (1296 MByte/s)
Intel(R) Xeon(R) CPU E5606 @ 2.13GHz 0,9s (1140 MByte/s)
Intel(R) Core(TM) i5-2400S CPU @ 2.50GHz 0,69s (1485 MByte/s)
The reason why i am asking is because:
When i export a ZVOL on a ZFS pool (2x6 Disks RAIDZ2 striped +ZIL)
which is writing with about 750MB/s native, over
FC then i only get 200 MB/s on the initator.
I then tried to export RAM disks (they are slower then the tmpfs) and
then tmpfs files, but the
performance over FC was the same. After that, I saw that the whole
system performs much worse than
my older ones (which have no FC).
Are there any clues what i can do about that situation ?
Is it necessary to tune the system ?
Can this be related to IRQ distribution among the 64 shown cores ?
Thx,
Franz Schober
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