Hi folks, thought it was time to try maczfs again. I am shifting over from
ZEVO due to GreenByte's fubar of the project. Seems like the shift over to
OpenZFS is worthwhile and I'm satisfied to see some positive results.
One thing that has bothered me so far is the marked differential in speed.
Running AJA System Test I am seeing on ZEVO with lzjb compression rates
such as the following:
File Size Sweep
MB MB/sec
Read Write
128.0 1828.7 917.7
256.0 2291.3 545.3
512.0 1902.6 272.7
1024.0 1965.6 350.4
2048.0 1877.9 305.7
4096.0 1898.1 323.9
8192.0 1864.9 355.6
16384.0 1749.5 312.8
Whereas with maczfs as installed via:
http://zerobsd.tumblr.com/post/62586498252/os-x-with-zfs
I am seeing:
File Size Sweep
MB MB/sec
Read Write
128.0 390.7 82.3
256.0 285.5 93.9
512.0 290.2 84.1
1024.0 275.5 88.2
2048.0 272.7 87.5
4096.0 268.7 88.6
8192.0 281.3 88.3
16384.0 273.2 85.2
With LZJB on maczfs I am seeing about 10-30% slower rates.
Any thoughts on why we would be seeing such a remarkable difference at this
point?
-ylluminate
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