I don't know enough about these tests to make any real definitive
statements, but the results show HFS peaking around 2GB/sec, and ZFS
peaking around 6GB/s. Sounds good to me, though it's perplexing that
throughput goes down as file size goes up. --matt
Yes, I'm not entirely sure what is going on, but basically just using
time to check how long a iozone -A takes to run:
hfs# time iozone -A
real 6m52.913s
zfs# time iozone -A
real 17m2.767s
Pulling out the end data, randomly:
Output is in Kbytes/sec
KB reclen write rewrite read reread
hfs:
524288 4 50259 57859 498526 677862
524288 8 69938 72726 596500 888537
524288 16 70807 77607 778664 942680
524288 32 80059 64811 1131027 1142847
524288 64 64146 76311 1150897 1135341
524288 128 64722 76543 1188676 1220951
524288 256 61233 64857 1234472 1272219
524288 512 59642 66703 1216507 1196796
524288 1024 64701 57436 1095813 1061215
524288 2048 89257 71440 1011559 997499
524288 4096 59390 62918 816415 814473
524288 8192 70201 61838 807098 816163
524288 16384 55456 62131 770388 675465
zfs:
524288 4 69946 61442 35812 33750
524288 8 79214 59965 35276 34657
524288 16 79565 61427 37954 37884
524288 32 78144 58469 35089 39305
524288 64 79383 62301 33978 38365
524288 128 78349 63518 35415 37586
524288 256 79343 64975 38946 35096
524288 512 76837 65248 36305 37858
524288 1024 80828 65693 35733 36306
524288 2048 78684 64832 35045 34183
524288 4096 74112 60109 37463 35811
524288 8192 78958 61731 31899 45881
524288 16384 77999 61969 40890 44041
Which would imply my read and reread values are pretty poor. flatlined
around 30MB/s, when hfs is over 1GB/s.
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