Sorry this is not related directly to ceph anymore, but as I'm pretty shure that here are some people who did similar tests already I ask.
Iozone tests on my SATA disks shows:
Auto Mode
File size set to 4096 KB
Command line used: iozone -a -s 4m
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random random bkwd record stride
KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
4096 4 1195553 2158056 3530734 3828122 3290024 2219963 3212508 2754594 3112404 2164855 2159141 3740604 3904688
4096 8 1347778 2492796 4108241 4487004 4095510 2751065 3779279 3379332 3817913 2580797 2598755 3973321 4399673
4096 16 1457180 2801306 4922872 5504946 5347310 3187474 4763181 4835578 4428023 2870101 2870101 5178081 5353976
4096 32 1484631 2888923 3433360 5051705 4505833 2534724 4413235 5375755 5820121 3196965 2803592 4801789 5867831
4096 64 1358113 2736168 4654774 5278308 5424983 3245890 4730393 5519094 5572803 3052133 2819234 4669958 5299475
4096 128 1382818 2741407 4747386 5558378 5689064 3357537 4904602 5761565 5883908 3060834 2985308 4824714 5396016
4096 256 1357683 2732251 4882301 5627567 5657217 3427196 4887857 5818150 9614850 3005151 3047802 4768469 5506711
4096 512 1392344 2669834 4988629 5761565 5784846 3362795 4823359 5497899 8552280 2671911 2933818 4692920 5424983
4096 1024 1343457 2549015 4622213 4977067 4623457 3119752 4380601 3992713 5818150 2218817 2901120 4176149 4686519
4096 2048 1308264 2360908 4063542 4175134 4027344 2765680 3930595 3086681 4257917 1938423 3376675 3543113 3908241
4096 4096 1277617 2221111 3552638 3680502 3633793 2556602 3516281 2528382 3546038 2539220 2571141 3543844 3627654
And to my SSD
Auto Mode
File size set to 4096 KB
Command line used: iozone -a -s 4m
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random random bkwd record stride
KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
4096 4 618831 1613314 3919833 4063542 3447830 1786999 3519162 2278253 3373360 1811686 1767875 3835814 3942321
4096 8 677364 1751295 4204769 4371684 4031124 2104910 3817065 2675239 4054910 2065432 2053336 4284464 4325455
4096 16 709507 1931232 5099691 5265366 5252488 2353791 4643451 3210107 5271829 2251678 2199781 5299475 5369035
4096 32 725476 1986386 5418140 5753847 5833956 2451183 5563779 3465216 5674032 2348643 2332698 5642353 5726993
4096 64 738575 2044782 5572803 5835938 5988509 2564616 5971855 3482778 5258919 2378558 2366110 5125556 5625724
4096 128 742437 2051130 5696610 6105563 6272759 2607037 6015769 3599532 6522830 2419425 2419425 5875858 6051794
4096 256 744722 1912102 5438722 6207035 6311938 2560030 6077484 3633793 9846293 2436582 2531363 5869835 6066754
4096 512 747022 2057270 6077484 6370451 6503078 2642729 6086096 3574815 10160758 2233528 2479484 5784846 6195843
4096 1024 730008 1852515 5113352 5375755 5340661 2457143 4686519 2915397 6451792 1958979 2427973 4546375 5238075
4096 2048 714969 1812259 4408705 4541567 4423462 2218817 4267436 2327326 4622213 1778674 2921843 3693955 4338563
4096 4096 700053 1682188 3734100 3727618 3734100 2023826 3621537 2051130 3633793 2003061 2055056 3605576 3744681
So do I test something wrong? Or do you guys agree that this SSD is just damn slow?
Thanks
Andi
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