Intel SSD 530 240GB vs Samsung 840 PRO 256GB

Dell R620, 2*E5-2643, 32GB RAM, RHELS 6.5, Iozone 3.420,SSD分区4K对齐, ext4打开trim

./iozone -a -i 0 -i 1 -i 2 -y 4k -q 1m -s 64g -Rb ./test.xls

结果是除了大块数据的随机写840大幅落后外其它的小胜530,具体结果如下:

Intel SSD 530 240GB:

record size 4 8 16 32 64 128 256 512 1024
Writer Report 524440 523974 526780 527053 526968 526036 527036 525766 525890
Re-writer Report 522612 522613 522275 523206 522439 523246 522352 521813 522232
Reader Report 401357 400040 402251 404237 404396 403728 404063 403219 402921
Re-reader Report 400585 399216 400826 402105 402526 402288 403591 402457 402526
Random Read Report 24057 42185 71473 116760 181263 257251 320765 373026 400579
Random Write Report 265987 367024 436929 485591 506996 523238 522900 522817 522449

Samsung 840 PRO 256GB:

record size 4 8 16 32 64 128 256 512 1024
Writer Report 531851 532568 532486 534077 535260 535288 535185 535542 535103
Re-writer Report 529750 530555 530921 530615 530606 530297 530888 530316 531189
Reader Report 527696 527396 527468 527315 527693 527813 527855 527261 527416
Re-reader Report 527420 527422 527873 527182 527601 527822 527689 527391 527203
Random Read Report 34822 58758 94271 145413 216819 295532 338092 374540 391692
Random Write Report 269031 373047 407259 288842 286163 284136 285640 290691 295829