Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Fri Jul 3 05:42:40 2026 Auto Mode Machine = Linux oleg348-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg348-client.virtnet/iozone-file 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 64 4 3675 10179 16255 538156 64 8 5814 11843 901377 866463 64 16 9223 44875 1204796 811459 64 32 4587 55077 1330167 293755 64 64 6736 87075 1363961 1780008 128 4 6440 9178 540217 360605 128 8 10272 25467 947186 699227 128 16 8299 35514 1121270 1102844 128 32 8345 33282 1406136 1000121 128 64 17807 63461 1067750 1243315 128 128 10326 103387 302666 2202044 256 4 6421 9041 592636 428159 256 8 4023 5730 780445 185646 256 16 6626 23060 999940 646518 256 32 19568 48940 1044693 1195962 256 64 20226 84714 487664 1070737 256 128 8028 127480 1610276 385571 256 256 24558 147983 1570244 279488 512 4 9000 14254 481195 365727 512 8 7625 13513 721163 860781 512 16 14133 19895 725303 119825 512 32 27363 36513 904658 750656 512 64 20311 66640 782951 895230 512 128 27981 71528 1040545 613075 512 256 17530 54834 1614885 1361920 512 512 36260 73680 1747618 1861217 1024 4 8071 5034 253154 178988 1024 8 6533 9210 211963 787084 1024 16 23293 39992 1256644 635274 1024 32 15786 26414 942125 232150 1024 64 29444 79657 1580306 1030263 1024 128 28778 95637 1166221 1380217 1024 256 27237 75482 1141730 133438 1024 512 54847 37064 1232130 1799462 2048 4 6117 8538 206118 369605 2048 8 9325 8017 960111 274712 2048 16 18326 12217 401871 669060 2048 32 26672 65358 351516 514712 2048 64 71568 35980 1613798 946882 2048 128 27024 52156 1617749 1287304 2048 256 71470 94937 2164908 348295 2048 512 25990 43097 481557 289468 4096 4 7806 8988 337006 248469 4096 8 5813 7194 287886 119469 4096 16 12080 46848 1188276 130019 4096 32 18703 17810 1256774 580581 4096 64 17445 23851 1534080 478617 4096 128 21673 19227 328651 754303 4096 256 20231 17720 1727521 375337 4096 512 15399 103008 627350 927097 8192 4 5454 3864 393164 338050 8192 8 5395 9438 399008 352234 8192 16 7038 7820 223166 117948 8192 32 11789 18437 254766 256561 8192 64 19726 25073 425846 376834 8192 128 10387 35943 1064434 568297 8192 256 60645 99644 1125743 905399 8192 512 25485 30364 592636 174941 16384 4 9980 10169 134280 280087 16384 8 15731 17715 1118448 377694 16384 16 18855 21173 633956 342046 16384 32 23660 32589 361453 485019 16384 64 27166 43146 462029 736915 16384 128 37710 41810 407654 500091 16384 256 43701 54670 535495 486779 16384 512 36558 57917 522066 891166 32768 4 4541 5116 294989 155015 32768 8