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: Thu Aug 27 07:53:03 2026 Auto Mode Machine = Linux oleg306-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-oleg306-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 1922 6448 218452 331481 64 8 4704 26423 703068 576282 64 16 4729 14786 1143223 380864 64 32 2159 31385 852702 1029254 64 64 5410 55694 1279447 1828508 128 4 5184 5551 334956 576780 128 8 5671 20205 776042 757430 128 16 7798 45055 1093856 316774 128 32 7494 17822 443033 1022989 128 64 4380 55995 847059 1102844 128 128 10796 76555 1557024 1455701 256 4 7181 12583 618584 440634 256 8 11804 19814 612235 535583 256 16 7241 32627 1158540 739590 256 32 6408 42982 1369908 690151 256 64 5261 44529 1354356 1185399 256 128 15272 58771 1262029 1455317 256 256 12030 29177 1514860 1938842 512 4 3670 5155 158957 528311 512 8 11364 7738 916237 633699 512 16 9241 14714 351654 583110 512 32 17083 19357 1190529 1026126 512 64 17956 48434 1422357 663252 512 128 23922 59875 149267 269452 512 256 25869 89842 1589779 1248678 512 512 25963 82050 739795 2024389 1024 4 9903 8084 462729 369402 1024 8 15570 19187 317820 763576 1024 16 16913 33343 578228 214718 1024 32 14689 20002 208931 336838 1024 64 14799 22517 488519 374687 1024 128 18446 37593 1582636 1352402 1024 256 24909 66963 1609925 1248970 1024 512 27056 33105 581831 557078 2048 4 7918 3477 459925 216143 2048 8 8677 8733 203984 144347 2048 16 9406 24664 721673 453706 2048 32 25780 22672 1293702 761329 2048 64 21593 36434 1527152 566364 2048 128 18581 18122 1306890 302816 2048 256 25283 38056 187648 218363 2048 512 14290 51144 1763917 394236 4096 4 5609 5293 210355 141911 4096 8 6370 11152 142055 159981 4096 16 15927 14192 330586 581485 4096 32 34434 45959 1255672 570630 4096 64 45443 40569 690126 410915 4096 128 45340 71062 675898 565261 4096 256 55392 63711 526008 1016632 4096 512 27628 50466 494572 394796 8192 4 4989 7575 346473 352480 8192 8 16985 11182 313762 247185 8192 16 2738 35010 759015 439316 8192 32 12818 22147 403227 517896 8192 64 42569 36125 591737 382306 8192 128 27702 39371 767321 669169 8192 256 32097 54896 1342292 555427 8192 512 43802 78142 797972 679935 16384 4 8505 11569 481657 310121 16384 8 11707 11697 602375 261237 16384 16 14961 19237 710089 508506 16384 32 21546 29315 846582 599202 16384 64 23451 29381 838873 674263 16384 128 27479 28948 514603 412341 16384 256 26786 36279 676240 463544 16384 512 33448 47638 807933 946173 32768 4 5915 6881 238628 219392 32768 8 8784 12098 320297 442093 32768 16 14957 16881 724217 292417 32768 32 27931 27596 574686 504013 32768 64 22452 37297 825222 573128 32768 128 35146 33491 872258 435188 32768 256 26798 50080 487720 442900 32768 512 30810 51724 681319 634020 65536 4