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 Sep 17 18:28:21 2026 Auto Mode Machine = Linux oleg243-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-oleg243-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 3066 6889 453587 107210 64 8 3833 15348 743988 720041 64 16 1433 19686 173429 877797 64 32 3529 50545 1310683 983980 64 64 1070 62677 1679761 1279447 128 4 3578 2615 692017 163889 128 8 6446 10168 847059 445978 128 16 3841 14787 870405 640042 128 32 11251 61274 1185654 1111981 128 64 15212 96165 2098744 2132084 128 128 14010 143172 1424795 3053774 256 4 8932 9709 1178892 901693 256 8 7296 25528 934659 746272 256 16 7846 19181 1361224 958864 256 32 7082 32392 1334162 1032636 256 64 16169 138963 1514860 483056 256 128 10329 99884 1662639 1407621 256 256 16337 86691 1362952 2097948 512 4 8950 5477 221166 518239 512 8 13458 22098 599553 780390 512 16 9505 17295 772252 171239 512 32 13100 14649 1071167 850554 512 64 15970 23006 1426135 1005938 512 128 11108 74462 725058 1185272 512 256 27538 52422 560144 664073 512 512 11290 64613 1674052 2253852 1024 4 2889 10274 625923 222274 1024 8 8906 6631 146202 732953 1024 16 11690 15406 366627 432228 1024 32 27303 27639 1336827 904621 1024 64 14813 21846 1542286 1046836 1024 128 11439 17631 1067654 1418508 1024 256 32248 97737 1675884 2110750 1024 512 33583 146098 1340164 772225 2048 4 11181 4226 186726 286830 2048 8 8284 12906 681534 530151 2048 16 20325 25832 716556 305487 2048 32 9695 20561 1146118 166195 2048 64 15617 22049 1292145 266703 2048 128 14889 16367 1394966 587313 2048 256 18675 38817 464400 337352 2048 512 17736 14016 287434 138155 4096 4 3467 7736 292653 405867 4096 8 9345 12242 171102 273561 4096 16 10451 19498 656000 628038 4096 32 13688 16793 352712 235090 4096 64 20577 47160 517890 440376 4096 128 19066 36845 612171 866890 4096 256 42741 45466 626595 788617 4096 512 35379 73339 908612 689102 8192 4 1861 6350 184230 342362 8192 8 9776 13546 416346 372278 8192 16 13469 10644 994297 718224 8192 32 18673 22495 459577 235381 8192 64 15304 23960 456712 334532 8192 128 17067 29915 553254 364154 8192 256 17224 37340 579678 424389 8192 512 37959 49260 700592 507996 16384 4 4205 5923 427735 113082 16384 8 7475 9183 310720 540992 16384 16 12230 15299 527901 478685 16384 32 15816 26009 495179 982088 16384 64 26113 42450 415141 770399 16384 128 34093 33543 963080 1258280 16384 256 28441 50555 702870 624558 16384 512 25732 40076 990982 537779 32768 4 5574 5370 319133 365820 32768 8 10265 11599 356677 385438 32768 16 16888 20506 930434 461022 32768 32