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: Sun Jan 11 09:06:56 2026 Auto Mode Machine = Linux oleg359-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-oleg359-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 12948 23869 282027 470274 64 8 18587 32357 371894 586352 64 16 17927 50554 695778 533875 64 32 19248 93277 942521 789967 64 64 20474 101610 829001 1310683 128 4 16254 25432 413994 210884 128 8 22118 35409 582412 444501 128 16 27004 57353 640042 800337 128 32 14677 90324 1022989 767171 128 64 26869 138518 1142750 1142750 128 128 29555 152745 1732927 2098744 256 4 14959 23562 510866 285736 256 8 21908 36701 182088 431775 256 16 35290 56549 864661 958864 256 32 53100 106271 927393 817898 256 64 48293 126802 941213 980760 256 128 52245 144869 1924938 1579483 256 256 23203 169981 1479379 1911233 512 4 16355 22297 387017 380098 512 8 30287 40271 402165 467575 512 16 44375 81065 840566 763195 512 32 53074 106979 893740 844865 512 64 62945 120214 1350783 1171691 512 128 83713 195034 1610042 1427083 512 256 81657 188511 2071249 1861217 512 512 63563 246984 1797349 2613128 1024 4 20889 21961 291247 274898 1024 8 30508 38628 495622 646461 1024 16 50230 78358 829816 831744 1024 32 65975 108098 1220575 880512 1024 64 80528 130194 1142945 1135091 1024 128 88268 164075 1909888 1452570 1024 256 101356 190617 2035716 1882266 1024 512 126204 162412 2102484 2230218 2048 4 20969 26401 408037 357737 2048 8 29278 39138 557288 504435 2048 16 54733 51357 1080113 918826 2048 32 60972 88306 1358134 1098203 2048 64 80579 130687 1385740 1174321 2048 128 93768 174443 1454489 1418462 2048 256 116502 175822 1984824 1463909 2048 512 103705 151894 2083516 1453505 4096 4 22061 22188 330663 393611 4096 8 34322 41410 617230 604929 4096 16 56506 62210 826638 632105 4096 32 73666 101423 1556174 1280378 4096 64 96222 136175 1311559 1189263 4096 128 88346 160118 1675135 1327265 4096 256 106564 174240 1708792 1383821 4096 512 125014 211133 2506617 1840804 8192 4 21280 24002 366121 339960 8192 8 36225 43750 419282 543599 8192 16 56331 65094 920757 777021 8192 32 73338 101145 1225260 967639 8192 64 96524 135061 1480014 1219044 8192 128 105857 175496 1718433 1717745 8192 256 113302 175534 2221945 2155187 8192 512 115503 205216 2381989 2068641 16384 4 21988 23662 343553 333258 16384 8 35743 41855 675323 536423 16384 16 57057 65014 885859 737121 16384 32 72026 94132 1254513 732181 16384 64 86262 148098 1612270 1420005 16384 128 114364 169785 1503550 1509627 16384 256 119407 168089 1902490 1830429 16384 512 118481 182429 2071560 1432318 32768 4 20087 22626 369259 310479 32768 8 36207 40396 546060 535232 32768 16 53411 65176 775685 805683 32768 32 73109 98473 1122502 857012 32768 64 94987 125502 1415775 1387252 32768 128 107282 154261 1472663 1530998 32768 256 113731 160970 2033006 1580233 32768 512 128621 191306 2399514 1670994 65536 4 21199 22020 354151 327976 65536 8 33467 38699 494528 543525 65536 16