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: Wed Apr 22 11:01:22 2026 Auto Mode Machine = Linux oleg406-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-oleg406-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 3591 13015 877797 551422 64 8 8243 17291 877797 831569 64 16 10120 47834 1363961 955947 64 32 11513 70164 1232453 842003 64 64 10882 118944 2203800 2067979 128 4 7725 17465 748976 137630 128 8 9615 12980 895074 814915 128 16 17209 49227 1206978 1705404 128 32 14415 78331 1802755 1185654 128 64 16550 88216 1406136 1391557 128 128 14940 109324 1827299 1858934 256 4 11480 16094 679237 856386 256 8 17832 30192 1158540 701422 256 16 22444 61290 757326 1384034 256 32 17880 77043 1829808 1938842 256 64 23340 78987 1752173 1354356 256 128 33143 123492 1619994 1463250 256 256 25056 126742 2330140 1868008 512 4 13253 17479 621413 610287 512 8 20678 29150 988345 568899 512 16 28434 49516 1736314 911184 512 32 36451 71052 1299295 1193838 512 64 32047 82330 1078159 1264113 512 128 49820 117645 794832 1862832 512 256 47424 149746 1537424 1257451 512 512 40439 93110 1835760 2317080 1024 4 13698 16747 788240 608800 1024 8 18326 30670 1054547 740919 1024 16 24449 46047 1349004 1006836 1024 32 44231 71249 1296083 533350 1024 64 57476 92973 1530742 1071116 1024 128 54430 122974 1667426 1577984 1024 256 57807 109109 2236023 1528019 1024 512 49261 117407 1577404 1762539 2048 4 16788 18429 675691 620803 2048 8 26484 31641 949499 888141 2048 16 36248 57174 1267362 1259557 2048 32 59254 74348 1487484 1262704 2048 64 53914 119028 1339497 1488257 2048 128 77391 130123 1415191 1288849 2048 256 85159 144497 1616531 1589902 2048 512 88680 160779 2565840 1691329 4096 4 16655 18229 671119 605376 4096 8 26195 29506 1079082 860852 4096 16 41500 51496 1459780 784368 4096 32 56644 78414 1386613 1176960 4096 64 68658 92930 1615893 1280855 4096 128 79636 122174 994446 981773 4096 256 84621 137722 1430248 1033822 4096 512 78637 141256 1791845 1546787 8192 4 16195 18203 906785 740355 8192 8 28304 30533 1103615 1016025 8192 16 43379 51971 1256628 1217920 8192 32 61373 75321 1659265 1264582 8192 64 74837 100613 1639706 1395783 8192 128 91552 111284 1774706 1430951 8192 256 91319 147614 1556231 1556231 8192 512 99471 122748 1911762 1538669 16384 4 15953 17179 676887 617099 16384 8 26349 29824 1037951 882276 16384 16 46425 48926 1374504 1168941 16384 32 49620 66676 1531223 1277294 16384 64 69183 91957 1204362 750632 16384 128 80044 98218 1495305 1857142 16384 256 81670 129852 1859252 1297332 16384 512 100580 134388 1931200 1542185 32768 4 17026 16611 816888 696493 32768 8 27375 31415 1218454 882496 32768 16