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 Oct 24 10:34:29 2025 Auto Mode Machine = Linux oleg425-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-oleg425-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 6494 20780 592827 476959 64 8 7711 10634 942521 460591 64 16 6225 55555 955947 598110 64 32 10465 67875 863676 1210227 64 64 4420 80398 1204796 1518251 128 4 12944 20755 556454 82738 128 8 11329 9090 726674 68271 128 16 24647 56662 921183 417212 128 32 23512 62837 1346196 883293 128 64 15976 96320 1254941 1377278 128 128 9278 108947 1319723 1278855 256 4 5239 7799 746272 505098 256 8 13194 15907 790209 220670 256 16 25840 67122 913973 787890 256 32 39919 80353 1012194 917096 256 64 23312 104198 1128110 1128110 256 128 35261 132172 1489641 1430119 256 256 47679 133819 1694118 1817419 512 4 9922 20380 556515 222219 512 8 20561 18745 872320 828566 512 16 39959 68920 991998 840895 512 32 38280 50484 1066380 939486 512 64 28487 79135 967855 1169140 512 128 43865 120382 1216149 1230786 512 256 29602 61265 1434711 1565443 512 512 59465 190113 1580419 2265742 1024 4 11272 14373 255945 549312 1024 8 14789 35349 522450 707129 1024 16 31834 22962 1066859 1042770 1024 32 39666 79123 1223705 1052480 1024 64 27420 62389 1477555 1248607 1024 128 70233 29816 1495042 321099 1024 256 47930 117080 1612948 1412443 1024 512 64774 152537 1741104 1535119 2048 4 10843 19027 447840 208176 2048 8 20459 21425 867774 716078 2048 16 19161 13949 1037080 1058942 2048 32 19442 46523 1306890 1189444 2048 64 26540 43570 1456462 1280015 2048 128 40349 133804 1516904 1241175 2048 256 43555 37374 1531781 1311078 2048 512 55266 140890 1526066 1452276 4096 4 9800 7003 131767 129677 4096 8 14902 22254 844891 769197 4096 16 35362 25965 1086727 932583 4096 32 26056 21863 1183854 423715 4096 64 27253 53641 1255672 1092880 4096 128 31268 40501 1426685 310258 4096 256 57195 49107 1075098 243331 4096 512 32199 54351 1461270 1442255 8192 4 11330 9202 261541 141617 8192 8 22474 18605 710678 715145 8192 16 18741 27766 1038409 952326 8192 32 33266 40319 352495 253708 8192 64 29447 66444 396512 326921 8192 128 39934 37580 1550613 1253968 8192 256 36823 49638 1536949 1146363 8192 512 55304 64441 1288676 1205613 16384 4 8546 8848 473813 478238 16384 8 16715 17443 707064 686585 16384 16 26033 26869 970383 390039 16384 32 40484 35213 929699 727468 16384 64 33386 44068 533090 480442 16384 128 48879 82721 1029986 1251930 16384 256 37527 59108 870144 923043 16384 512 52197 73098 1509495 1182539 32768 4 8854 9470 277492 296849 32768 8 14993 21848 899629 550546 32768 16 25720 37535 495935 871649 32768 32 30393 40044 624674 566960 32768 64 33569 42678 358061 997265 32768 128 37211 46409 1146214 847745 32768 256 51776 67100 1045594 1168074 32768 512 44939 64910 1365950 1262485 65536 4