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 09:38:37 2025 Auto Mode Machine = Linux oleg144-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-oleg144-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 5553 17582 546928 284418 64 8 2432 12708 735831 633392 64 16 4065 47336 1033216 926260 64 32 5991 63313 1163036 987600 64 64 6071 98298 1518251 1421755 128 4 6349 4777 286973 426492 128 8 4175 28881 549618 524387 128 16 3338 46511 425478 881842 128 32 10017 63491 1303699 794416 128 64 12937 71271 992724 1206978 128 128 11169 90767 1391557 1543594 256 4 4380 15960 600928 504861 256 8 10330 27491 805021 124091 256 16 17919 47397 927393 1040643 256 32 13591 54098 1293967 1058076 256 64 11986 30761 1248819 977189 256 128 17602 77881 1422540 1391207 256 256 17040 111745 1506359 2345409 512 4 5139 8004 526240 478942 512 8 11296 13565 875164 703215 512 16 15361 40904 1132755 1024169 512 32 15100 38237 1336492 598884 512 64 18285 39925 1282994 1179413 512 128 22963 59418 1571169 1308798 512 256 32431 56054 1589779 1610042 512 512 32651 105414 856319 2198475 1024 4 11850 13390 458971 624014 1024 8 21027 20420 869989 786507 1024 16 15337 40817 1111877 1012771 1024 32 19492 70031 1241389 1090423 1024 64 35633 56446 612359 1264413 1024 128 28603 101027 1381993 1349004 1024 256 48349 40212 1374474 1503415 1024 512 30080 80968 1657133 1317957 2048 4 8329 11866 121082 606642 2048 8 15340 12510 787720 655779 2048 16 29210 45100 762140 820526 2048 32 13112 18256 707934 634233 2048 64 29287 41458 290654 1007403 2048 128 45499 31493 569820 1302925 2048 256 58469 50393 1395193 605530 2048 512 17494 32784 1319740 1359854 4096 4 9653 9651 385105 199641 4096 8 20423 20741 773247 721364 4096 16 14569 33509 954129 442098 4096 32 43149 56746 754303 832688 4096 64 47342 19944 1120318 639493 4096 128 36630 51465 1459160 1063386 4096 256 56101 47591 1594448 1063913 4096 512 53210 33869 860335 440387 8192 4 8852 8564 191737 163012 8192 8 8003 12191 947833 280213 8192 16 20908 28745 376174 811810 8192 32 37532 32767 915410 651347 8192 64 30536 1975 1071538 240115 8192 128 15465 30465 190568 498814 8192 256 18206 23060 497752 481742 8192 512 19392 23941 1723518 268054 16384 4 5004 8667 253606 226771 16384 8 12280 16733 682608 649824 16384 16 18549 25009 486920 349012 16384 32 31386 42863 1118739 834381 16384 64 37696 66414 704354 808608 16384 128 38117 65176 1317782 1231425 16384 256 48757 66334 1739830 441081 16384 512 51482 74729 1135637 1363513 32768 4 10829 13046 394657 381023 32768 8 18171 21203 362505 534420 32768 16 23219 34094 937863 264740 32768 32 30701 34598 832626 962432 32768 64 34662 52094 466906 1027597 32768 128 48071 61155 1003366 631796 32768 256 52741 74831 737702 465428 32768 512 47647 61299 1483856 873161 65536 4 12803 14926 574403 492737 65536 8