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 Oct 1 19:16:17 2026 Auto Mode Machine = Linux oleg208-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-oleg208-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 7310 12179 679917 307907 64 8 5007 31433 780776 312204 64 16 8222 41529 621657 863676 64 32 11436 38859 1226821 998622 64 64 8131 75919 1049372 1734015 128 4 3803 13149 637004 576161 128 8 9321 20870 1487977 345965 128 16 12451 29947 706589 992724 128 32 13257 22350 504196 947186 128 64 15019 58959 1436229 272273 128 128 9539 84762 1521718 345965 256 4 8133 12196 304365 544823 256 8 9353 20444 525621 322851 256 16 5118 13214 1213534 735537 256 32 8751 23771 1400278 1070737 256 64 9506 33190 1361224 1219045 256 128 18001 90399 543720 1471270 256 256 15059 141995 1652404 2205688 512 4 6273 6512 253216 615359 512 8 12791 16636 1022219 440256 512 16 16957 11838 248068 637650 512 32 8708 67138 1279935 474078 512 64 9858 25901 1270846 125673 512 128 49264 110201 2097550 1174254 512 256 35794 148401 1422357 1600443 512 512 33318 103834 1815584 1248678 1024 4 8046 12548 265485 363001 1024 8 12240 12294 1259592 466955 1024 16 19421 34167 729344 371800 1024 32 19352 58467 1950656 796277 1024 64 35378 68987 775292 878171 1024 128 36626 80383 1049394 1338911 1024 256 37584 63405 903099 1448162 1024 512 53286 73647 1153071 1692394 2048 4 5028 7030 220453 254661 2048 8 19938 11326 899864 479514 2048 16 20696 19266 642583 410494 2048 32 23122 31992 690742 441464 2048 64 18788 65454 986577 790765 2048 128 29741 28894 1530689 1346425 2048 256 36544 63986 1571864 482558 2048 512 19536 41906 664248 516662 4096 4 7293 9495 168698 148464 4096 8 12177 10272 340082 246063 4096 16 18988 25036 630365 575042 4096 32 33669 29629 559407 407764 4096 64 40295 48116 1540407 1274773 4096 128 31030 51278 1026043 711593 4096 256 37132 61122 1266503 1349154 4096 512 35948 72983 1739239 1265011 8192 4 7532 3182 591697 516161 8192 8 13769 15630 407135 739542 8192 16 22736 25397 582982 589271 8192 32 27177 33021 999270 869827 8192 64 40218 35178 1027448 847074 8192 128 32276 44083 989145 673458 8192 256 45080 69799 755162 1096046 8192 512 44074 68778 689389 716951 16384 4 8379 9346 481742 521582 16384 8 13849 15405 513944 497675 16384 16 20611 19111 728989 729182 16384 32 28723 36444 988715 599992 16384 64 25621 32665 717713 526578 16384 128 34226 56125 729763 690288 16384 256 27482 52777 899624 361119 16384 512 39738 51551 804509 728016 32768 4 6929 8540 334815 200197 32768 8 13227 14678 574263 385505 32768 16 19141 23814 674405 362466 32768 32 25977 35786 764357 654157 32768 64 26844 33657 1076797 798985 32768 128 32669 45278 512809 378034 32768 256 33231 53146 1181337 887230 32768 512 39924 70137 761494 611642 65536 4