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: Tue Sep 8 07:34:18 2026 Auto Mode Machine = Linux oleg343-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-oleg343-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 4235 5544 598110 496362 64 8 3666 3812 627470 73993 64 16 6786 12241 926260 754443 64 32 2942 45584 1049372 763021 64 64 3282 65379 1183548 1105556 128 4 5269 6515 631014 624409 128 8 5944 19990 752124 819893 128 16 8529 61981 1142750 940549 128 32 12378 34050 1363288 1142750 128 64 9033 44833 1278855 1294270 128 128 9135 91807 1346196 2326073 256 4 5615 6200 98311 471600 256 8 3235 22040 100945 729540 256 16 16249 22557 868157 198004 256 32 6360 46672 1076103 721210 256 64 9287 41918 988889 894929 256 128 16346 29853 1514860 1430119 256 256 17006 62880 1588832 532133 512 4 7484 11868 704137 291904 512 8 8134 14702 370204 420761 512 16 20273 41765 948197 861818 512 32 20055 60643 1210664 941133 512 64 11859 26964 1379416 1030064 512 128 12963 53278 873740 1113374 512 256 25533 55981 1541840 1483267 512 512 35993 77977 1723770 2235086 1024 4 10481 6092 397689 113868 1024 8 9831 10240 440427 457992 1024 16 25426 31883 598201 244799 1024 32 19027 37140 568884 446007 1024 64 14903 68144 740408 801927 1024 128 16803 110357 1467458 366627 1024 256 18007 50146 771670 1602715 1024 512 15382 52244 1065535 296229 2048 4 5268 9769 326591 294712 2048 8 10777 8466 581351 205600 2048 16 19392 31137 1156456 654530 2048 32 18329 22570 579351 321807 2048 64 23521 39880 603615 1224892 2048 128 35587 42847 1553669 786782 2048 256 41182 37994 754045 591560 2048 512 23991 56468 406743 353716 4096 4 6941 8204 410375 446035 4096 8 10190 12080 380567 340142 4096 16 16193 22581 681881 525799 4096 32 18245 28290 445168 501780 4096 64 22622 41068 286972 1082209 4096 128 23307 64322 921281 1395171 4096 256 42331 66291 1505447 827953 4096 512 29996 76397 930260 471407 8192 4 6986 9068 190969 663856 8192 8 10199 10186 211717 421442 8192 16 17190 17804 161984 249072 8192 32 17249 26537 824136 536160 8192 64 24786 47654 597386 1321945 8192 128 30867 46108 1005146 583765 8192 256 45001 54054 532223 919304 8192 512 37002 46806 1203796 1257225 16384 4 12601 6655 109911 568866 16384 8 8101 10129 542016 228144 16384 16 19009 24266 549853 863084 16384 32 19062 33814 1006512 283430 16384 64 20912 20576 405827 622516 16384 128 26201 41706 556654 448470 16384 256 30933 46990 1204341 540031 16384 512 34884 59618 936171 932500 32768 4 6537 6368 185966 201120 32768 8 9377 13481 244822 464833 32768 16 14951 18372 503626 441747 32768 32