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: Sat Aug 8 02:26:21 2026 Auto Mode Machine = Linux oleg244-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-oleg244-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 1477 2560 492717 61373 64 8 2831 5320 561808 512471 64 16 1783 5722 1049372 842003 64 32 2444 3191 1255511 74507 64 64 4970 69564 916769 1599680 128 4 2708 5557 624409 179567 128 8 4601 7199 836500 706589 128 16 6803 24796 948860 913347 128 32 6704 75025 1206978 325809 128 64 6000 31403 1363288 1040839 128 128 4855 51548 1451764 1967960 256 4 2024 11030 535583 518263 256 8 9834 19509 775933 570288 256 16 5431 12366 1079348 463858 256 32 14941 51415 904732 326980 256 64 16551 92717 1368162 1093639 256 128 17406 22720 1212164 690151 256 256 13413 144226 271160 1907837 512 4 3581 5479 641651 219090 512 8 6560 12882 430978 373423 512 16 4889 28395 358044 711133 512 32 19928 54088 99361 229805 512 64 9521 27605 310114 1115688 512 128 14118 70165 1399189 1255246 512 256 17787 48002 445276 1127402 512 512 24129 28859 1414860 1791352 1024 4 5175 4067 449320 255945 1024 8 7762 9206 453495 204514 1024 16 20126 32826 1125277 916004 1024 32 34079 65003 880331 1526390 1024 64 37417 15573 650082 569865 1024 128 25150 31619 754587 1049394 1024 256 39416 67604 1389594 1361404 1024 512 48247 60072 523469 1556257 2048 4 7255 4298 212407 159587 2048 8 6488 15291 345423 524999 2048 16 20645 29048 675001 813918 2048 32 10526 24950 239361 1034333 2048 64 17623 32864 881669 1203947 2048 128 33221 48248 1107548 804089 2048 256 36322 70201 1265868 622512 2048 512 32009 69738 920007 1001530 4096 4 5801 5694 334285 302511 4096 8 12627 12212 337344 417576 4096 16 15964 10973 418125 209031 4096 32 15284 31681 822798 741764 4096 64 16790 26449 550763 395596 4096 128 22989 41778 630458 353380 4096 256 39845 36925 746924 496072 4096 512 36614 51156 804383 958334 8192 4 4465 5423 212729 223337 8192 8 6461 7040 332290 225642 8192 16 13596 19315 416386 685866 8192 32 12490 27130 555687 499205 8192 64 15263 30096 919402 673960 8192 128 29505 40560 1005646 546974 8192 256 39416 54564 1026435 514476 8192 512 34751 43997 873542 403326 16384 4 4927 5243 161324 199325 16384 8 9313 14597 216831 262375 16384 16 11176 14656 564204 415309 16384 32 31934 27571 434518 608412 16384 64 18630 24371 498980 480482 16384 128 21428 25230 350955 458549 16384 256 20577 36759 853066 675211 16384 512 30742 29195 822733 462736 32768 4