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 Aug 21 22:15:07 2026 Auto Mode Machine = Linux oleg628-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-oleg628-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 1764 5509 474430 592827 64 8 2977 12906 889431 769584 64 16 4852 32357 1143223 153408 64 32 7329 67585 213246 852702 64 64 6506 92093 1638743 1599680 128 4 3178 9944 652488 633247 128 8 10743 24610 934004 836500 128 16 5609 18798 1217930 1024942 128 32 12381 50453 983630 1424795 128 64 17780 75564 1579934 1455701 128 128 10017 105521 1622919 1467639 256 4 7136 14525 636553 602614 256 8 12412 24639 427307 691930 256 16 13531 34773 590031 117428 256 32 14971 46911 1384034 805021 256 64 14417 66892 1274008 499925 256 128 27592 88608 711178 675816 256 256 15274 47584 1740810 969251 512 4 8673 14014 655558 269757 512 8 8468 13469 866338 799865 512 16 15190 42012 946526 944444 512 32 35560 65690 1210664 1150351 512 64 13165 33126 1500891 1174254 512 128 19541 68191 1450212 1418599 512 256 12323 37087 934173 1662389 512 512 36399 100510 1062686 574069 1024 4 5945 10382 501935 396917 1024 8 12256 11459 408119 486251 1024 16 11573 43921 758586 1064479 1024 32 22704 65397 555277 1053512 1024 64 35941 86692 1000037 361687 1024 128 46581 87513 1000037 1400926 1024 256 44442 82975 1633188 1573360 1024 512 23569 44886 145805 1158358 2048 4 4818 6527 512746 288448 2048 8 8573 10424 333605 174582 2048 16 15677 29790 1183055 375158 2048 32 21968 21372 388389 590219 2048 64 23788 29340 228925 1255690 2048 128 30494 66359 1630647 383379 2048 256 27985 61577 676116 1252577 2048 512 26680 97120 617634 1306095 4096 4 7632 9425 467787 284624 4096 8 10873 12365 409934 365196 4096 16 21642 20257 368249 334532 4096 32 24937 28465 782261 660642 4096 64 26763 42813 303473 780626 4096 128 31644 41863 1684828 407851 4096 256 37110 59540 840716 452246 4096 512 30711 52108 481879 851381 8192 4 7139 2640 404685 268652 8192 8 13450 14616 387624 331645 8192 16 17663 20570 571464 338190 8192 32 29476 26466 713837 593844 8192 64 28024 45608 1115764 553548 8192 128 29490 54540 482880 599753 8192 256 42886 64297 738477 841144 8192 512 36691 66640 663856 1081283 16384 4 6808 7977 190354 236465 16384 8 10313 14526 278426 426811 16384 16 34754 26076 721284 623391 16384 32 22775 37844 819398 578287 16384 64 33587 35410 966100 787391 16384 128 45517 43744 1142073 649002 16384 256 41552 69248 1155516 624054 16384 512 33517 50704 1301978 734576 32768 4 7872 8890 206880 286895 32768 8 12528 14671 481401 337671 32768 16 16827 24745 531656 438849 32768 32 29975 36135 484254 583880 32768 64 29703 37567 992756 723325 32768 128 42741 55340 730270 718944 32768 256 36405 57419 707424 651672 32768 512 45417 64484 993452 750852 65536 4