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: Wed Aug 26 21:23:43 2026 Auto Mode Machine = Linux oleg204-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-oleg204-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 1324 11894 651849 658243 64 8 3681 15318 771797 789967 64 16 2700 8978 477808 818885 64 32 2893 8837 1255511 1363961 64 64 2151 61010 1679761 1780008 128 4 4707 9840 633995 542400 128 8 8107 16102 757430 786271 128 16 3145 18832 1024942 234871 128 32 7717 22602 1451764 1231904 128 64 9244 54677 1421023 354649 128 128 7815 95599 934004 1504659 256 4 3136 7315 91790 237301 256 8 4646 5427 517016 627623 256 16 6269 13987 1117543 941213 256 32 11297 22084 1718521 764334 256 64 12577 25343 646518 1361224 256 128 16389 64793 1506359 1673001 256 256 7734 69774 598249 775373 512 4 9244 9821 300986 547575 512 8 6170 15736 500484 494150 512 16 10476 24767 1082507 222403 512 32 14694 32231 1358474 1137555 512 64 19886 62814 1528669 707152 512 128 23850 67761 1701913 1480200 512 256 27088 79963 759685 802555 512 512 28364 77214 1747618 2216629 1024 4 5262 6615 615341 191118 1024 8 11144 14214 500940 779938 1024 16 9741 28640 751813 915028 1024 32 30463 18890 1236742 265632 1024 64 17502 45235 1130312 719568 1024 128 25454 35105 895194 1343938 1024 256 42954 85233 1410588 1418508 1024 512 37756 57700 1026078 753396 2048 4 7779 6351 423320 443104 2048 8 16505 8812 463874 468632 2048 16 21804 19940 441578 363967 2048 32 26533 30113 1252577 280233 2048 64 16061 28493 623642 262193 2048 128 28172 58873 1581414 1162246 2048 256 41791 71550 1701042 1403858 2048 512 26617 32349 810156 595002 4096 4 4623 8699 159378 334474 4096 8 10042 19754 335211 570953 4096 16 14648 11708 588416 332950 4096 32 21383 28299 512635 255345 4096 64 29642 46738 511796 666227 4096 128 20713 29454 939211 887765 4096 256 24726 33271 739338 830836 4096 512 20628 35820 462199 878954 8192 4 4426 5840 400137 315551 8192 8 12503 19044 692655 383625 8192 16 14405 17554 264831 545983 8192 32 15266 17548 471431 301729 8192 64 28901 37116 718029 284059 8192 128 23480 28114 925644 1195919 8192 256 28188 43620 545810 562133 8192 512 42940 54513 1271885 592207 16384 4 6279 6926 158287 153184 16384 8 8266 7756 212991 275208 16384 16 11453 18475 503846 567648 16384 32 21008 21087 600365 600082 16384 64 22976 31567 595108 486534 16384 128 18419 32114 573791 993216 16384 256 22431 41529 753942 582606 16384 512 23875 45850 575256 483001 32768 4 5320 4811 165168 146638 32768 8 7392 9251 287342 245438 32768 16 13057 12388 600071 352472 32768 32