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 28 04:56:18 2026 Auto Mode Machine = Linux oleg358-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-oleg358-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 2187 3133 581273 450541 64 8 3860 13787 640954 704914 64 16 2829 37335 789967 1033216 64 32 2373 22362 245190 1083249 64 64 2906 34079 1163036 1562436 128 4 5010 8177 579270 419494 128 8 2773 16681 809997 633995 128 16 4271 22503 889145 640042 128 32 6908 34169 953918 766076 128 64 8672 43084 1243315 1074159 128 128 5404 87612 1421023 1939522 256 4 6864 7112 422432 195126 256 8 7194 16644 805021 659625 256 16 10328 14623 1112909 931416 256 32 11994 46997 1053922 795478 256 64 4913 35759 507966 1190657 256 128 13842 27312 1523457 200781 256 256 8886 54982 721210 2030503 512 4 4760 8457 319195 352867 512 8 8951 17068 248068 229706 512 16 7122 17704 1182010 294587 512 32 8679 26937 465447 1258188 512 64 11442 71729 1422357 1320061 512 128 24171 53894 1630828 812577 512 256 21660 77504 560875 1689859 512 512 20865 71269 269621 1207261 1024 4 4243 4598 576211 347579 1024 8 13859 15884 843505 373027 1024 16 10386 10882 515305 554990 1024 32 15737 20345 541828 301363 1024 64 27496 53738 907872 555277 1024 128 29394 46297 1397280 625923 1024 256 35946 45382 1703807 1503415 1024 512 31787 49485 431359 474959 2048 4 5295 6298 347956 278941 2048 8 10434 8235 343847 176671 2048 16 9138 17020 270721 534738 2048 32 16227 32070 424995 475717 2048 64 18357 30248 457768 482233 2048 128 27820 30960 322968 847651 2048 256 27991 67368 584476 610219 2048 512 35959 72786 987938 1202599 4096 4 6487 5294 252478 233365 4096 8 6993 8375 436393 276529 4096 16 13617 15384 569458 373420 4096 32 15677 19799 455110 301688 4096 64 19771 41030 639898 330561 4096 128 26473 36801 790249 418859 4096 256 33472 35916 475675 411614 4096 512 39011 30556 423756 527090 8192 4 5150 6112 237461 198873 8192 8 2194 10126 303913 519572 8192 16 15973 18338 311944 341847 8192 32 17955 27350 619196 458473 8192 64 22859 42769 389540 411184 8192 128 24960 36521 1307358 855809 8192 256 28134 48047 886501 729276 8192 512 51314 43328 779453 922835 16384 4 10163 7011 191415 184127 16384 8 10651 12490 230847 254047 16384 16 13669 20241 278700 454909 16384 32 15855 26005 650753 681106 16384 64 19881 30819 389918 493508 16384 128 25564 27436 513764 378059 16384 256 27252 33995 539586 301359 16384 512 37267 49673 430908 613540 32768 4 5186 6212 304739 219493 32768 8 11227 11729 563799 490039 32768 16 14762 17958 490165 359759 32768 32 25450 25994 787539 385578 32768 64 22619 23240 442200 436011 32768 128