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 19 01:01:47 2026 Auto Mode Machine = Linux oleg109-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-oleg109-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 3164 6902 608965 488236 64 8 1678 16489 780776 666414 64 16 1953 22947 913649 752329 64 32 1449 20350 1143223 688639 64 64 3627 31389 1452528 1562436 128 4 1995 3390 576780 841746 128 8 4341 3417 707520 324039 128 16 2755 14996 493989 242400 128 32 5295 28539 1185654 1123617 128 64 5990 46559 1363288 1332828 128 128 7465 48652 1373754 1598754 256 4 5233 7360 608074 326087 256 8 15441 19737 904732 47241 256 16 11198 32343 1190657 969251 256 32 7484 41491 1260547 646518 256 64 8019 57297 1534342 1304976 256 128 10783 70024 1219045 1287760 256 256 9411 80401 1561112 1422540 512 4 6520 6904 618371 84374 512 8 7969 16252 296457 604617 512 16 13071 26194 875164 385835 512 32 9035 37517 1326585 1115688 512 64 12744 55895 1236455 1125040 512 128 15649 38024 1451192 1455126 512 256 26475 69058 1635797 1696534 512 512 24854 62492 1854787 1778004 1024 4 2089 4840 629778 778806 1024 8 6468 19091 921705 1073525 1024 16 17128 22279 717046 121674 1024 32 10592 17101 285478 696126 1024 64 27702 43567 721139 1159609 1024 128 25523 37806 1458489 430107 1024 256 15651 22838 1414304 162406 1024 512 10523 21173 1554004 1563622 2048 4 3029 6370 319699 176247 2048 8 13486 10709 349784 466089 2048 16 9861 20296 319806 397134 2048 32 14164 15325 516507 1372675 2048 64 23903 13684 419926 1096381 2048 128 23559 20054 295534 1231389 2048 256 15629 61006 622107 322012 2048 512 48208 43927 1235107 1338453 4096 4 3839 5527 212152 213290 4096 8 3984 5538 342332 252093 4096 16 7930 8948 275456 170716 4096 32 9772 17453 565968 175117 4096 64 29780 22349 471730 422662 4096 128 24378 30316 1424674 1248010 4096 256 25819 53576 811872 760648 4096 512 37721 48068 1067218 281628 8192 4 4838 5821 306485 113936 8192 8 6813 8131 303555 236605 8192 16 7507 14746 340948 546756 8192 32 15357 19884 501559 511231 8192 64 15615 16108 845761 466591 8192 128 23643 19092 799457 855298 8192 256 25538 26128 399569 391381 8192 512 20091 27214 440979 454428 16384 4 3868 5623 202054 200477 16384 8 8724 6637 367517 277699 16384 16 8755 14147 725150 434818 16384 32 15548 21646 833197 569894 16384 64 17841 19754 878824 761655 16384 128 39639 34155 685038 592977 16384 256 36885 51218 985567 768770 16384 512 31181 31201 846499 692131 32768 4 4023 4693 150041 191639 32768 8