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: Thu Aug 27 18:23:46 2026 Auto Mode Machine = Linux oleg322-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-oleg322-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 2630 6024 639427 491815 64 8 1870 28394 598110 688639 64 16 3587 13864 811459 500060 64 32 3786 24162 1087638 886494 64 64 2256 24142 1163036 1304314 128 4 3018 8309 592699 323259 128 8 3360 11478 753179 374176 128 16 4508 11383 260641 551312 128 32 7465 62348 1451764 1172704 128 64 5903 41666 1377278 1266785 128 128 7965 18465 1451764 1772988 256 4 6977 10241 377041 271160 256 8 7629 7587 773140 686182 256 16 8327 26728 844929 901693 256 32 7702 21251 941213 973645 256 64 9374 21248 1334162 552960 256 128 8324 87969 891956 1224606 256 256 14645 51854 1662639 2114473 512 4 5780 4794 374269 525724 512 8 5003 11102 646480 754083 512 16 6346 12383 549396 180782 512 32 12294 27836 605982 488975 512 64 18486 26101 1282994 726039 512 128 14158 58521 1270094 935801 512 256 17890 34224 97894 1289156 512 512 11547 68374 1616100 1034530 1024 4 4563 3259 313231 508472 1024 8 9936 10339 555349 239303 1024 16 14634 20452 251361 902151 1024 32 26532 28988 509981 641154 1024 64 11959 23311 723569 411087 1024 128 18056 58507 680789 931702 1024 256 30574 75857 1458489 718605 1024 512 19449 40820 1204825 529732 2048 4 6307 6117 197761 185709 2048 8 10553 14179 266802 443287 2048 16 10444 25202 408523 1015862 2048 32 15120 36377 417964 363183 2048 64 22240 26262 792005 1259557 2048 128 16734 37793 935538 345535 2048 256 39998 66368 1670606 818805 2048 512 32397 31664 1035455 376127 4096 4 8914 6050 247567 168344 4096 8 10941 14031 376579 482908 4096 16 15539 19762 598043 940496 4096 32 20075 34492 768921 409973 4096 64 24891 54931 1125529 869083 4096 128 31270 59738 939005 1285263 4096 256 27480 48027 1008871 538810 4096 512 29530 69281 713959 998550 8192 4 6400 7472 250229 214075 8192 8 9627 2527 253992 293809 8192 16 19486 17481 645801 354202 8192 32 22216 31561 469800 457088 8192 64 34347 30276 680110 748336 8192 128 28114 66355 1304231 729664 8192 256 26772 46297 1135265 1333333 8192 512 31362 39920 294708 453445 16384 4 6274 8238 231004 221741 16384 8 10219 14151 451873 253249 16384 16 14897 23752 537409 971014 16384 32 17067 24513 645545 678511 16384 64 28706 36662 635186 722049 16384 128 25785 41653 490657 706846 16384 256 31664 43277 771991 453714 16384 512 29410 45260 1253369 898002 32768 4 6613 7476 363600 328824 32768 8 10006 12263 491134 286303 32768 16 16536 21201 669745 389834 32768 32 19139 23878 601565 849527 32768 64 24923 33407 504930 423599 32768 128 34144 36987 880128 572657 32768 256 38380 50471 1110287 830518 32768 512 34543 49084 1063688 606521 65536 4