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: Mon Aug 10 01:17:34 2026 Auto Mode Machine = Linux oleg456-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-oleg456-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 3182 12473 688639 546928 64 8 3604 22637 829001 743988 64 16 5774 34446 1033216 942521 64 32 2586 64314 1336792 1392258 64 64 3293 55601 1210227 1526887 128 4 6026 8591 650117 46111 128 8 9539 14562 115535 69607 128 16 7570 40880 1373754 942199 128 32 12427 39875 1377278 859260 128 64 9183 76599 940549 1406136 128 128 7674 90142 864797 1684006 256 4 9330 12132 162030 109211 256 8 10377 12497 561343 577651 256 16 4989 41323 1213534 383232 256 32 10589 47933 447615 723153 256 64 23255 38827 1445521 1334162 256 128 10660 29757 1763685 1384034 256 256 7292 64648 1267990 625794 512 4 7761 11840 114411 99146 512 8 9798 21315 325090 375119 512 16 13039 37872 307318 605299 512 32 23757 44313 257931 1055375 512 64 11470 70253 643960 190113 512 128 16766 40747 575300 329935 512 256 19421 109237 909255 851903 512 512 26834 99730 1674052 737762 1024 4 7301 4507 169227 145125 1024 8 13799 14879 329146 615341 1024 16 21197 17349 723203 185105 1024 32 25782 53419 412390 259032 1024 64 31350 66541 859026 645684 1024 128 28149 47232 640007 391740 1024 256 20775 54168 907105 532490 1024 512 22059 69931 742071 401068 2048 4 7995 6735 416768 357232 2048 8 12345 15442 340710 465861 2048 16 20364 16445 1251118 358424 2048 32 12738 21292 325637 368353 2048 64 25676 31998 708167 703297 2048 128 27802 48379 1029621 470583 2048 256 21757 39959 510612 513942 2048 512 21850 71125 1360715 1095123 4096 4 9854 10345 317078 387110 4096 8 13263 13475 388800 205912 4096 16 17336 15534 591576 576974 4096 32 25254 31095 625045 954288 4096 64 26634 31764 1009641 738957 4096 128 30159 39826 605014 744852 4096 256 39476 21374 1505315 1257602 4096 512 29823 41789 1023475 685636 8192 4 7235 5192 301108 250634 8192 8 9743 13155 455091 381110 8192 16 10886 21402 733730 487297 8192 32 21143 23088 678659 330443 8192 64 23366 30123 884174 815703 8192 128 31191 47256 879715 546165 8192 256 32757 47523 754184 745738 8192 512 25233 43268 460587 424101 16384 4 5331 5447 298113 262073 16384 8 10610 12545 659370 581615 16384 16 16726 18964 909615 610504 16384 32 21767 31277 864452 252326 16384 64 25326 32286 679551 527018 16384 128 33880 32710 1013116 553177 16384 256 23226 38458 445614 428159 16384 512 33574 43805 1276416 731955 32768 4 7756 7263 331314 350996 32768 8 10079 12504 528142 574143 32768 16 16391 20482 623713 630578 32768 32 22249 27373 718609 749771 32768 64