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: Tue Jun 9 03:39:26 2026 Auto Mode Machine = Linux oleg418-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-oleg418-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 4029 10017 598110 410573 64 8 5545 20131 727850 381405 64 16 1625 12309 381405 998622 64 32 1560 34442 1304314 1066042 64 64 3280 56242 1255511 1638743 128 4 3965 5495 666253 241528 128 8 3577 6242 636249 386848 128 16 6050 20912 985435 914904 128 32 5103 32644 181020 1121270 128 64 10829 16629 1102844 1391557 128 128 8509 113484 1332828 1243315 256 4 2312 5196 228757 587127 256 8 3210 7409 324020 444465 256 16 6928 17165 1235882 1019886 256 32 6329 50763 1089202 762164 256 64 10548 32121 1292410 1053922 256 128 11191 89636 1052888 1243036 256 256 20954 78142 1540948 2131261 512 4 7136 6945 197691 293942 512 8 8924 14912 907717 207610 512 16 14704 18152 635198 929322 512 32 22911 54783 1195832 896725 512 64 8940 32770 1100818 270743 512 128 13031 28876 450318 1003588 512 256 23754 21944 1734911 836310 512 512 20110 27621 917804 1199171 1024 4 6999 3381 684478 291821 1024 8 10529 7270 956178 539243 1024 16 9668 14057 894262 249333 1024 32 16597 12995 748016 976172 1024 64 26601 68003 798795 839384 1024 128 32352 72419 503642 1127641 1024 256 20262 46625 1370965 992412 1024 512 32211 32920 205012 352369 2048 4 4423 5588 324150 156862 2048 8 7972 6926 212381 445124 2048 16 13142 21846 951602 157501 2048 32 14339 16490 329674 204513 2048 64 13603 32964 1051424 721612 2048 128 42706 43501 1521741 599152 2048 256 26670 24724 1557330 1174321 2048 512 15458 41351 523240 349016 4096 4 6095 5437 118511 152783 4096 8 19222 8706 228328 459922 4096 16 12291 15732 267975 345568 4096 32 16878 20400 169081 241824 4096 64 21935 27816 1061415 343880 4096 128 24461 31606 989862 762471 4096 256 21724 30973 1559706 366403 4096 512 28497 40248 1223131 349484 8192 4 4352 4454 185927 136199 8192 8 7732 8832 359916 286472 8192 16 14036 13325 411164 513277 8192 32 18019 26416 386634 224969 8192 64 21360 31082 325531 235516 8192 128 25725 50459 448456 503935 8192 256 26156 42624 758111 564813 8192 512 31279 43072 431525 365895 16384 4 5146 5988 284138 247081 16384 8 9492 11124 399202 566334 16384 16 17048 17442 562754 512817 16384 32 21102 25380 760526 434010 16384 64 23077 28069 590394 434370 16384 128 22964 31388 637804 624888 16384 256 25734 37121 501039 391935 16384 512 38949 45112 508977 1025467 32768 4