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 Sep 10 10:37:15 2026 Auto Mode Machine = Linux oleg608-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-oleg608-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 2278 2125 645579 603489 64 8 1350 5594 183381 877797 64 16 2069 40379 913649 512471 64 32 2579 10797 1124074 942521 64 64 3384 57557 1421755 1484662 128 4 2377 10449 444501 544601 128 8 2365 4172 790905 766076 128 16 4342 27198 940549 848397 128 32 2216 19968 1162547 1015251 128 64 3473 72113 1243315 1162547 128 128 2851 53198 1217930 1727352 256 4 4607 8474 124020 133603 256 8 6061 4477 658411 353110 256 16 7162 23954 999940 913973 256 32 5364 37161 1256123 850282 256 64 5741 11332 1089202 560172 256 128 10091 34160 1543163 635423 256 256 7341 30754 452329 1729594 512 4 2748 3283 201097 533827 512 8 8066 12231 457124 500484 512 16 4893 12120 901241 1071167 512 32 13512 33407 658978 440165 512 64 7988 55434 946109 1418599 512 128 12442 36386 1619757 962218 512 256 21842 69604 1021732 1500891 512 512 12295 40349 1087440 383561 1024 4 6678 11290 604856 438181 1024 8 11612 7983 867003 377420 1024 16 14620 13223 360927 727861 1024 32 18884 17184 507451 1102459 1024 64 18289 79851 1064479 1120288 1024 128 27614 42775 618354 1190465 1024 256 23669 32628 441378 575285 1024 512 19743 50595 209451 1428415 2048 4 2701 10284 413637 262065 2048 8 15143 7034 253691 177684 2048 16 10212 12299 728281 623054 2048 32 20581 41206 1285763 1199074 2048 64 34611 28362 539101 534871 2048 128 15228 47167 880494 1422220 2048 256 19166 43285 795304 352612 2048 512 36847 41053 541207 509582 4096 4 5017 4925 336287 201762 4096 8 8488 9291 490477 435376 4096 16 28661 13455 316459 204289 4096 32 16947 42814 879539 365188 4096 64 27275 48338 627854 605376 4096 128 31306 64685 765325 604142 4096 256 26194 23918 1005387 592147 4096 512 24914 34242 918424 384820 8192 4 2215 5767 347075 488405 8192 8 9346 11702 538623 468673 8192 16 13358 25330 742290 506744 8192 32 19078 19742 301732 316414 8192 64 19950 37868 380490 428426 8192 128 41955 43447 864878 669548 8192 256 30725 48798 905900 677642 8192 512 38355 48022 876438 691192 16384 4 7786 8684 241274 170816 16384 8 10973 10454 324841 326244 16384 16 15232 18867 366221 427948 16384 32 18141 23292 512606 363716 16384 64 23456 34608 1032710 450791 16384 128 28462 34686 844885 865094 16384 256 26237 33666 749012 637484 16384 512 32582 36221 822772 422333 32768 4 5696 7047 217847 236375 32768 8 9227 13768 390286 402328 32768 16 16330 19518 464294 817258 32768 32 20648 26517 1123383 532994 32768 64 30058 47947 988123 949329 32768 128