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 26 19:54:42 2026 Auto Mode Machine = Linux oleg233-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-oleg233-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 2892 18873 460591 438043 64 8 7408 30798 727850 866463 64 16 4147 40734 780776 752329 64 32 5212 17490 1049372 1119387 64 64 2474 87415 1204796 1722886 128 4 9195 10062 628061 667081 128 8 9040 15954 794416 805138 128 16 8497 51199 955616 809997 128 32 4005 46819 2175277 633247 128 64 18475 61477 1406136 1579934 128 128 19402 116261 1827299 3277486 256 4 10919 15953 307679 336827 256 8 15289 35446 385018 759469 256 16 12332 39868 941213 1023775 256 32 17186 64762 1128110 1178892 256 64 11630 62759 1163562 1163562 256 128 18432 97561 947860 1598292 256 256 32615 125984 1610276 2187712 512 4 4251 7704 598884 787834 512 8 7603 15571 301536 285235 512 16 11718 13963 592604 495176 512 32 21293 16685 46706 705989 512 64 13882 46297 548834 417976 512 128 17529 74516 1009722 1399189 512 256 9939 109193 1556366 2460437 512 512 10534 146999 1842059 2625909 1024 4 7636 7564 259705 286105 1024 8 15205 19017 150564 718125 1024 16 17583 29767 189977 956178 1024 32 8948 58464 1236742 1057663 1024 64 19138 28988 1104727 399093 1024 128 15999 99941 744257 669226 1024 256 54587 104766 2008114 734081 1024 512 47024 21019 1547286 207960 2048 4 7546 7918 187373 600576 2048 8 15778 18112 592253 283068 2048 16 19079 28582 658545 336348 2048 32 26751 31012 1263447 1064453 2048 64 34735 49582 1279062 1165557 2048 128 57520 49119 891552 1283841 2048 256 50315 53415 1540020 415317 2048 512 28394 53943 1799766 1362442 4096 4 10411 9181 410748 115705 4096 8 10226 9877 332654 298045 4096 16 12258 14164 612062 211987 4096 32 22803 24245 950802 1066356 4096 64 40131 49986 291674 356112 4096 128 20124 29707 1479772 532217 4096 256 27048 40989 916758 1339476 4096 512 36475 59357 756129 783474 8192 4 8583 6499 380899 325466 8192 8 10163 17274 431385 440928 8192 16 21869 18633 593834 755012 8192 32 19817 31829 534766 556029 8192 64 36126 45979 1025394 573103 8192 128 28003 52539 1039446 785728 8192 256 30314 48001 999881 998777 8192 512 61902 65864 569399 630063 16384 4 6040 9309 404382 338833 16384 8 11524 11762 524220 390104 16384 16 19317 22126 794262 675124 16384 32 26273 39265 884138 754083 16384 64 37642 34796 750492 691984 16384 128 28102 35202 1171052 607283 16384 256 27173 48317 883036 649775 16384 512 47600 54128 1221032 788638 32768 4 7503 8112 376150 305697 32768 8 9944 14247 334408 414596 32768 16 20046 21284 901654 562224 32768 32 27511 44095 858720 705934 32768 64 33463 35209 718692 565413 32768 128 33176 46661 919054 1575686 32768 256 63178 56666 1104603 562520 32768 512