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: Sun Jul 26 11:11:31 2026 Auto Mode Machine = Linux oleg129-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-oleg129-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 3394 6447 681644 576282 64 8 4379 24530 889431 889431 64 16 3500 26978 1101022 901377 64 32 1984 42664 1330167 1083249 64 64 5880 53785 1105556 14561 128 4 3884 10284 526961 109213 128 8 4483 14663 800337 542400 128 16 7987 40125 1032829 1015251 128 32 5355 31612 1121270 942199 128 64 7740 39216 1209698 1217930 128 128 3536 15030 1487977 1406136 256 4 6890 10936 297698 415566 256 8 6544 9909 809878 340459 256 16 5611 31495 1422540 295649 256 32 13013 39535 175827 176695 256 64 21264 47285 718796 659625 256 128 17103 47841 1407621 1437779 256 256 6800 57154 1842366 2533571 512 4 3705 8738 311825 474497 512 8 10673 16593 690108 761841 512 16 12057 19286 273049 932956 512 32 10345 15223 156810 689886 512 64 15023 38600 664073 722133 512 128 19186 40976 1350783 1309596 512 256 11394 40940 832420 1066910 512 512 15246 52117 364920 1741948 1024 4 8766 5274 135951 298182 1024 8 7678 13644 491819 733078 1024 16 7287 12120 941093 259439 1024 32 20364 30153 1068983 217402 1024 64 11966 47202 1584972 1094034 1024 128 27710 56879 552350 914249 1024 256 22592 78908 1670020 1067654 1024 512 31572 62200 617287 374295 2048 4 7390 6258 372361 279394 2048 8 6229 11556 366233 432071 2048 16 10265 12550 256448 202631 2048 32 24532 32167 495159 636253 2048 64 27870 26664 606299 476826 2048 128 46023 52104 926357 690464 2048 256 51063 78896 1170321 406589 2048 512 29399 34949 814690 344316 4096 4 6602 3371 170432 200047 4096 8 9617 7895 382550 420974 4096 16 16996 18778 500435 772378 4096 32 30798 16134 447068 507937 4096 64 27174 22182 439340 607710 4096 128 41919 60500 838827 1219744 4096 256 34691 38974 1503734 579680 4096 512 49536 63690 516644 728429 8192 4 5601 6489 304843 325892 8192 8 2279 7758 361134 377875 8192 16 10992 15982 294761 304397 8192 32 22012 25532 446092 386234 8192 64 24582 32092 421986 379662 8192 128 35735 42386 1129778 654199 8192 256 38275 43465 1009131 891793 8192 512 46943 50662 710987 588081 16384 4 5215 7750 142700 196271 16384 8 7692 12225 416323 361645 16384 16 18545 14572 625297 422169 16384 32 16268 20344 674237 464742 16384 64 20280 34971 709473 725119 16384 128 26510 38288 595758 539357 16384 256 28447 44733 825798 505618 16384 512 38165 53734 729314 694712 32768 4 6225 7301 287128 285038 32768 8 13085 13231 442973 474898 32768 16 11316 16614 472993 614656 32768 32 19845 32764 433731 356197 32768 64 24189 39514 1086613 887614 32768 128