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 23:39:34 2026 Auto Mode Machine = Linux oleg620-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-oleg620-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 3373 10075 666414 587635 64 8 10080 21985 769584 66398 64 16 5697 22535 703068 528618 64 32 6299 41535 1304314 1648808 64 64 7992 16922 1143223 471099 128 4 4224 7675 260136 529038 128 8 5424 25356 636249 821147 128 16 4957 49268 1196221 1024942 128 32 4856 10818 182807 1162547 128 64 13446 61952 1487977 908709 128 128 9096 50040 1579934 2066432 256 4 5995 5157 220670 518263 256 8 12418 17435 523570 566377 256 16 14778 35025 248275 753077 256 32 17574 35848 1066483 901693 256 64 7518 50975 1137672 859127 256 128 20621 85674 917880 1600674 256 256 10947 96936 1453348 1016025 512 4 8725 12050 627404 136133 512 8 11181 12242 318579 78856 512 16 12733 15729 554074 661618 512 32 9243 22120 566348 414908 512 64 25468 63115 598717 311057 512 128 32926 68724 42663 895230 512 256 9979 29983 1344020 1515722 512 512 29821 86310 640885 433152 1024 4 3960 1786 287484 326221 1024 8 6092 13577 374132 223826 1024 16 7629 18615 317210 470794 1024 32 15252 10188 88858 133161 1024 64 20147 16875 1232130 671423 1024 128 23959 25607 334869 1131503 1024 256 21005 28918 1378445 1016847 1024 512 40375 109767 1648862 790852 2048 4 3955 4503 309549 433817 2048 8 13736 6171 267292 190634 2048 16 7721 20585 641815 924165 2048 32 9380 11206 296892 978931 2048 64 20479 27185 591927 594672 2048 128 37099 42989 254601 509824 2048 256 31428 60404 198566 303501 2048 512 14007 55703 531397 1391351 4096 4 3332 1188 434308 344349 4096 8 11242 14327 390497 163031 4096 16 11044 13947 685090 333636 4096 32 24818 26995 784082 491656 4096 64 27995 39686 783795 1024269 4096 128 28569 48992 636131 309342 4096 256 28463 38577 655675 730380 4096 512 22926 35872 253716 329635 8192 4 5904 11266 166619 145684 8192 8 8189 8650 250419 417956 8192 16 20659 20716 889162 545836 8192 32 29115 52099 1053630 413948 8192 64 19167 50359 689971 675232 8192 128 33261 26936 234943 363088 8192 256 40233 44130 382677 338553 8192 512 36254 50367 499082 701365 16384 4 5000 5728 272762 164379 16384 8 6290 9106 383387 373996 16384 16 14373 12122 718215 562560 16384 32 20513 20829 663476 428407 16384 64 21325 39855 816099 695000 16384 128 19581 34649 1013175 861774 16384 256 37093 43056 523717 525768 16384 512 27673 50986 1141674 867431 32768 4 4511 5324 332551 313203 32768 8