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 Aug 6 05:09:21 2026 Auto Mode Machine = Linux oleg334-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-oleg334-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 1926 6243 81324 571375 64 8 3267 28457 866463 666414 64 16 2757 46955 511494 969761 64 32 4494 65427 432398 1017549 64 64 9786 78060 1357066 1828508 128 4 2969 5196 653282 372102 128 8 3848 6379 816154 672934 128 16 2901 16039 1040839 853794 128 32 4860 73485 1024942 292285 128 64 8619 57090 438331 1243315 128 128 15225 35300 1684006 312897 256 4 3850 4819 699594 291239 256 8 6297 8231 766517 744204 256 16 12069 16521 1004618 1093639 256 32 8225 13597 1579483 299025 256 64 13509 12881 795478 1230218 256 128 4396 41217 1570244 1600674 256 256 14135 59686 1802167 2081678 512 4 3548 4024 153437 258055 512 8 5563 6962 786391 511085 512 16 7300 25159 879465 751707 512 32 10744 19539 1347393 1216149 512 64 11443 36718 1429934 1471074 512 128 14067 30845 1053304 1541840 512 256 14713 58163 1267097 1044594 512 512 18043 163061 944860 2189509 1024 4 3681 3046 191041 306503 1024 8 7470 7617 359929 332047 1024 16 8325 9831 202728 418620 1024 32 7527 9847 722109 1131503 1024 64 22078 40597 1142945 1034232 1024 128 34733 91136 1066594 1021928 1024 256 40131 87268 1635675 1068983 1024 512 55371 126108 1296474 1419915 2048 4 8413 10414 495159 296043 2048 8 11191 14989 619683 243929 2048 16 16224 27424 571108 401421 2048 32 16971 37061 698493 737472 2048 64 26937 39442 348832 660215 2048 128 28640 42219 1058420 1061690 2048 256 1353 64520 1179805 791348 2048 512 35723 51956 1264935 927958 4096 4 5867 5556 398209 247524 4096 8 11267 13347 374543 345013 4096 16 20147 27858 403266 440952 4096 32 17507 16412 863405 646666 4096 64 14298 28908 1620160 1350957 4096 128 16749 33121 1757925 501839 4096 256 25976 41548 686897 351737 4096 512 24272 21816 1926684 383198 8192 4 4107 4620 210894 299865 8192 8 7118 7092 283714 176323 8192 16 7721 12418 303880 264692 8192 32 11641 13662 409352 460124 8192 64 21151 27164 424237 607762 8192 128 26713 44434 608214 517826 8192 256 26287 53823 1261472 775845 8192 512 42172 55727 928797 880684 16384 4 6363 5180 201413 193227 16384 8 7213 7821 164271 132759 16384 16 8261 9585 1019337 489236 16384 32 17849 11114 415196 278739 16384 64 18624 42830 1232066 965407 16384 128 48358 18148 606388 324672 16384 256 27647 35083 347781 327242 16384 512 23459 42502 297274 804717 32768 4