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 01:11:14 2026 Auto Mode Machine = Linux oleg447-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-oleg447-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 2105 8300 463774 201255 64 8 2388 11527 703068 503814 64 16 3182 26153 983980 673098 64 32 4814 22832 1163036 1049372 64 64 3087 31492 1452528 1363961 128 4 3065 7269 584313 290859 128 8 5968 19984 494444 710329 128 16 5697 20199 1007629 395104 128 32 3608 32561 561107 217638 128 64 4724 29037 253983 1093856 128 128 7021 56915 1377278 488594 256 4 6302 5184 560172 226155 256 8 3510 12264 543445 243379 256 16 4896 28574 833776 463657 256 32 5068 19468 537729 675391 256 64 12773 16628 740100 54864 256 128 4504 27450 225965 870974 256 256 7128 63195 1532153 1497953 512 4 6978 7250 232190 302940 512 8 8566 8442 568899 498047 512 16 10825 8902 626672 373163 512 32 12669 14543 803757 984720 512 64 15217 39417 1283761 321440 512 128 19083 46469 1105920 917412 512 256 14007 35162 213429 362885 512 512 7578 27575 376170 1339827 1024 4 3640 6195 223384 497344 1024 8 14282 17720 471052 660276 1024 16 15369 23180 495622 760735 1024 32 10310 27078 331944 944819 1024 64 23819 30870 479627 492101 1024 128 16636 36767 192411 173795 1024 256 26409 49134 1457004 1501838 1024 512 14199 23397 131772 335078 2048 4 8005 12018 408542 304663 2048 8 6761 9624 517846 354387 2048 16 11658 14095 446490 393477 2048 32 8922 22461 345938 612437 2048 64 23974 21255 1424106 462003 2048 128 21014 30277 718113 527708 2048 256 41115 59390 850841 677022 2048 512 47636 84269 909006 549200 4096 4 9251 9033 361736 226388 4096 8 10762 9379 320073 303720 4096 16 15324 12786 454508 485241 4096 32 28360 51603 773387 491431 4096 64 18773 56884 900232 674122 4096 128 25430 47420 524387 186470 4096 256 34928 51836 495042 602193 4096 512 45519 28935 789377 291239 8192 4 9869 16148 366794 269606 8192 8 8859 12368 739606 378662 8192 16 2580 16988 602033 508221 8192 32 35475 23252 580255 324590 8192 64 27922 32540 730579 477690 8192 128 25936 43309 438805 330761 8192 256 22912 23476 687582 394455 8192 512 17144 24195 494806 261499 16384 4 5765 5086 158320 112884 16384 8 6719 4026 455123 200661 16384 16 27225 22821 676553 602396 16384 32 31330 36536 1003426 891652 16384 64 22405 52570 513894 688835 16384 128 47806 27605 737485 755999 16384 256 51340 96159 1138082 989555 16384 512 50431 27981 791035 725341 32768 4 10220 12287 338494 361501 32768 8 17510 8048 285073 386742 32768 16 10093 11090 432707 268165 32768 32 16725 19358 379501 535766 32768 64 21437 27832 758640 505093 32768 128