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 13 09:49:02 2026 Auto Mode Machine = Linux oleg155-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-oleg155-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 3331 5096 463774 219165 64 8 4638 2659 653436 561808 64 16 4115 44755 926260 633392 64 32 2755 63253 1392258 1101022 64 64 5766 52115 743988 1143223 128 4 7638 7830 542400 341129 128 8 11111 12286 883293 159982 128 16 12151 38130 1093856 466923 128 32 19227 37102 1209698 971174 128 64 11682 53914 1363288 1294270 128 128 12845 64911 159412 1939522 256 4 7417 9603 605332 558715 256 8 10231 15819 678807 62730 256 16 16762 22487 1084800 859127 256 32 10874 18491 1311351 548161 256 64 20138 57321 1212164 651223 256 128 6842 48742 1523457 873809 256 256 22072 103644 1208072 1970871 512 4 9415 10296 263371 502475 512 8 8205 11322 926116 398730 512 16 14044 28442 1165966 939486 512 32 17258 59102 859060 487200 512 64 19150 29255 123462 1176828 512 128 25542 92052 1537424 700463 512 256 43229 105373 919375 1677976 512 512 34029 103704 1158418 2826358 1024 4 7110 8202 633213 153964 1024 8 12908 18287 367537 765890 1024 16 7693 15565 1172909 563584 1024 32 17673 39242 431143 895194 1024 64 28766 48372 937805 1217461 1024 128 26484 59897 901394 931904 1024 256 42925 51174 1421795 1495042 1024 512 41293 122868 1712639 320213 2048 4 7482 7065 340198 211638 2048 8 11614 17206 922874 397593 2048 16 15110 25827 481422 675054 2048 32 25414 38742 1252760 753185 2048 64 35014 57524 1432179 1308482 2048 128 28062 39278 363183 812993 2048 256 32218 35561 635077 1655793 2048 512 64443 40459 1543340 1747411 4096 4 6046 5322 341821 369635 4096 8 13832 11181 368573 405752 4096 16 8106 17376 448679 313794 4096 32 16823 18051 412910 600845 4096 64 21228 32811 1162624 978474 4096 128 31240 39525 907029 548477 4096 256 38934 46193 789668 776217 4096 512 32721 45481 431516 484051 8192 4 4301 5583 201258 182669 8192 8 8206 11470 459325 283892 8192 16 15015 20538 622066 632929 8192 32 18556 34294 771161 646153 8192 64 13192 30145 389721 467900 8192 128 30717 32721 801565 554674 8192 256 26917 43337 609606 749839 8192 512 28577 48691 828228 652435 16384 4 3848 7490 350842 211750 16384 8 11896 12459 322793 368329 16384 16 18637 23011 1014552 534707 16384 32 21878 23662 921632 393107 16384 64 22786 42339 1044229 1090961 16384 128 35736 45748 904396 1164050 16384 256 43154 49955 716867 906699 16384 512 39915 60209 1037419 890681 32768 4 5511 5858 569849 413038 32768 8 13057 11081 577511 558674 32768 16 13674 18594 1005951 808784 32768 32