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: Fri Oct 24 10:00:43 2025 Auto Mode Machine = Linux oleg201-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-oleg201-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 5550 12331 551422 603489 64 8 6707 25570 809014 673098 64 16 8324 48666 1002351 435202 64 32 2023 66250 1279447 1013707 64 64 4069 81745 735831 1232453 128 4 6349 21728 615814 568836 128 8 6114 21386 121332 576161 128 16 8267 39592 1346196 836500 128 32 10108 75299 852438 1123617 128 64 13424 103307 1306873 1561553 128 128 12080 105853 1526043 1967960 256 4 7227 13932 627623 479604 256 8 4799 36634 836374 782721 256 16 21579 50000 831194 1195962 256 32 19151 75717 1430119 941213 256 64 13609 89042 1368162 1340826 256 128 19216 57971 1514860 1629830 256 256 17865 123905 1652404 2266207 512 4 7243 13981 484890 568296 512 8 17025 31742 484015 745445 512 16 31092 60406 643189 934580 512 32 30418 69992 1205228 1147892 512 64 11452 49641 1523247 653961 512 128 23126 88171 821592 1520013 512 256 21466 72902 1433753 1368865 512 512 23950 113829 1729323 1933266 1024 4 13214 10694 430064 573365 1024 8 11212 10141 887425 763576 1024 16 24864 35634 1291406 991266 1024 32 28533 69142 725770 313528 1024 64 25227 55456 1363565 1126458 1024 128 20012 119948 1105865 1477555 1024 256 56863 113026 1416169 1499217 1024 512 51995 131619 1756054 1709912 2048 4 14933 15046 596738 442898 2048 8 14723 24649 816238 436396 2048 16 32181 43987 484846 836263 2048 32 17088 56909 830522 235722 2048 64 53432 97621 802512 1146118 2048 128 64516 116008 472342 1181103 2048 256 62720 72005 1594920 1563282 2048 512 52595 64933 517690 246060 4096 4 7252 7115 118542 237465 4096 8 26991 29715 880666 442759 4096 16 14556 18406 177731 661405 4096 32 48328 76220 1263057 1083301 4096 64 40709 45072 1201573 815765 4096 128 40625 39001 1536962 1292126 4096 256 31081 74829 1641053 1485145 4096 512 63351 81355 256688 1373092 8192 4 9936 13178 627016 524930 8192 8 17549 13463 332789 175481 8192 16 17801 20710 950140 326856 8192 32 29862 40112 667311 896774 8192 64 36918 38735 739876 801023 8192 128 39056 42000 1213104 926068 8192 256 25337 39161 578857 1252825 8192 512 38701 73883 913778 1308852 16384 4 9819 7635 353606 215763 16384 8 15641 19208 523517 737714 16384 16 25180 30004 742938 643646 16384 32 32685 50501 1036433 709847 16384 64 45315 67157 831171 699571 16384 128 53148 77991 1483395 654073 16384 256 47981 81398 1582566 727337 16384 512 47152 92695 888217 1104480 32768 4 8345 10944 551547 422392 32768 8 15805 16260 250172 211697 32768 16 24083 20580 698724 730530 32768 32 33152 50798 1212413 1046302 32768 64 43907 68780 916285 939767 32768 128 43313 57914 1308359 670117 32768 256 31854 52064 1240134 840935 32768 512 42635 49342 824059 976366 65536 4 8862 8191 194710 157758 65536 8