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: Sun Nov 16 20:18:52 2025 Auto Mode Machine = Linux oleg148-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-oleg148-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 3034 16108 250218 268756 64 8 2481 12091 376589 365812 64 16 3386 43213 586352 500060 64 32 4025 61415 863676 1049372 64 64 5403 24196 1204796 1310683 128 4 2575 15992 240124 241528 128 8 3708 3200 389091 368020 128 16 6626 43673 628061 684954 128 32 5243 17039 805138 563463 128 64 4514 84151 1175271 1048974 128 128 3121 79011 666253 1111981 256 4 5398 13541 249776 211749 256 8 4656 19929 375853 358056 256 16 12440 51914 593947 258620 256 32 8437 42622 836374 639967 256 64 9971 38918 1089202 800221 256 128 9670 53135 746272 965763 256 256 9706 66016 1354356 2061693 512 4 7309 7760 177466 238455 512 8 4814 11589 403525 415550 512 16 12029 41548 628138 528441 512 32 14768 70767 510964 718028 512 64 20718 81554 903136 883081 512 128 28368 52762 1227971 914287 512 256 21766 53445 313144 1309596 512 512 18782 105002 1326585 1492545 1024 4 5293 10676 135810 118945 1024 8 12931 22833 392635 388164 1024 16 18827 39553 641633 535812 1024 32 23310 52199 774034 815943 1024 64 27654 76975 1049138 926676 1024 128 16951 65903 1255175 243647 1024 256 15895 60221 1354535 1302766 1024 512 28743 96347 1497127 1361836 2048 4 7318 9022 122643 213643 2048 8 16258 12415 201259 299501 2048 16 27637 24898 604677 410004 2048 32 17916 37805 834881 754309 2048 64 36726 43953 1101724 674789 2048 128 33245 71882 1294677 1129540 2048 256 45586 65818 1324012 1140942 2048 512 28529 61312 1045410 544845 4096 4 9729 9840 229647 188070 4096 8 9352 15368 333332 411821 4096 16 17875 23143 375846 359360 4096 32 24327 28960 583380 257562 4096 64 39638 47874 1040901 856389 4096 128 28687 56772 1012319 801568 4096 256 40195 65211 690597 1039578 4096 512 39983 71514 1235979 474951 8192 4 8427 9061 225315 101557 8192 8 13635 17265 272720 300500 8192 16 17145 27687 595470 494898 8192 32 2401 37039 727208 724250 8192 64 32844 41986 876617 555651 8192 128 23633 52234 1213447 558496 8192 256 37585 83079 1106458 772028 8192 512 47149 68967 796271 720499 16384 4 9050 10438 159244 158305 16384 8 15875 16964 239696 247369 16384 16 16816 22752 167731 235477 16384 32 24907 28416 624439 670762 16384 64 22962 49609 645163 898930 16384 128 29740 29357 529455 824975 16384 256 32163 41146 1317555 1023543 16384 512 34051 43576 1251155 575319 32768 4 7408 8487 134629 204060 32768 8 14212 14512 283794 268590 32768 16 20907 25923 263650 463886 32768 32 31196 31306 313779 360211 32768 64 30268 31213 796402 612236 32768 128 32892 37791 1117864 876592 32768 256 32893 37522 761233 562820 32768 512 40417 46762 919030 1238815 65536 4