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 Apr 23 21:37:20 2026 Auto Mode Machine = Linux oleg434-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-oleg434-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 1728 4978 195680 532815 64 8 2066 18141 801764 695778 64 16 3244 8385 955947 809014 64 32 2673 13579 1143223 1232453 64 64 3560 58497 1421755 1049372 128 4 1611 3505 542400 365764 128 8 4145 14494 323259 508012 128 16 5648 31449 852438 285144 128 32 7368 31121 1220700 927549 128 64 4199 66462 1172704 1455701 128 128 3240 10747 1436229 231030 256 4 2958 6188 559005 374281 256 8 5850 14996 67122 294918 256 16 2834 13299 269188 281319 256 32 6789 17268 847597 934659 256 64 7767 32462 545931 656399 256 128 8567 88462 257565 437582 256 256 7836 31291 1463250 937924 512 4 4140 8090 601063 203171 512 8 3600 4385 271462 606667 512 16 10126 11841 1046631 184701 512 32 10695 12408 1329871 106803 512 64 9805 22767 1216149 1084694 512 128 20663 65566 1312798 463338 512 256 8572 67349 1575781 878027 512 512 18792 52756 176242 1510391 1024 4 4548 5446 280408 335182 1024 8 5140 7051 515119 761950 1024 16 8091 11084 465487 1019987 1024 32 21920 27147 257881 981750 1024 64 16558 15643 1303161 671843 1024 128 13258 27553 1220575 1246071 1024 256 24028 47908 518728 263094 1024 512 30778 77428 1620249 928279 2048 4 5781 5917 134050 618746 2048 8 9194 7711 270968 409848 2048 16 14463 15101 429522 208702 2048 32 10396 11305 1202599 266422 2048 64 22203 42644 881307 651601 2048 128 14060 20591 509461 1159578 2048 256 43299 58272 500001 1325646 2048 512 25839 65264 828120 497684 4096 4 4044 9007 188496 139135 4096 8 9641 6361 209695 404548 4096 16 10152 12304 790104 693665 4096 32 15945 13384 209815 262782 4096 64 13959 16104 331793 469615 4096 128 25320 30162 225623 474571 4096 256 25309 57857 594586 560082 4096 512 32747 53241 548618 376192 8192 4 6384 3959 274485 157121 8192 8 5544 8491 322557 288949 8192 16 11721 13342 360562 527056 8192 32 15365 14137 379909 207423 8192 64 16545 34937 621358 349206 8192 128 19736 30508 334310 427244 8192 256 25537 36510 388632 274667 8192 512 30817 30779 958596 619431 16384 4 4380 3639 215310 141490 16384 8 6280 6938 354379 229345 16384 16 12500 11721 603465 355755 16384 32 20656 14878 756624 267891 16384 64 15349 23443 723547 237821 16384 128 32587 20597 173835 335861 16384 256 16614 38464 807848 223568 16384 512 45550 45034 567921 499880 32768 4