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: Mon Aug 24 15:28:21 2026 Auto Mode Machine = Linux oleg411-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-oleg411-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 1895 11596 561808 488236 64 8 1683 26822 799377 659861 64 16 3984 31919 889431 821391 64 32 4650 36652 374488 983980 64 64 3537 61485 942521 1385075 128 4 4754 6247 294853 581781 128 8 5197 17167 990891 165608 128 16 3282 46274 1217930 978253 128 32 4809 21936 871818 1111981 128 64 4117 75735 1220700 1319723 128 128 11481 70217 1471662 2066432 256 4 3815 4783 625794 107151 256 8 7440 20485 930608 744204 256 16 3961 17489 1123389 303333 256 32 8326 48402 1391207 1070737 256 64 6770 19672 1439707 1325925 256 128 11653 20715 1489641 1639786 256 256 6931 23925 263120 1868008 512 4 3486 9143 395717 583744 512 8 7616 6668 621233 684390 512 16 15643 28318 875164 1021732 512 32 8543 10294 745186 401638 512 64 20613 56857 1193838 450697 512 128 13897 23259 261098 1279935 512 256 21307 86516 1700565 1747618 512 512 17748 89026 53055 2022482 1024 4 8757 8639 168643 208677 1024 8 13485 19999 633213 698050 1024 16 18633 33641 857483 890553 1024 32 24209 41639 1408737 685351 1024 64 31593 63030 1386007 1301187 1024 128 12449 27388 1408737 1203137 1024 256 30064 88788 1670020 1582636 1024 512 37596 86734 1340164 1034232 2048 4 9388 10401 292614 354139 2048 8 11469 5986 691464 265245 2048 16 16514 14191 1073365 972833 2048 32 15086 23648 757369 691186 2048 64 15890 39253 1192085 1081337 2048 128 18657 43005 235161 539507 2048 256 21413 36801 1282308 333708 2048 512 33392 59229 1024586 812993 4096 4 3698 5862 254140 278221 4096 8 7976 8666 397518 270162 4096 16 12503 8303 635049 510215 4096 32 15130 14409 315366 309063 4096 64 13788 17614 602700 372093 4096 128 22927 40640 639398 864143 4096 256 37640 56274 939005 435277 4096 512 25284 43178 1780702 758097 8192 4 5297 2168 273750 382787 8192 8 11270 9894 585935 270899 8192 16 16415 13861 346382 220458 8192 32 18665 24890 788975 456991 8192 64 34096 37021 510441 493732 8192 128 33965 57435 431883 639098 8192 256 30353 61998 617472 403781 8192 512 30286 31960 1029634 720483 16384 4 3795 4612 339860 217886 16384 8 10053 12640 340936 226802 16384 16 12859 15680 690871 589736 16384 32 16902 19511 271365 375436 16384 64 17651 27116 481472 719321 16384 128 18725 26933 361223 317957 16384 256 25344 30907 559943 484934 16384 512 23260 39143 467073 1105013 32768 4 5523 7581 187497 258379 32768 8 11366 13285 316712 280586 32768 16 12114 11777 239556 343199 32768 32