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: Tue Jun 2 21:34:32 2026 Auto Mode Machine = Linux oleg420-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-oleg420-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 3140 3934 620221 324665 64 8 2312 24445 420873 673098 64 16 2313 30131 1013707 1033216 64 32 3311 33231 1204796 926260 64 64 1142 37424 131148 1562436 128 4 1767 7005 375485 766076 128 8 3804 15861 730629 197248 128 16 5922 15620 942199 467329 128 32 5599 31233 1217930 37869 128 64 5005 19882 122606 1076312 128 128 8235 39949 1440082 1561553 256 4 2477 13788 127103 487664 256 8 5060 5602 498995 67510 256 16 5539 21919 246169 408918 256 32 10876 15708 624702 403843 256 64 8239 28237 1163562 1004618 256 128 9000 59300 1208072 673274 256 256 7907 35511 103226 775373 512 4 4118 7226 370204 485767 512 8 7503 8121 686358 167421 512 16 15963 29887 622133 677267 512 32 11478 11487 202367 208315 512 64 11490 39934 405353 592604 512 128 20318 33979 290090 321008 512 256 18883 45787 1316016 278864 512 512 25149 73280 1547395 670082 1024 4 4473 4132 605197 540124 1024 8 9265 7292 425589 219558 1024 16 9655 15364 828375 414900 1024 32 11111 21998 363616 473650 1024 64 20550 34742 449885 1067654 1024 128 14217 41884 1343938 1151834 1024 256 20327 30708 1264041 158171 1024 512 17902 35225 915223 558091 2048 4 9148 7956 231960 304706 2048 8 12357 17131 398442 712869 2048 16 10750 14448 424617 370003 2048 32 11089 16908 771726 418739 2048 64 15976 47862 1218291 293073 2048 128 21498 27422 970196 449715 2048 256 35891 53279 1391351 689799 2048 512 30733 33010 190422 1264935 4096 4 5672 6283 192020 373623 4096 8 11938 11960 494857 476176 4096 16 10480 15220 550322 407929 4096 32 13327 22605 454111 562098 4096 64 16077 45296 399143 264803 4096 128 17997 50493 625067 243783 4096 256 36127 60625 926697 341108 4096 512 28317 41839 527300 445700 8192 4 6133 2000 336139 313019 8192 8 9167 13910 452174 338526 8192 16 10804 17075 861949 386577 8192 32 22637 18294 464899 507335 8192 64 19881 32543 793018 648568 8192 128 30493 37384 776564 479484 8192 256 36319 51001 1328744 842629 8192 512 44947 76123 654149 674913 16384 4 8171 6920 214725 290862 16384 8 9167 9005 326576 348402 16384 16 17078 20739 396034 310327 16384 32 22172 22275 495930 679947 16384 64 25619 29050 463888 603640 16384 128 21873 44562 729051 666042 16384 256 28971 48072 923092 833743 16384 512 30987 47929 976173 770727 32768 4 5792 6199 276754 312785 32768 8 12237 14995 475312 444685 32768 16 15267 21764 361865 351090 32768 32 20086 20683 578642 322817 32768 64 19542 31505 384858 555511 32768 128 32148 42425 782633 573357 32768 256