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 Sep 17 05:04:34 2026 Auto Mode Machine = Linux oleg318-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-oleg318-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 2398 2865 546928 55269 64 8 2093 12300 754443 470274 64 16 3035 31588 1070292 735831 64 32 1964 41529 647135 901377 64 64 5444 12693 831569 1421755 128 4 7678 10199 385460 397444 128 8 4227 9913 549618 494444 128 16 5580 14885 1172704 719853 128 32 7862 35935 836500 757430 128 64 7555 31181 753179 595328 128 128 7556 39592 1076312 1349580 256 4 4637 9119 537729 592636 256 8 11212 15849 155057 498995 256 16 10819 22256 197822 753077 256 32 17473 29605 1093639 1032636 256 64 9601 74349 1243036 1213534 256 128 11551 86280 820398 1325925 256 256 20283 89227 1430119 1924938 512 4 8722 5754 240350 513530 512 8 8820 10219 461645 771143 512 16 26395 35744 775879 483470 512 32 24562 24807 980673 793657 512 64 16583 77776 362089 861818 512 128 16493 65014 1150351 729492 512 256 32797 131547 477133 1450212 512 512 17808 76496 910797 2073249 1024 4 6037 10103 419479 515862 1024 8 12175 11336 674587 787661 1024 16 11851 25152 547003 385378 1024 32 20573 41664 826462 643170 1024 64 17163 55041 1393200 520362 1024 128 37421 35051 319309 1333093 1024 256 21341 62041 1419915 517166 1024 512 20492 66631 169201 1040496 2048 4 7384 11834 353658 605743 2048 8 9480 17806 409926 473410 2048 16 16880 30426 785271 234353 2048 32 37700 52915 1331606 558012 2048 64 42526 83673 490774 1383731 2048 128 30905 51476 269396 406032 2048 256 42138 62490 558484 357737 2048 512 27710 59149 1815744 1010365 4096 4 6908 6748 386048 271224 4096 8 10257 13485 631338 405503 4096 16 15210 15485 234205 493379 4096 32 21205 30602 708395 369707 4096 64 25843 31468 546575 624772 4096 128 36888 35923 530852 569288 4096 256 21138 44255 1045970 451699 4096 512 36675 54103 821499 771407 8192 4 5956 6274 288713 186271 8192 8 12195 13291 378591 475864 8192 16 30318 20383 533124 335175 8192 32 25738 28834 901290 470889 8192 64 29160 35631 473660 466325 8192 128 33036 47302 326152 428223 8192 256 46425 54249 398735 404861 8192 512 44919 56481 936671 804229 16384 4 7262 6577 195284 236482 16384 8 10783 15174 280976 337905 16384 16 17056 25552 610092 605197 16384 32 22196 30020 343048 378584 16384 64 25205 48629 746295 828776 16384 128 36575 63135 520772 510531 16384 256 37416 75701 828107 567667 16384 512 46558 72208 908245 499985 32768 4 8232 8153 251811 207055 32768 8 12003 13402 614508 408394 32768 16 15548 21020 670392 403625 32768 32 23117 34528 639587 601868 32768 64 27246 44537 586747 600167 32768 128 26598 50215 1102335 978534 32768 256