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: Wed Apr 15 11:20:56 2026 Auto Mode Machine = Linux oleg620-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-oleg620-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 3564 10652 293755 528618 64 8 5699 21227 277078 610350 64 16 2413 42241 488236 998622 64 32 2207 18180 1255511 1049372 64 64 3108 83760 1609270 1562436 128 4 7132 8574 382985 556454 128 8 6287 24219 824932 748976 128 16 7644 54839 492178 852438 128 32 5150 19109 1363288 1065630 128 64 8268 90461 1185654 1196221 128 128 12705 64482 1451764 1663139 256 4 8634 5364 593947 98582 256 8 3283 9999 378637 363142 256 16 6670 22632 855703 364127 256 32 9454 28809 1132871 516022 256 64 18405 16316 733527 506767 256 128 8439 88645 304020 1280084 256 256 14457 108702 621448 1868008 512 4 5469 6807 604447 523035 512 8 18062 20014 768658 554217 512 16 20476 22964 1022219 264214 512 32 13143 33483 279955 313739 512 64 26978 63864 1484293 953671 512 128 25674 68193 986529 1053304 512 256 21412 54572 1640796 1620980 512 512 27666 84767 868089 1289156 1024 4 10518 9468 411048 269618 1024 8 7578 10114 469302 69423 1024 16 14734 18798 735086 916004 1024 32 35749 65065 1145383 986485 1024 64 28307 32204 881234 835303 1024 128 38717 73791 1010864 920914 1024 256 34320 66527 754587 918354 1024 512 36935 67470 784640 972414 2048 4 5588 7534 396987 290821 2048 8 14164 14251 489376 774579 2048 16 14628 29312 1065642 932188 2048 32 27376 42411 608059 693082 2048 64 17039 19670 316530 469631 2048 128 43082 59020 659809 1272996 2048 256 31439 56885 1587551 714588 2048 512 26956 68586 703297 370338 4096 4 8824 11051 244071 338620 4096 8 14335 14023 203698 221307 4096 16 22241 36169 549196 715953 4096 32 31982 37312 1273261 479231 4096 64 26586 34869 1463884 1033574 4096 128 27270 28109 778574 321150 4096 256 29282 66336 805364 989349 4096 512 42266 35842 1227852 1044317 8192 4 5802 9614 232086 171180 8192 8 11857 15384 250995 644989 8192 16 12645 18463 338513 549282 8192 32 22321 23059 483355 425846 8192 64 28503 38977 400216 624667 8192 128 41494 48743 556299 493668 8192 256 33017 36240 1081453 299611 8192 512 30599 31354 351029 749087 16384 4 6341 7134 332946 264406 16384 8 14210 14033 570116 505707 16384 16 11633 17160 380191 494328 16384 32 26124 32878 319743 303621 16384 64 21557 31665 502145 477779 16384 128 23024 32395 491862 435791 16384 256 24414 103696 757750 970904 16384 512 29523 34638 403795 616241 32768 4 6364 6169 358100 390904 32768 8 8534 8530 340492 275347 32768 16 21059 16430 940500 473654 32768 32 22150 29077 469273 451922 32768 64 29534 36809 746100 414386 32768 128 23971 40347 410323 477675 32768 256