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 Mar 30 12:33:40 2026 Auto Mode Machine = Linux oleg234-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-oleg234-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 2089 8574 124981 131986 64 8 5036 16401 234276 211899 64 16 6690 31760 405610 413101 64 32 4836 47445 524487 571375 64 64 9431 58986 913649 939223 128 4 4018 11412 60981 180533 128 8 3309 3658 189921 41409 128 16 8749 19826 113292 327399 128 32 9675 35865 659704 82904 128 64 15189 53336 681476 789741 128 128 14394 122606 612303 503723 256 4 3897 10296 144072 45672 256 8 8073 14826 227545 111641 256 16 6140 24235 434747 371048 256 32 8233 25764 654798 65963 256 64 14305 62409 410953 802614 256 128 10145 16253 1201314 349206 256 256 9546 24941 413644 1219045 512 4 4125 7392 27379 27497 512 8 2601 10517 249018 104086 512 16 19541 25244 167056 186384 512 32 27648 30741 445553 84811 512 64 18806 78963 391390 747521 512 128 21936 78735 242412 291231 512 256 29967 79439 595397 258832 512 512 21373 163048 1585086 1130370 1024 4 5146 7426 42354 64504 1024 8 4221 6980 49766 79943 1024 16 14105 39506 94318 392026 1024 32 8027 27958 645684 340416 1024 64 23107 32685 450309 454503 1024 128 28287 63832 550862 439526 1024 256 33985 88866 1369216 216395 1024 512 51089 37720 1470977 939446 2048 4 2849 5093 37222 40050 2048 8 6289 10360 66742 101035 2048 16 11535 12147 140756 141643 2048 32 15493 22805 326951 79391 2048 64 25501 25552 918433 413737 2048 128 26388 75073 1369174 1014902 2048 256 18535 29443 464300 1206145 2048 512 22461 20190 205457 652839 4096 4 3790 4760 55004 26057 4096 8 13826 20421 134071 162623 4096 16 18951 12268 137182 177654 4096 32 16705 26235 510018 236941 4096 64 38046 49166 360468 219602 4096 128 30172 31508 298371 207928 4096 256 70530 98366 875951 663627 4096 512 44284 33081 345131 289472 8192 4 3934 5439 113380 56282 8192 8 8887 8919 69032 46658 8192 16 12767 19079 187150 334323 8192 32 25569 29600 125056 212823 8192 64 13119 35080 502446 350431 8192 128 31863 33775 365518 233576 8192 256 22822 27930 923033 343436 8192 512 27753 32857 579844 621122 16384 4 4093 5466 47851 45842 16384 8 10987 11751 64450 79739 16384 16 15486 13525 260233 353286 16384 32 32183 26379 442094 398434 16384 64 36607 56496 582853 411472 16384 128 34567 89390 501793 571325 16384 256 42772 34490 319575 407248 16384 512 49153 96919 1306433 711324 32768 4 6218 6207 84852 60515 32768 8