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 Oct 23 12:49:13 2025 Auto Mode Machine = Linux oleg601-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-oleg601-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 5681 15716 223732 262450 64 8 2645 9138 447537 420873 64 16 8946 45684 659861 603489 64 32 6930 35164 666414 792299 64 64 3237 78817 1101022 1226821 128 4 7281 10714 280086 157449 128 8 13102 24261 447464 85792 128 16 7263 48393 695603 526444 128 32 8083 28192 1022989 819893 128 64 17417 93355 1316487 1032829 128 128 15155 98223 54307 1684006 256 4 4988 18240 316103 302564 256 8 10342 32947 505812 311066 256 16 20079 54760 176317 629094 256 32 13183 60476 1062263 873809 256 64 31468 94671 1190657 1123389 256 128 14227 100907 1437779 1237306 256 256 18771 41323 1629830 1632308 512 4 10266 14317 233021 245207 512 8 13698 25061 498509 202864 512 16 17029 44999 642419 597551 512 32 27447 67913 831132 829847 512 64 25846 50592 1261144 620515 512 128 30587 33197 1358474 500018 512 256 43189 104792 1834193 1705969 512 512 16129 52577 1783912 1961520 1024 4 6162 6483 294099 223430 1024 8 18721 29085 495393 237306 1024 16 27103 39688 656842 481455 1024 32 37260 34051 187956 906913 1024 64 23610 101127 1117664 1089317 1024 128 31586 58481 332458 596042 1024 256 24957 40628 142975 1254808 1024 512 31486 100186 543267 1652033 2048 4 7932 8598 161934 171795 2048 8 16201 25545 428280 351056 2048 16 25345 45956 653485 536274 2048 32 25799 51017 331608 371893 2048 64 25742 41818 145424 1065510 2048 128 63600 74162 1353426 1175607 2048 256 51520 89683 1602358 1394061 2048 512 24586 129554 1540849 1526066 4096 4 9784 7396 189201 210527 4096 8 21322 12945 267395 238278 4096 16 23951 26498 341678 457083 4096 32 49040 24536 774293 655249 4096 64 54780 65912 463034 488441 4096 128 56678 85933 1361665 1228906 4096 256 49799 44477 1024025 1365344 4096 512 60876 67035 1608028 1515272 8192 4 7310 7744 156392 169526 8192 8 11730 12291 403929 273632 8192 16 25575 16510 441427 502263 8192 32 22399 49792 596380 769710 8192 64 26374 39484 1360792 1086755 8192 128 40914 49888 1203290 635681 8192 256 29953 68575 1459768 1100363 8192 512 41662 59625 1482185 1629906 16384 4 7721 8662 141045 152932 16384 8 12445 16814 319164 226803 16384 16 18112 21868 409498 402940 16384 32 23743 32523 322340 474789 16384 64 38555 48429 1019534 903350 16384 128 38068 60708 858158 321803 16384 256 36174 48304 357175 560249 16384 512 49999 65973 685174 1257014 32768 4 7722 8243 194261 158490 32768 8 11914 11005 261010 162282 32768 16 17793 29173 583466 392220 32768 32 24138 39755 380739 412534 32768 64 36847 40016 683022 819690 32768 128 32295 40707 749477 759924 32768 256 40301 34876 512497 959730 32768 512 32337 47451 1511168 663306 65536 4