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 May 25 04:52:05 2026 Auto Mode Machine = Linux oleg321-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-oleg321-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 1367 6964 634890 542506 64 8 1538 7550 496362 801764 64 16 2861 8450 1143223 901377 64 32 4364 29547 1392258 1183548 64 64 3161 35592 1330167 1828508 128 4 2385 5107 624409 569439 128 8 1822 7112 805138 414314 128 16 5093 24648 1059322 1155043 128 32 8005 26975 1243315 1175271 128 64 2921 48816 1332828 631014 128 128 8030 37549 285599 1975201 256 4 5376 8473 602614 570288 256 8 8657 20058 797843 260945 256 16 5133 17044 1197295 836374 256 32 4739 23542 1332507 1062263 256 64 13392 60093 468104 1237306 256 128 7936 52245 1561112 1471270 256 256 8722 60592 1003679 2000242 512 4 6499 7188 225746 123576 512 8 5119 8850 988345 341314 512 16 8666 7937 1218910 1009722 512 32 13941 51560 806171 173564 512 64 19841 40784 1323315 1160923 512 128 7140 37098 1655979 1316016 512 256 12941 47726 1120344 727268 512 512 14209 81477 552932 807383 1024 4 2489 3649 352369 317140 1024 8 5049 13431 530059 315462 1024 16 7895 20786 244632 838565 1024 32 15184 16362 640389 124485 1024 64 22068 37940 1208894 652254 1024 128 24000 46441 1349004 1027060 1024 256 15170 43591 1207534 1349004 1024 512 27549 62389 440789 656842 2048 4 3515 3976 297067 153548 2048 8 5692 9907 367031 704046 2048 16 6898 10321 278714 564354 2048 32 11968 10975 427555 998155 2048 64 11127 43193 576745 1092754 2048 128 23680 44758 722705 420625 2048 256 16997 40627 135503 416930 2048 512 28245 30944 340144 318301 4096 4 3940 6661 308802 298651 4096 8 5454 7950 318932 394914 4096 16 13180 9398 829832 453452 4096 32 12672 16102 479338 336980 4096 64 18504 36647 594319 1531755 4096 128 22281 21980 336399 230022 4096 256 24080 31644 313508 564332 4096 512 25140 66412 1163332 489304 8192 4 4375 5021 315624 309074 8192 8 8344 8738 389461 249012 8192 16 19870 23248 226335 506207 8192 32 27833 29403 693648 324039 8192 64 16217 32396 699394 415053 8192 128 24980 33464 682108 393980 8192 256 30571 35999 572111 237793 8192 512 30953 46316 961251 778323 16384 4 4886 4658 216771 232700 16384 8 6819 7997 271929 321066 16384 16 10881 14637 384627 372193 16384 32 19337 18244 496320 278062 16384 64 15176 25618 649929 479008 16384 128 17068 27837 438424 769200 16384 256 25367 25709 302706 310338 16384 512 27694 29237 889954 392882 32768 4 3940 4853 311933 228661 32768 8