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: Sat Aug 22 05:56:11 2026 Auto Mode Machine = Linux oleg207-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-oleg207-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 1518 2243 542506 158761 64 8 2953 11487 789967 763021 64 16 2928 7817 321554 528618 64 32 6123 34539 1163036 913649 64 64 7136 50957 1033216 1879725 128 4 7157 11186 425478 520321 128 8 5156 18454 789741 646983 128 16 7674 27656 983630 805138 128 32 14019 52053 803932 962469 128 64 8649 80048 1220700 1183041 128 128 6026 87913 1487977 1852520 256 4 3044 6840 501794 535583 256 8 6013 15324 58687 759469 256 16 4859 28897 951219 613985 256 32 21503 32845 1952947 440634 256 64 13616 11663 548161 940389 256 128 15288 102477 1347557 1027695 256 256 12507 77577 802614 1956506 512 4 6226 4565 354089 361054 512 8 12644 5594 102237 87222 512 16 16591 30452 426697 817837 512 32 20220 47167 835334 541227 512 64 24442 34330 927716 875164 512 128 26446 81310 846197 1043072 512 256 35407 85547 1326585 622133 512 512 31271 122253 1520013 1657257 1024 4 8906 10161 224505 278716 1024 8 14749 19304 720534 469046 1024 16 18427 32562 1057924 791435 1024 32 11692 15068 588851 936987 1024 64 9652 28558 196657 472763 1024 128 35382 27406 808265 542101 1024 256 21120 44628 1499217 812701 1024 512 24600 44275 1544504 1021928 2048 4 3904 6354 389958 493992 2048 8 12209 10521 367675 208890 2048 16 13226 14405 1040094 880494 2048 32 14890 26161 408620 982177 2048 64 19076 17924 599152 1155834 2048 128 17184 40219 522190 800343 2048 256 30151 50103 725206 791348 2048 512 27512 38479 561550 480991 4096 4 5397 5669 217536 248832 4096 8 12401 14067 399487 230244 4096 16 17327 19391 623638 561859 4096 32 17631 27175 676804 668300 4096 64 26486 35643 734722 545188 4096 128 20020 31177 1477608 364901 4096 256 31169 43410 1556880 403143 4096 512 37636 41203 517157 569043 8192 4 7750 5466 143362 213890 8192 8 8851 12988 358654 452746 8192 16 14780 21013 672746 586565 8192 32 18601 21496 538918 765594 8192 64 25085 56834 675126 599094 8192 128 29818 32397 439935 368592 8192 256 28543 46538 1272450 516650 8192 512 40055 50594 824551 821005 16384 4 5556 4688 206098 412559 16384 8 11478 12976 404085 438108 16384 16 17805 21932 489835 571548 16384 32 22337 34926 1601411 721284 16384 64 22979 37855 615916 374987 16384 128 32327 42648 999079 769631 16384 256 23679 42904 544011 517190 16384 512 28602 67935 909459 343134 32768 4 3955 4490 442542 414674 32768 8