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 Aug 27 10:49:36 2026 Auto Mode Machine = Linux oleg627-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-oleg627-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 2872 4899 610350 561808 64 8 4246 18653 811459 271200 64 16 2485 35630 1017549 855419 64 32 2493 35873 620221 1363961 64 64 3132 46005 877797 653436 128 4 4263 6126 85737 433727 128 8 2408 11964 864797 771581 128 16 4445 29459 238312 470194 128 32 4904 45812 613002 564055 128 64 6790 34641 1387960 1349580 128 128 2763 83160 805138 1939522 256 4 7024 4952 124871 431775 256 8 6982 14771 303333 738065 256 16 13018 24419 1045710 891956 256 32 13183 41858 927393 544823 256 64 5688 47189 1340826 269188 256 128 8710 75119 1153561 958864 256 256 10685 58445 71071 1173737 512 4 3925 6425 600223 599553 512 8 6805 12865 797489 408903 512 16 13555 11238 187196 364982 512 32 19212 49937 1110496 762112 512 64 8411 37503 960926 540137 512 128 14852 79478 948197 1527582 512 256 12406 80289 191469 1679288 512 512 19401 32736 1467055 1854787 1024 4 6524 4615 334087 207749 1024 8 6806 11977 173115 261620 1024 16 20101 11974 383246 503938 1024 32 23345 31673 1091809 270331 1024 64 12417 38157 858340 176792 1024 128 20008 68225 873705 1200447 1024 256 35818 50995 583174 226494 1024 512 31368 77265 1248607 1256644 2048 4 5916 8090 455704 230164 2048 8 10357 14632 174820 184456 2048 16 12725 16911 569518 660824 2048 32 19527 33553 366702 692133 2048 64 20398 51936 269752 401496 2048 128 24278 36657 425080 337564 2048 256 28754 39685 316985 1309480 2048 512 36533 61643 788587 346231 4096 4 5449 7641 361515 385148 4096 8 15878 12341 399338 335545 4096 16 24260 15780 818720 419545 4096 32 26464 30616 624386 375673 4096 64 32352 43719 965768 471627 4096 128 41169 87278 982222 1428702 4096 256 29872 81466 807407 697778 4096 512 29059 46388 747444 753344 8192 4 6587 6302 149557 150807 8192 8 9437 13449 298682 552577 8192 16 2639 20010 403009 341990 8192 32 15704 19083 260908 480415 8192 64 23537 35983 617649 328258 8192 128 21799 41711 792871 559980 8192 256 35568 39215 1317231 901219 8192 512 30896 58046 784830 483022 16384 4 5617 6160 361805 123807 16384 8 9787 10480 257015 278568 16384 16 17428 15819 457819 259832 16384 32 19909 24339 876470 480808 16384 64 31990 41009 742802 510436 16384 128 34163 37229 406348 300205 16384 256 23055 42560 1069234 773051 16384 512 35089 46573 972581 662677 32768 4 6819 8848 288872 325160 32768 8 13982 14965 374727 643456 32768 16 19568 18523 832202 497917 32768 32 26460 25068 850742 631187 32768 64 28522 35664 1111122 848541 32768 128 33408 43272 884763 668569 32768 256 28702 47995 1234576 772155 32768 512 34432 49978 685625 728516 65536 4