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 17:26:57 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 4944 12364 571375 598110 64 8 7815 29289 1452528 789967 64 16 8560 43068 913649 877797 64 32 4229 50233 1255511 91435 64 64 6259 70718 1599680 1722886 128 4 8335 5521 601330 566435 128 8 6210 14591 774922 722760 128 16 8050 22792 831319 333293 128 32 10425 34353 1332828 914904 128 64 14532 107744 1471662 1373754 128 128 13599 88405 1254941 1732927 256 4 5020 10012 439193 565185 256 8 8734 17081 797250 448362 256 16 7921 8105 1062263 437582 256 32 16352 72073 1175022 954602 256 64 11410 63113 1361224 1384034 256 128 22428 132156 1532153 1319408 256 256 19317 111155 977189 339061 512 4 10798 5828 319195 280247 512 8 9771 10891 935801 630536 512 16 19946 20785 515502 1014013 512 32 21668 39291 1399189 1044594 512 64 19583 33197 635198 901241 512 128 12381 127109 867738 1062161 512 256 17635 103017 540137 1480200 512 512 22804 25727 555363 565751 1024 4 7019 13521 206709 106025 1024 8 10758 12767 108728 253468 1024 16 16380 15226 1139005 879790 1024 32 30278 82386 1072453 432097 1024 64 44977 73511 453878 1012771 1024 128 23223 34039 1614767 1299612 1024 256 59152 102625 255747 1030263 1024 512 37472 116376 1727102 588206 2048 4 8695 12887 413916 205477 2048 8 8673 10183 891182 805673 2048 16 21891 27544 237311 280966 2048 32 16210 25952 686765 1104700 2048 64 12853 29022 714351 1268110 2048 128 37529 86228 865152 1342008 2048 256 26275 50923 1830057 1307088 2048 512 27594 62283 2202092 2356114 4096 4 4572 4857 278618 190947 4096 8 7711 7521 152381 170738 4096 16 8377 23470 483928 217409 4096 32 14339 16260 487388 267783 4096 64 25760 41711 413735 609522 4096 128 1754 58348 1409479 1112771 4096 256 24143 31281 693777 181786 4096 512 20128 33671 1788674 256321 8192 4 4242 4692 438548 297621 8192 8 11398 11673 379259 549247 8192 16 22939 24384 283812 341118 8192 32 23450 33823 785728 724128 8192 64 49555 32655 1301366 437164 8192 128 38016 47696 588172 744994 8192 256 58152 63583 1355210 334258 8192 512 33186 41676 944109 578770 16384 4 5016 7393 127209 192444 16384 8 13027 14657 569582 493643 16384 16 13293 17615 458818 596151 16384 32 38704 49676 654734 650932 16384 64 24874 56199 470073 931867 16384 128 43446 33716 739716 659820 16384 256 35255 45396 661420 468436 16384 512 45786 55542 741224 580642 32768 4 5678 6205 267837 225019 32768 8 10081 16137 508583 478428 32768 16 20014 22382 905193 572448 32768 32 22090 26937 1108594 962910 32768 64