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: Tue Sep 15 10:04:41 2026 Auto Mode Machine = Linux oleg158-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-oleg158-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 5165 17172 666414 866463 64 8 5988 19018 901377 633392 64 16 9356 47723 565358 592827 64 32 9701 42414 913649 969761 64 64 6526 68082 769584 1599680 128 4 5290 5632 243389 677178 128 8 10605 13197 309292 780556 128 16 11116 36517 692017 624409 128 32 4375 29323 1346196 962469 128 64 11721 105791 1240443 1306873 128 128 18518 100957 1332828 1658003 256 4 8979 14928 706964 350689 256 8 6417 19900 737558 616807 256 16 8091 31321 1201314 1003679 256 32 23708 64385 1704877 562815 256 64 18556 82267 1137672 1024752 256 128 26845 18811 1610276 1224606 256 256 13068 30831 805021 3326279 512 4 10114 8559 98613 127584 512 8 9807 9195 294748 196174 512 16 21636 41495 1329871 673655 512 32 35736 69104 1413929 1014013 512 64 50753 39804 898225 670919 512 128 43884 179273 853257 744153 512 256 18288 104572 1476130 1375881 512 512 35679 76247 1373241 2796910 1024 4 9829 6748 511743 589821 1024 8 19283 29036 732453 783494 1024 16 25083 53920 1305935 1178380 1024 32 36726 32349 153431 784640 1024 64 16253 44315 1271902 973296 1024 128 30725 97942 1580306 1175799 1024 256 35367 49691 1735476 1334750 1024 512 22501 115057 1573360 353588 2048 4 7305 8434 312909 249302 2048 8 11961 13957 230084 300160 2048 16 21029 18760 354197 831165 2048 32 24121 34167 726249 430620 2048 64 21708 37133 1294482 812301 2048 128 28228 40632 250853 385254 2048 256 19106 54516 1289623 331929 2048 512 22059 63155 566700 1119675 4096 4 9428 9680 322543 397362 4096 8 17682 21097 452497 334532 4096 16 15848 24219 684707 563185 4096 32 21143 20912 288248 331013 4096 64 20736 39806 1310759 346062 4096 128 27403 84284 1932970 1408901 4096 256 45977 92318 1078202 923162 4096 512 41387 56208 724314 542656 8192 4 9816 8752 344086 395385 8192 8 16797 18974 515186 311046 8192 16 21028 3134 343481 381005 8192 32 23021 27897 705063 461881 8192 64 32196 37288 788740 515449 8192 128 35481 60466 1155889 1146669 8192 256 42729 47342 1292311 989258 8192 512 52353 59008 1361924 1521836 16384 4 8990 8215 297144 343632 16384 8 9930 12313 460226 200489 16384 16 15976 21182 732056 467206 16384 32 20164 24785 827767 607240 16384 64 24728 23884 713591 413958 16384 128 29811 34425 514037 331739 16384 256 33601 53806 1247544 1150390 16384 512 39676 67754 843454 819818 32768 4 7541 8042 335065 306457 32768 8 13705 13593 508442 579010 32768 16 21777 24422 367803 298158 32768 32 23568 30546 424174 317744 32768 64 28929 32850 407603 334691 32768 128 32724 42208 884592 936335 32768 256 39838 53603 1095875 532761 32768 512 37610 73577 1326057 1265472 65536 4