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: Fri Aug 14 02:31:21 2026 Auto Mode Machine = Linux oleg327-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-oleg327-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 3271 9175 555990 29893 64 8 1231 13242 1163036 735831 64 16 6398 11319 799377 288390 64 32 6469 55937 866463 1722886 64 64 2492 9364 1526887 115316 128 4 4284 2742 499970 392792 128 8 5124 3430 238842 830034 128 16 4272 7349 870405 609522 128 32 3078 46991 669577 876086 128 64 6537 22546 1130717 1266785 128 128 7434 23464 1363288 1939522 256 4 2376 6217 632056 556687 256 8 4108 8289 889002 658008 256 16 11580 19712 1213534 423098 256 32 8028 76718 1272498 980760 256 64 6614 21467 521283 411583 256 128 7600 25674 1400278 438296 256 256 7380 99569 449112 1942349 512 4 3416 2026 486317 565751 512 8 7249 11227 887461 170600 512 16 8461 24609 1199171 924123 512 32 7263 15225 1105920 507822 512 64 11364 39727 1354190 1300082 512 128 20819 31581 273223 1399189 512 256 27346 48297 871966 1672748 512 512 37453 36751 1667552 1992458 1024 4 5257 5122 426858 191109 1024 8 4483 7704 188716 162695 1024 16 8385 18860 232728 1014925 1024 32 6391 37070 1001903 713591 1024 64 12492 41695 427198 796868 1024 128 26840 18074 1211964 1013967 1024 256 13251 91062 1254808 250613 1024 512 30340 55051 419151 399204 2048 4 5798 5888 193629 243929 2048 8 8963 10567 606085 695890 2048 16 9821 11793 418555 282872 2048 32 19671 62377 622648 670993 2048 64 15854 53390 1045410 472316 2048 128 19431 103240 894337 878244 2048 256 32256 35861 489488 339633 2048 512 18156 38161 272412 567149 4096 4 5967 9201 442862 405905 4096 8 10804 10971 218849 429166 4096 16 12270 16400 418553 442292 4096 32 20349 38237 1364910 303339 4096 64 23639 41827 756429 673567 4096 128 29417 39830 663730 768337 4096 256 31131 62291 719852 284544 4096 512 32813 47451 1508619 790104 8192 4 8738 6141 193367 227688 8192 8 7763 7238 367468 185284 8192 16 12134 16878 364231 518811 8192 32 15846 29305 709944 614512 8192 64 31045 32999 663702 593967 8192 128 37004 30922 704630 560062 8192 256 23873 35306 874275 465164 8192 512 25799 40528 446214 289748 16384 4 4570 5009 217392 216330 16384 8 9809 10492 592144 533765 16384 16 16308 17859 532879 278876 16384 32 20574 28987 623578 550258 16384 64 30102 35585 530567 509184 16384 128 26339 43774 871943 744387 16384 256 29879 42514 651580 333891 16384 512 32842 43764 895988 596798 32768 4 5644 5789 284310 214956 32768 8