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: Mon Aug 24 07:05:45 2026 Auto Mode Machine = Linux oleg606-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-oleg606-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 2856 7907 603489 525513 64 8 2338 12296 877797 712397 64 16 5039 26889 852702 191083 64 32 2524 42408 202469 456673 64 64 2690 85548 1143223 1734015 128 4 2348 4106 172527 164341 128 8 7107 7385 947186 819893 128 16 5408 33498 1085013 506097 128 32 5625 26800 1359835 1278855 128 64 5271 37580 819893 1373754 128 128 8266 89570 940549 1022989 256 4 6673 4384 463657 370536 256 8 12745 19398 831194 500857 256 16 14833 19489 947860 644965 256 32 16322 44795 1190657 1080434 256 64 23000 49865 1230218 516270 256 128 15622 44732 850282 1694118 256 256 14189 137927 581719 1463250 512 4 7736 8056 428143 103076 512 8 6483 5467 929322 736750 512 16 18706 34181 1177473 698412 512 32 11766 19182 1387437 497585 512 64 12758 22646 1458090 526756 512 128 36150 29717 1434711 962218 512 256 19155 122344 1677976 1210664 512 512 34357 72594 558832 2152206 1024 4 8184 9655 529732 215764 1024 8 8943 15474 220494 471673 1024 16 17294 15094 581437 778665 1024 32 23774 39408 1267398 669748 1024 64 20342 50990 1253344 696578 1024 128 18060 29120 1494522 1402756 1024 256 12732 86609 798053 1333507 1024 512 30796 61380 1662264 471673 2048 4 6266 9336 254088 259234 2048 8 8665 8086 235943 167019 2048 16 16546 21489 685614 473958 2048 32 27244 26754 1178348 323637 2048 64 17271 29609 898640 552023 2048 128 27044 49195 602514 329737 2048 256 36038 60466 423049 790111 2048 512 44159 66216 922180 558665 4096 4 8022 6795 152126 292927 4096 8 14637 13341 246289 239825 4096 16 14329 26247 506186 428267 4096 32 22766 26375 1138734 580915 4096 64 30668 1495 384536 1531209 4096 128 20886 28823 313433 237504 4096 256 33560 43691 873368 722031 4096 512 27811 53694 422839 705834 8192 4 6993 6116 158021 278944 8192 8 10201 10723 399746 253142 8192 16 15148 12719 488287 407768 8192 32 20937 31307 767681 742771 8192 64 21533 39009 648054 606143 8192 128 26881 39278 791720 625771 8192 256 35789 34569 743849 586906 8192 512 43860 60990 883129 226292 16384 4 5477 6408 444421 215865 16384 8 11169 14869 571410 461456 16384 16 18244 14765 231949 315004 16384 32 18355 25417 916885 734050 16384 64 26115 28914 1002007 477083 16384 128 30097 45468 641477 362680 16384 256 42345 43851 723798 1008063 16384 512 31119 50141 950624 730515 32768 4 5609 6641 484347 325127 32768 8 10418 12467 432210 276024 32768 16 18344 17193 741007 330356 32768 32