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 Jul 25 06:53:20 2025 Auto Mode Machine = Linux oleg104-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-oleg104-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 9640 18207 213246 266620 64 8 9417 28986 423529 342477 64 16 13778 50073 603489 799377 64 32 13674 83864 913649 969761 64 64 12215 90510 1105556 1163036 128 4 12609 20440 296318 282592 128 8 14440 30570 387966 445978 128 16 22599 47794 711270 646205 128 32 22272 61803 1561553 811221 128 64 28616 85737 1152564 1152564 128 128 20952 96320 1406136 2905056 256 4 12824 18307 231021 217321 256 8 19627 30814 392047 385018 256 16 26719 48293 748353 573946 256 32 26561 77881 1143731 820398 256 64 37881 100794 1173737 850282 256 128 22055 120067 1400278 725106 256 256 36271 115669 1570244 1642294 512 4 14689 18389 284253 342511 512 8 21242 33070 428827 296785 512 16 33593 45526 742096 506863 512 32 51189 66518 803757 851903 512 64 43485 104025 1155924 1153441 512 128 42015 121906 1150351 1196499 512 256 46685 119233 1541840 1233614 512 512 55706 123847 2265742 2613128 1024 4 17781 19614 318315 254987 1024 8 27330 33065 512476 402534 1024 16 41820 55303 677674 723691 1024 32 53070 77616 902340 846331 1024 64 67143 104244 1226500 1000969 1024 128 62154 117961 1544504 1378002 1024 256 73674 130546 1759651 1347311 1024 512 61936 136422 1615374 1523683 2048 4 16676 18784 250795 259273 2048 8 28913 31784 453898 453299 2048 16 41809 52585 691186 555019 2048 32 58860 68653 901091 756835 2048 64 70657 103131 1368084 1076189 2048 128 75051 124551 1499166 1296045 2048 256 78885 116874 1505736 1526066 2048 512 82136 148965 1594920 1569566 4096 4 18283 19184 282174 282615 4096 8 29055 31881 492431 395787 4096 16 42790 55353 737086 631014 4096 32 61876 79007 1003215 868907 4096 64 70033 90289 1165937 921478 4096 128 71185 102152 1422197 1251829 4096 256 85304 124294 1713052 1309460 4096 512 85479 123902 1483477 1546230 8192 4 17363 18612 286924 273430 8192 8 30358 33685 496759 477837 8192 16 42710 53131 696432 596162 8192 32 60313 78988 1003180 918591 8192 64 74114 103071 1236148 1099307 8192 128 86203 108976 1398396 1226879 8192 256 84853 123952 1633859 1386378 8192 512 93035 131294 1718433 1252003 16384 4 17878 19732 293857 292560 16384 8 30259 34068 476974 486227 16384 16 46268 56073 704867 557829 16384 32 64532 76811 856725 788711 16384 64 74744 100018 1211475 770606 16384 128 85040 117533 1426046 1291408 16384 256 86822 107947 1355713 998846 16384 512 87000 126383 1658816 1537423 32768 4 17799 18400 300400 275070 32768 8 29061 33182 488790 430675 32768 16 46595 51986 743054 741359 32768 32