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 Oct 24 10:09:42 2025 Auto Mode Machine = Linux oleg412-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-oleg412-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 9123 22988 473593 571375 64 8 4548 15499 621657 780776 64 16 8702 57817 901377 769584 64 32 6529 45840 1124074 1013707 64 64 9849 71187 1210227 1526887 128 4 2581 15906 533771 498114 128 8 8791 32870 761728 586868 128 16 16888 43391 723735 809997 128 32 14244 42313 1102844 947186 128 64 9629 112086 1209698 1085013 128 128 21254 72926 1521718 1085013 256 4 16456 14975 193369 541253 256 8 9423 11169 785584 499925 256 16 9315 57580 969251 606700 256 32 28193 69661 1202660 709299 256 64 36076 110925 1286217 1080434 256 128 18534 126414 1213534 1376935 256 256 46410 122548 367744 236569 512 4 11802 14136 479476 502946 512 8 16086 37258 728255 44099 512 16 39063 64121 1099128 971357 512 32 27569 50543 949875 186384 512 64 54671 109779 1261144 727268 512 128 23518 33835 1605228 1422357 512 256 59068 164321 1650887 123165 512 512 59162 37117 1861217 2141475 1024 4 10241 10459 578851 454310 1024 8 7124 6388 461685 50245 1024 16 8978 36142 1032244 726752 1024 32 30356 68302 995171 1019744 1024 64 15226 95782 1329791 618710 1024 128 33286 117712 1548960 1360111 1024 256 51639 81717 1617199 1146913 1024 512 67373 158148 1495042 1408737 2048 4 11067 10030 155070 200512 2048 8 15071 12990 853038 720643 2048 16 44427 51427 262457 873333 2048 32 22438 50637 1216910 1003519 2048 64 36764 40045 1141549 1104132 2048 128 18570 83969 1283266 1265868 2048 256 39260 60320 1125839 1161617 2048 512 79073 78464 1573015 302869 4096 4 7554 9136 771096 436759 4096 8 27680 12368 250472 207951 4096 16 23913 27301 1068612 978697 4096 32 36946 40396 648008 917541 4096 64 35088 36479 1390879 1066952 4096 128 30476 44854 1476085 423182 4096 256 92206 77805 1633252 1415751 4096 512 34934 37945 698857 1074762 8192 4 2073 9664 511680 357326 8192 8 13913 16572 828388 509578 8192 16 20887 36095 452073 874364 8192 32 36078 56467 529509 864769 8192 64 44469 51634 611526 1043011 8192 128 46611 96478 1434476 1059772 8192 256 50247 102749 1352276 512833 8192 512 55158 95157 1623744 746840 16384 4 13436 14672 285485 228792 16384 8 20096 23318 799725 793987 16384 16 30675 63087 938421 893588 16384 32 36726 43498 1111537 827728 16384 64 51464 54035 676048 968387 16384 128 49312 69106 556501 892080 16384 256 47991 98940 1596871 994294 16384 512 52925 50437 1344914 1064645 32768 4 9934 11737 539620 457776 32768 8 16631 19509 324538 200037 32768 16 13522 20800 428368 443027 32768 32 27469 32548 682581 1014767 32768 64 50233 53464 1383022 393571 32768 128 50865 58117 1516537 730355 32768 256 44831 78641 1167657 1190568 32768 512 67271 59517 1642929 590863 65536 4