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 Jul 13 09:19:25 2026 Auto Mode Machine = Linux oleg336-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-oleg336-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 1009 3301 347801 566551 64 8 3917 16120 561808 349613 64 16 3168 13327 695778 218452 64 32 6120 18901 1143223 84339 64 64 4251 22495 182261 1210227 128 4 1754 2063 148314 64389 128 8 2405 14845 715059 609522 128 16 6844 25295 985435 715059 128 32 4375 36790 1057236 877518 128 64 5302 77573 1185654 1093856 128 128 6563 95447 1220700 2035099 256 4 2749 3894 185774 521283 256 8 4759 5411 382004 739590 256 16 8496 28511 716876 780445 256 32 12184 42412 1132871 996229 256 64 6396 83418 1356067 1280084 256 128 7829 65369 47682 1304976 256 256 9312 145694 1168627 264415 512 4 8161 5168 294223 516618 512 8 11358 16503 264898 399992 512 16 13120 25594 1233614 629611 512 32 13132 34318 842214 994294 512 64 13455 27623 1410215 717069 512 128 15009 75008 1169140 1254513 512 256 23499 66979 661414 325287 512 512 8359 43433 788992 2216629 1024 4 3417 4460 137299 506672 1024 8 13436 22090 893517 309172 1024 16 12798 15533 245682 717046 1024 32 13184 36821 567306 960669 1024 64 20267 43377 1354535 723691 1024 128 21448 32310 1254808 1219189 1024 256 29862 30517 918354 318811 1024 512 12338 39197 1678504 350072 2048 4 4399 6269 396602 235613 2048 8 9015 8966 442328 261754 2048 16 15739 13498 568124 441873 2048 32 12270 23071 308992 437886 2048 64 18970 33431 674577 254502 2048 128 31306 34489 989417 179462 2048 256 35746 42448 485312 1722532 2048 512 47276 36220 353294 724167 4096 4 4834 5825 199775 157854 4096 8 7874 9947 843150 410797 4096 16 14667 13980 388028 258570 4096 32 13704 26375 508629 611235 4096 64 20059 34333 942043 510457 4096 128 16035 30392 707403 724192 4096 256 46861 42406 258827 414534 4096 512 33112 66543 412107 978530 8192 4 6609 6754 161852 185393 8192 8 7140 8101 440668 420164 8192 16 14978 14534 629912 384114 8192 32 11621 14285 178973 199047 8192 64 20167 63405 426200 988291 8192 128 21444 49336 819048 327417 8192 256 28596 47239 617416 629428 8192 512 40648 61501 445502 419672 16384 4 6505 6138 241359 178405 16384 8 9716 7974 251473 161652 16384 16 13816 18868 319294 344657 16384 32 18969 24077 292791 244457 16384 64 18388 30697 581118 766216 16384 128 20054 35654 840288 312917 16384 256 22046 50376 964269 526356 16384 512 40460 44153 610683 751387 32768 4