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John Plevyak commented on TS-724: --------------------------------- FYI a single document ends up on a single disk. If we could get the per-"partition" cache stats we could see what ATS thought was going on. > disk IO balance in v2.1.7 > ------------------------- > > Key: TS-724 > URL: https://issues.apache.org/jira/browse/TS-724 > Project: Traffic Server > Issue Type: Bug > Components: Core > Affects Versions: 2.1.7 > Environment: reporting from users, and confirm within my testing evn. > v2.1.7 only > Reporter: Zhao Yongming > Priority: Critical > Fix For: 2.1.9 > > > when multiple disk enabled, the disk IO will show much diff in v2.1.7, here > is my result on a 7 disk system result: > {code:none} > [root@cache189 ~]# iostat -x 5 > Linux 2.6.18-164.11.1.el5 (cache189.cn8) 03/29/2011 > avg-cpu: %user %nice %system %iowait %steal %idle > 0.51 0.00 0.54 1.77 0.00 97.18 > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz > avgqu-sz await svctm %util > sdb 0.00 0.00 11.80 0.00 360.80 0.00 30.58 > 0.07 5.73 5.56 6.56 > sdc 0.00 0.00 12.00 0.00 413.80 0.00 34.48 > 0.07 5.42 5.30 6.36 > sdd 0.00 0.00 11.60 1.40 375.80 820.80 92.05 > 0.07 5.06 4.66 6.06 > sde 0.00 0.00 13.00 14.00 722.60 8192.00 330.17 > 0.12 4.50 2.99 8.06 > sdf 0.00 0.00 14.60 0.00 579.40 0.00 39.68 > 0.11 7.48 7.04 10.28 > sdg 0.00 0.00 49.20 0.00 18268.60 0.00 371.31 > 0.08 1.66 0.54 2.66 > sdb 0.00 0.00 11.60 0.00 253.60 0.00 21.86 > 0.06 5.45 5.12 5.94 > sdc 0.00 0.00 15.80 0.00 738.20 0.00 46.72 > 0.08 5.22 4.76 7.52 > sdd 0.00 0.00 10.80 0.00 728.40 0.00 67.44 > 0.06 5.81 5.48 5.92 > sde 0.00 0.00 11.60 2.00 377.60 1027.20 103.29 > 0.07 5.18 4.75 6.46 > sdf 0.00 0.00 14.60 0.00 473.60 0.00 32.44 > 0.09 5.90 5.78 8.44 > sdg 0.00 0.00 87.00 0.00 37454.80 0.00 430.51 > 0.37 4.26 0.82 7.12 > sdb 0.00 0.00 15.80 0.00 786.40 0.00 49.77 > 0.10 6.56 5.76 9.10 > sdc 0.00 0.00 10.20 1.60 217.60 911.20 95.66 > 0.06 4.93 4.51 5.32 > sdd 0.00 0.00 13.00 0.00 665.00 0.00 51.15 > 0.08 6.12 5.80 7.54 > sde 0.00 0.00 11.60 0.00 419.40 0.00 36.16 > 0.06 5.43 5.17 6.00 > sdf 0.00 0.00 11.00 1.40 315.00 826.80 92.08 > 0.07 5.27 4.89 6.06 > sdg 0.00 0.00 27.00 0.00 8629.60 0.00 319.61 > 0.02 0.87 0.37 1.00 > sdb 0.00 0.00 12.80 0.00 380.00 0.00 29.69 > 0.07 5.22 4.98 6.38 > sdc 0.00 0.00 14.80 0.00 495.80 0.00 33.50 > 0.08 5.39 5.19 7.68 > sdd 0.00 0.00 10.40 0.00 267.40 0.00 25.71 > 0.06 5.87 5.46 5.68 > sde 0.00 0.00 12.20 0.00 691.20 0.00 56.66 > 0.07 5.93 5.48 6.68 > sdf 0.00 0.00 11.80 0.00 544.40 0.00 46.14 > 0.07 5.83 5.63 6.64 > sdg 0.00 0.00 57.00 0.00 22033.00 0.00 386.54 > 0.06 1.07 0.38 2.16 > sdb 0.00 0.00 13.20 0.00 546.40 0.00 41.39 > 0.08 5.73 5.73 7.56 > sdc 0.00 0.00 14.00 0.00 583.60 0.00 41.69 > 0.08 5.57 5.34 7.48 > sdd 0.00 0.00 12.80 0.00 639.20 0.00 49.94 > 0.07 5.61 5.14 6.58 > sde 0.00 0.00 12.40 0.00 403.20 0.00 32.52 > 0.26 20.98 11.03 13.68 > sdf 0.00 0.00 15.00 0.00 475.80 0.00 31.72 > 0.09 5.71 5.37 8.06 > sdg 0.00 0.00 91.80 0.00 39239.00 0.00 427.44 > 0.57 6.24 0.76 6.94 > sdb 0.00 0.00 10.60 0.00 326.60 0.00 30.81 > 0.06 5.60 5.04 5.34 > sdc 0.00 0.00 12.80 0.00 644.40 0.00 50.34 > 0.07 5.72 5.27 6.74 > sdd 0.00 0.00 14.80 0.00 624.00 0.00 42.16 > 0.08 5.61 5.50 8.14 > sde 0.00 0.00 9.20 0.00 283.00 0.00 30.76 > 0.05 5.83 5.67 5.22 > sdf 0.00 0.00 13.40 0.00 578.00 0.00 43.13 > 0.07 5.39 5.15 6.90 > sdg 0.00 0.00 12.80 0.00 680.80 0.00 53.19 > 0.01 0.41 0.33 0.42 > sdb 0.00 0.00 11.38 0.00 431.94 0.00 37.96 > 0.07 5.79 5.37 6.11 > sdc 0.00 0.00 12.18 0.00 323.55 0.00 26.57 > 0.07 5.82 5.66 6.89 > sdd 0.00 0.00 13.97 1.40 630.14 817.96 94.22 > 0.09 5.66 5.25 8.06 > sde 0.00 0.00 10.18 0.00 410.78 0.00 40.35 > 0.06 5.65 5.27 5.37 > sdf 0.00 0.00 12.77 0.00 634.93 0.00 49.70 > 0.07 5.55 5.50 7.03 > sdg 0.00 0.00 61.68 1.40 23901.80 818.36 391.92 > 0.15 2.36 0.73 4.61 > sdb 0.00 0.00 11.00 1.40 396.60 819.20 98.05 > 0.08 6.42 5.74 7.12 > sdc 0.00 0.00 10.80 0.00 394.20 0.00 36.50 > 0.06 5.37 5.26 5.68 > sdd 0.00 0.00 11.60 0.00 460.40 0.00 39.69 > 0.06 5.22 4.95 5.74 > sde 0.00 0.00 12.00 0.00 237.80 0.00 19.82 > 0.06 5.00 4.92 5.90 > sdf 0.00 0.00 11.20 0.00 496.00 0.00 44.29 > 0.06 5.52 5.32 5.96 > sdg 0.00 0.00 90.00 0.00 39829.60 0.00 442.55 > 0.22 2.41 0.76 6.82 > sdb 0.00 0.00 10.00 0.00 319.80 0.00 31.98 > 0.15 15.02 12.02 12.02 > sdc 0.00 0.00 13.40 0.00 326.40 0.00 24.36 > 0.09 6.81 6.22 8.34 > sdd 0.00 0.00 14.20 0.00 449.20 0.00 31.63 > 0.08 5.69 5.30 7.52 > sde 0.00 0.00 14.40 1.40 437.80 828.80 80.16 > 0.92 58.00 13.09 20.68 > sdf 0.00 0.00 9.60 0.00 339.80 0.00 35.40 > 0.06 5.81 5.69 5.46 > sdg 0.00 0.00 86.00 0.00 36594.20 0.00 425.51 > 0.10 1.15 0.36 3.12 > sdb 0.00 0.00 10.80 0.00 347.20 0.00 32.15 > 0.06 5.43 5.19 5.60 > sdc 0.00 0.00 15.00 0.00 484.20 0.00 32.28 > 0.08 5.60 5.43 8.14 > sdd 0.00 0.00 13.80 0.00 336.20 0.00 24.36 > 0.07 5.28 5.12 7.06 > sde 0.00 0.00 12.20 0.00 814.00 0.00 66.72 > 0.07 5.43 5.34 6.52 > sdf 0.00 0.00 12.60 0.00 461.20 0.00 36.60 > 0.07 5.92 5.52 6.96 > sdg 0.00 0.00 204.00 0.00 96744.40 0.00 474.24 > 1.32 6.47 0.62 12.62 > sdb 0.00 0.00 14.00 0.00 732.00 0.00 52.29 > 0.09 6.07 5.30 7.42 > sdc 0.00 0.00 15.60 0.00 705.40 0.00 45.22 > 0.09 5.91 5.62 8.76 > sdd 0.00 0.00 10.60 0.00 577.80 0.00 54.51 > 0.06 5.89 5.70 6.04 > sde 0.00 0.00 10.20 0.00 314.40 0.00 30.82 > 0.05 5.31 4.98 5.08 > sdf 0.00 0.00 13.60 0.00 581.40 0.00 42.75 > 0.07 5.46 5.37 7.30 > sdg 0.00 0.00 130.40 0.00 60000.00 0.00 460.12 > 0.39 3.01 0.52 6.84 > sdb 0.00 0.00 11.60 0.00 427.60 0.00 36.86 > 0.06 5.50 5.34 6.20 > sdc 0.00 0.00 13.20 1.40 474.60 889.60 93.44 > 0.08 5.44 5.00 7.30 > sdd 0.00 0.00 12.60 0.00 505.60 0.00 40.13 > 0.07 5.51 5.21 6.56 > sde 0.00 0.00 12.20 0.00 884.00 0.00 72.46 > 0.07 5.89 5.15 6.28 > sdf 0.00 0.00 11.80 0.00 558.20 0.00 47.31 > 0.07 5.88 5.56 6.56 > sdg 0.00 0.00 104.60 0.00 47564.80 0.00 454.73 > 0.12 1.12 0.40 4.18 > {code} > here is my system status: > {code:none} > Bytes Used --- 201 GB > Cache Size --- 976 GB > HTTP Transaction Frequency and Speeds > Transaction Type Frequency Speed(ms) > --Hits-- > Fresh ----------------------- 80.893448 % 14 > Stale Revalidated ----------- 0.135829 % 0 > --Misses-- > Now Cached ------------------ 7.123453 % 3 > Server No Cache ------------- 11.500151 % 0 > Stale Reloaded -------------- 0.196197 % 0 > Client No Cache ------------- 0.000000 % 0 > {code} -- This message is automatically generated by JIRA. 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