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
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}
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