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https://issues.apache.org/jira/browse/TS-1222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13280353#comment-13280353
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Zhao Yongming commented on TS-1222:
-----------------------------------
here is the top report, with 20 ET_NETs + 10 ET_CLUSTERs, @13kqps * 2 nodes:
{code}
[root@test223 tmp]# top -b -H -n 1 |more
top - 02:36:23 up 8:52, 1 user, load average: 7.73, 7.26, 7.07
Tasks: 530 total, 12 running, 518 sleeping, 0 stopped, 0 zombie
Cpu(s): 20.3%us, 5.5%sy, 0.0%ni, 66.8%id, 4.9%wa, 0.0%hi, 2.6%si, 0.0%st
Mem: 24570208k total, 8605744k used, 15964464k free, 7780k buffers
Swap: 2097144k total, 7432k used, 2089712k free, 28452k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
16075 ats 20 0 11.9g 7.6g 5016 D 53.6 32.5 9:36.31 [ET_CLUSTER 3]
16076 ats 20 0 11.9g 7.6g 5016 D 44.3 32.5 7:39.06 [ET_CLUSTER 4]
16073 ats 20 0 11.9g 7.6g 5016 R 40.6 32.5 7:26.82 [ET_CLUSTER 1]
16080 ats 20 0 11.9g 7.6g 5016 D 40.6 32.5 7:21.94 [ET_CLUSTER 8]
16020 ats 20 0 11.9g 7.6g 5016 R 38.8 32.5 6:25.31 [ET_NET 2]
16074 ats 20 0 11.9g 7.6g 5016 R 38.8 32.5 7:03.35 [ET_CLUSTER 2]
16028 ats 20 0 11.9g 7.6g 5016 S 36.9 32.5 6:16.60 [ET_NET 10]
16033 ats 20 0 11.9g 7.6g 5016 R 35.1 32.5 6:23.01 [ET_NET 15]
16037 ats 20 0 11.9g 7.6g 5016 R 33.2 32.5 6:24.99 [ET_NET 19]
16026 ats 20 0 11.9g 7.6g 5016 S 31.4 32.5 6:24.66 [ET_NET 8]
16022 ats 20 0 11.9g 7.6g 5016 S 29.6 32.5 6:33.72 [ET_NET 4]
16072 ats 20 0 11.9g 7.6g 5016 D 27.7 32.5 4:41.45 [ET_CLUSTER 0]
16024 ats 20 0 11.9g 7.6g 5016 R 25.9 32.5 6:19.70 [ET_NET 6]
16025 ats 20 0 11.9g 7.6g 5016 S 25.9 32.5 6:22.40 [ET_NET 7]
16027 ats 20 0 11.9g 7.6g 5016 S 25.9 32.5 6:20.17 [ET_NET 9]
16032 ats 20 0 11.9g 7.6g 5016 S 25.9 32.5 6:26.90 [ET_NET 14]
16034 ats 20 0 11.9g 7.6g 5016 R 25.9 32.5 6:33.76 [ET_NET 16]
16035 ats 20 0 11.9g 7.6g 5016 S 25.9 32.5 6:35.37 [ET_NET 17]
16077 ats 20 0 11.9g 7.6g 5016 R 25.9 32.5 4:22.31 [ET_CLUSTER 5]
16078 ats 20 0 11.9g 7.6g 5016 R 25.9 32.5 4:24.50 [ET_CLUSTER 6]
16079 ats 20 0 11.9g 7.6g 5016 D 25.9 32.5 4:25.54 [ET_CLUSTER 7]
16081 ats 20 0 11.9g 7.6g 5016 S 25.9 32.5 4:38.39 [ET_CLUSTER 9]
16019 ats 20 0 11.9g 7.6g 5016 S 24.0 32.5 6:25.65 [ET_NET 1]
16029 ats 20 0 11.9g 7.6g 5016 S 24.0 32.5 6:22.07 [ET_NET 11]
16031 ats 20 0 11.9g 7.6g 5016 R 24.0 32.5 6:27.21 [ET_NET 13]
16036 ats 20 0 11.9g 7.6g 5016 S 24.0 32.5 6:28.33 [ET_NET 18]
16021 ats 20 0 11.9g 7.6g 5016 S 22.2 32.5 6:18.55 [ET_NET 3]
16017 ats 20 0 11.9g 7.6g 5016 S 20.3 32.5 6:41.56 [ET_NET 0]
16030 ats 20 0 11.9g 7.6g 5016 R 20.3 32.5 6:26.94 [ET_NET 12]
16023 ats 20 0 11.9g 7.6g 5016 S 18.5 32.5 6:21.96 [ET_NET 5]
16608 root 20 0 15344 1460 832 R 9.2 0.0 0:00.08 top
{code}
> single tcp connection will limit the cluster throughput
> -------------------------------------------------------
>
> Key: TS-1222
> URL: https://issues.apache.org/jira/browse/TS-1222
> Project: Traffic Server
> Issue Type: Improvement
> Components: Clustering
> Affects Versions: 3.1.3
> Reporter: Zhao Yongming
> Assignee: kuotai
> Fix For: 3.1.4
>
> Attachments: cluster.patch
>
>
> kuotai is trying to work around the single tcp performance issue in cluster
> throughput. hopes we can fix it before 3.2 is out, put it a target for v3.3
> for now.
> more detail, please take a look at the Clustering in projects on the cwiki.
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