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From Nathan Leung <ncle...@gmail.com>
Subject Re: Discrepancy in Storm while Job Distribution on available nodes
Date Wed, 25 Feb 2015 13:29:16 GMT
In practice it's very difficult to fully maximize cpu usage, especially
when each thread has to do things like wait for i/o in any way (network,
disk, etc).  Since you're cpu limited, or very close to it, you should try
adding more workers.
On Feb 25, 2015 7:48 AM, "Vineet Mishra" <clearmidoubt@gmail.com> wrote:

> Hi Nathan,
>
> You are right, I guess that was the case.
>
> But I am not sure why even after increasing the spouts to 20 I couldn't
> end up with max throughput, I hold 4 core Xeon processor Intel(R) Xeon(R)
> CPU E5-2680 v2 @ 2.80GHz, although I could see the high CPU utilization
> reaching more than 350% but is it the only reason behind the less
> performance gain than expected or do I need to add some configuration
> tuning.
>
> Thanks!
>
> On Wed, Feb 25, 2015 at 5:53 PM, Nathan Leung <ncleung@gmail.com> wrote:
>
>> It looks like you configured your topology to only use one worker process.
>>
>> On Wed, Feb 25, 2015 at 6:39 AM, Vineet Mishra <clearmidoubt@gmail.com>
>> wrote:
>>
>>> Hi All,
>>>
>>> I am running a 3 node storm cluster with a Topology which is subscribed
>>> to Kafka using Kafka-Storm Spout.
>>>
>>> The Cluster is hosting Nimbus on a node and left with 2 other nodes for
>>> the workers and supervisor to function.
>>>
>>> While running the Topology I could see that all the spouts(20) and
>>> bolts(5) tasks are running on the same machine leaving the other node
>>> instance without any CPU utilization.
>>>
>>>   [1-1] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 2264180 2264180
>>> 11.519 2262620 0  [2-2] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 841540 841540 19.717
>>> 840940 0  [3-3] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 1080080 1080080
>>> 18.105 1079240 0  [4-4] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 1113900 1113900
>>> 17.966 1105320 0  [5-5] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 854220 854220 19.342
>>> 856240 0  [6-6] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 1249640 1249640
>>> 17.071 1251320 0  [7-7] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 2266520 2266520
>>> 11.63 2267260 0  [8-8] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 629760 629760 20.8
>>> 629120 0  [9-9] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 854360 854360 19.513
>>> 851800 0  [10-10] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 1417380 1417380
>>> 15.78 1418200 0  [11-11] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 858620 858620 20.897
>>> 858180 0  [12-12] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 1242980 1242980
>>> 16.766 1241100 0  [13-13] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 352300 352300 19.975
>>> 349420 0  [14-14] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 627920 627920 20.329
>>> 625440 0  [15-15] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 1061880 1061880
>>> 18.263 1061300 0  [16-16] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 706480 706480 20.297
>>> 702720 0  [17-17] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 1518800 1518800
>>> 15.154 1514640 0  [18-18] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 622640 622640 20.743
>>> 626240 0  [19-19] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 3376960 3376960
>>> 8.361 3377060 0  [20-20] 31m 7s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 1044940 1044940
>>> 18.569 1043760 0
>>>
>>> Same is the case for bolts,
>>>
>>>   [22-22]} 32m 13s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 0 0 0.002 0.05
>>> 1376560 0.042 1376540 0  [23-23]} 32m 13s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 0 0 0.001 0.021
>>> 347180 0.02 347180 0  [24-24]} 32m 13s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 0 0 0 0.023 34600
>>> 0.023 34600 0  [25-25]} 32m 13s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 0 0 0 0.017 8380
>>> 0.014 8380 0  [26-26]} 32m 13s ip-20-0-0-75 6703
>>> <http://ip-20-0-0-75:8000/log?file=worker-6703.log> 0 0 0.082 0.039
>>> 22217940 0.041 22217920 0
>>>
>>> ip-20-0-0-75 is only utilized while their is another host which is not
>>> utilized at all. Please find the supervisor summary below
>>>
>>>   8e550ab9-9e0d-48a7-8899-0963d5f00a41 ip-20-0-0-78 1d 5h 7m 32s 4 0
>>> 9d98d0b4-1bb4-42e9-9a72-a67b82c64b2c ip-20-0-0-75 5d 23h 57m 53s 4 1
>>> This is not the regular behavior of Storm as I have seen both the nodes
>>> operating while running the jobs, but how we can comment on the stability
>>> of the storm with this kind off behavior.
>>>
>>> Urgent Issue, Request for expert intervention.
>>>
>>> Thanks!
>>>
>>
>>
>

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