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From Vineet Mishra <clearmido...@gmail.com>
Subject Re: Discrepancy in Storm while Job Distribution on available nodes
Date Wed, 25 Feb 2015 15:36:58 GMT
If I am taking you right, by adding more workers you mean adding more nodes
to the existing cluster or/and enhancing the existing configuration with
perhaps 8 or 16 core cpu?

On Wed, Feb 25, 2015 at 6:59 PM, Nathan Leung <ncleung@gmail.com> wrote:

> 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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