[Bamboo-Users] Get time on Grid5000 cluster

[Martina.Baldanzi at isti.cnr.it]

Dear All,
I'm Martina. I have a question about running Bamboo on a cluster
(Grid'5000 https://www.grid5000.fr/mediawiki/index.php/Grid5000:Home) .
I have to realize a Resource Discovery Service using Bamboo, but first
of all, I have to measure the Get response time of Bamboo. After this
testing, I obtain strange results, or better, results that I don't
understand. I explain better the problem:
- For testing Bamboo, I use the Rennes site of Grid5000 and I have
reserved 32 nodes (32 random nodes from Rennes site).
- Starts from frontend.rennes.grid5000.fr, for each node N in 32 node
list, I open an ssh connection and N runs a Bamboo instance.
- Starts from frontend.rennes.grid5000.fr, for each node N in 32 node
list, I open an ssh connection and every node N runs only one Put to
publish its computational resource info. The key is a string (ip+port of
node N) and the value is the content of an XML file with description of
N computational resource (dim ~800 bytes)
- Starts from frontend.rennes.grid5000.fr, I choose one node X in 32 node
list and I open an ssh connection and X runs a Daemon that periodically
invokes the bamboo Get  class. The key is the string ip+port of one node
randomly choosen from 32 list node.

In the first test, the daemon invokes the get class every 11 sec, in the
second test, the daemon invokes the get class every 27 sec.

The results are (Bamboo get response time):
Period: 11000 ms
Milliseconds: 147
Milliseconds: 18
Milliseconds: 12
Milliseconds: 7
Milliseconds: 9
Milliseconds: 5012
Milliseconds: 5035
Milliseconds: 6
Milliseconds: 5
Milliseconds: 5039
Milliseconds: 10
Milliseconds: 10
Milliseconds: 2
Milliseconds: 8
Milliseconds: 5035
Milliseconds: 7
Milliseconds: 3
Milliseconds: 3
Milliseconds: 9
Milliseconds: 4
Milliseconds: 5019
Milliseconds: 4
Milliseconds: 5
Milliseconds: 3
Milliseconds: 5
Milliseconds: 5022
Milliseconds: 3
Milliseconds: 4
Milliseconds: 24
Milliseconds: 3

Period: 27000 ms
Milliseconds: 5
Milliseconds: 30
Milliseconds: 4
Milliseconds: 13
Milliseconds: 16
Milliseconds: 20
Milliseconds: 3
Milliseconds: 4
Milliseconds: 4
Milliseconds: 3
Milliseconds: 4
Milliseconds: 3
Milliseconds: 5
Milliseconds: 4
Milliseconds: 4
Milliseconds: 5007
Milliseconds: 5
Milliseconds: 3
Milliseconds: 2
Milliseconds: 10018
Milliseconds: 3
Milliseconds: 4
Milliseconds: 3
Milliseconds: 5010
Milliseconds: 5
Milliseconds: 8
Milliseconds: 5016
Milliseconds: 5013
Milliseconds: 2
Milliseconds: 3
Milliseconds: 5011

We can see that in some cases I obtain good response time 2, 3 ms, while
in other cases I obtain 5000 or 10000 ms.
Have you some ideas about these strange results?
Help me please.
Thank you very much,
Martina

ps. In the attached file there is an example of config file
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