[Bamboo-Users] How to change Get timeout

[Martina.Baldanzi at isti.cnr.it]

Hi Olaf,
thanks for your reply

Martina

2007/12/4, Olaf Görlitz <goerlitz at uni-koblenz.de>:

    On 04.12.2007 11:13, Martina.Baldanzi at isti.cnr.it wrote:
    > Dear Olaf,
    > thanks for your reply.
    > The timeout, that you specify, is a generic timeout valid for all
ONC/RPC
    > calls.
    > I have a question, if I change the file OncRpcClient.java, I change
the
    > value of the Put method timeout too?

    From my experiences yes.
    If you have a lossy network the OncRPC connection waits for that fixed
    time before throwing the exception.
    I once altered that timeout before I realized the meaning of the
    drop_prob parameter Haijun mentioned.

    Olaf

    >
    > Martina
    >
    > 2007/12/4, Olaf Görlitz <goerlitz at uni-koblenz.de>:
    >
    >     Hi Martina,
    >
    >     In the past, I had the impression that those parameters in the
config
    >     file have no real effect. Actually, the timeout parameter is
    > hard-coded
    >     in the ONCRPC library. (http://remotetea.sourceforge.net/)
    >
    >     see also:
    >    
http://bamboo-dht.org/pipermail/bamboo-users/2006-August/000826.html
    >
    >     I'm not quite sure if this solves your problem.
    >
    >     Cheers,
    >     Olaf
    >
    >
    >     On 04.12.2007 07:33, Martina.Baldanzi at isti.cnr.it wrote:
    >     > Dear Haijun,
    >     > thanks a lot for your reply, but probably I didn't explain
clearly
    > my
    >     > problem.
    >     > Now, I'm testing Bamboo simulating an unreliable overlay
network,
    > in
    >     > particular I'm studying the behaviour of the DHT in respect
with
    > the
    >     > increase/decrease of the get timeout.
    >     >
    >     > My problem is: why I obtain get response times multiples of
5000 ms
    > when
    >     > I have set the get_timeout var in config file equal to 800 ms?
    >     >
    >     > Thank you very much,
    >     > Martina
    >     >
    >     > 2007/12/3, Haijun Cao <Haijun at projectrialto.com>:
    >     >
    >     >     Set drop_prob to 0.0 in network stage.
    >     >
    >     >     -----Original Message-----
    >     >     From: bamboo-users-bounces at bamboo-dht.org
    >     >     [mailto:bamboo-users-bounces at bamboo-dht.org] On Behalf Of
    >     >     Martina.Baldanzi at isti.cnr.it
    >     >     Sent: Monday, December 03, 2007 9:23 AM
    >     >     To: bamboo-users at bamboo-dht.org
    >     >     Cc: martina.baldanzi at isti.cnr.it
    >     >     Subject: [Bamboo-Users] How to change Get timeout
    >     >
    >     >     Dear All,
    >     >     I'm Martina and I have a question about the get timeout.
    >     >     As default value, the get_timeout variable is set to 5000
ms,
    > but if I
    >     >     change the config file of a Bamboo node, I can give a
different
    > value
    >     > to
    >     >     this timeout (such as 800 ms).
    >     >
    >     >     Suppose that I want to change the get_timeout of
    >     >     bamboo/test/location-test-node.cfg in this way:
    >     >
    >     >     ...
    >     >
    >     >     <Dht>
    >     >                 class bamboo.dht.Dht
    >     >                 <initargs>
    >     >                     get_timeout 800
    >     >                     debug_level 1
    >     >                     storage_manager_stage StorageManager
    >     >                     min_replica_count     1
    >     >                 </initargs>
    >     >             </Dht>
    >     >
    >     >     ..
    >     >
    >     >     Now I run the test to start two Bamboo instances and I
run a
    > sequence
    >     > of
    >     >     Get requests to measure the response time. Sometimes, I
obtain
    > get
    >     >     resolved in tens of milliseconds and sometimes I obtain
get
    > resolved
    >     >     with a time equal to 5000 ms.
    >     >
    >     >     This is ok for me, because the network is reliable at the
90%,
    > but I
    >     >     expected get response time multiple of 800 ms.
    >     >
    >     >     Moreover, I have tried to change the line 1075 of
    >     >     bamboo/src/bamboo/dht/Dht.java with the following:
    >     >
    >     >     get_timeout = configGetInt(config, "get_timeout", 800);
    >     >
    >     >     and then I re-compile the bamboo source code, but I
obtain get
    >     > response
    >     >     time multiple of 5000 ms.
    >     >
    >     >     Any ideas to resolve my problem?
    >     >     Thank you very much,
    >     >     Martina
    >     >     _______________________________________________
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    >
    >     --
    >    
----------------------------------------------------------------------
    >     Olaf Görlitz                                  
goerlitz at uni-koblenz.de
    >     University of Koblenz                          tel:   +49 261
287-2617
    >     Institute for Computer Science                 fax:   +49 261
287-2721
    >     Information Systems and Semantic Web          
isweb.uni-koblenz.de
    >    
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