[Spread-users] groups and daemons

[Jonathan Stanton]

The flow control parameters can be set dynamically by using the sp monitor program in Spread. This can let you experiment with different values without you having to recompile the daemon.

Cheers,
Jonathan

Sent from my iPhone

On Nov 22, 2011, at 6:10 PM, John Schultz <jschultz at spreadconcepts.com> wrote:

> At the moment, I do not believe these parameters are exposed through the configuration file.
> 
> Cheers!
> 
> -----
> John Lane Schultz
> Spread Concepts LLC
> Phn: 301 830 8100
> Cell: 443 838 2200
> 
> On Nov 22, 2011, at 4:46 PM, Ed Holyat wrote:
> 
> Can this be adjusted through the spread configuration file (.conf)?
> 
> -----Original Message-----
> From: Parisa [mailto:jalilimp at usi.ch] 
> Sent: Tuesday, November 22, 2011 4:29 PM
> To: John Schultz
> Cc: spread-users at lists.spread.org
> Subject: Re: [Spread-users] groups and daemons
> 
> Thanks, looks as if it is the solution :)
> I can push the throughout further now.
> 
> P.
> 
> 
> 
> On Nov 22, 2011, at 9:59 PM, John Schultz wrote:
> 
>> I'm not sure what the bottleneck here is.
>> 
>> It could be the flow control parameters of your configuration are  
>> too low to hit cpu and/or bandwidth limits.  You can change the flow  
>> control parameters manually through the spmonitor program if you  
>> have dangerous monitor turned on in your configuration file.  Out of  
>> the box the window is 60 and the personal window is 15.  You could  
>> try experimentally increasing these parameters by a multiplicative  
>> factor and see if it improves your throughput (e.g. - 120 and 30).
>> 
>> Cheers!
>> 
>> -----
>> John Lane Schultz
>> Spread Concepts LLC
>> Phn: 301 830 8100
>> Cell: 443 838 2200
>> 
>> On Nov 22, 2011, at 3:39 PM, Parisa wrote:
>> 
>> Hi ,
>> 
>> I was testing the spread with the following setting:
>> 
>> one segment with 4 daemons. which are deployed on 4 different  
>> machines.
>> then each daemon has two flooders connected to it. one is a writer and
>> the other is a reader. these flooders are also on different machines.
>> 
>> Then I have 4 groups. each pair of the flooders connected to that same
>> daemon, form a group. Each writer only sends to its own group.
>> 
>> and I am testing with SAFE_MESS type.
>> 
>> The behavior I am observing looks a little strange to me. I am
>> monitoring the cpu and bandwidth usage at the daemons during the
>> execution. After a certain load which is close to 50 Mbps for each
>> writer (which in aggregate we can say 200 Mbps) throughput does not
>> increase any further. Though neither cpu nor the bandwidth at daemons
>> and flooders is not saturated.
>> 
>> 
>> Do you think I am doing sth wrong? Any suggestions why this should be
>> the case?
>> Thanks.
>> 
>> 
>> 
>> Parisa
>> 
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> 
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