[padb-users] configuration file format.

[Ashley Pittman]

On 23 Nov 2010, at 20:32, Ashley Pittman wrote:
> On 23 Nov 2010, at 15:38, Daniel Kidger wrote:
>> and how does it compare / contrast with LLNL's pdsh ? perhaps on extreme scalability?
> 
> Mainly the scalability I believe, pdsh has a "sliding window" of hosts it targets at any one time and as one completes it moves onto the next, the size of this window is the "fanout" parameter.  This worked well for padb in the 2.x days but now there is full-duplex communication between the inner and outer processes all inner processes have to run simultaneously.

> I'm told that clustershell works by calling itself recursively on remote nodes so can scale to much larger hostcounts and still run all commands simultaneously.

I've added support for clush to padb in r421, it doesn't seem any different in design to pdsh so probably has the same scalability limits and performance characteristics.   

Ashley,

-- 

Ashley Pittman, Bath, UK.

Padb - A parallel job inspection tool for cluster computing
http://padb.pittman.org.uk