[clug] Basic work queue

Adam Thomas adam.lloyd at gmail.com
Sat Jun 18 03:53:05 MDT 2011

On 18 June 2011 17:19, Carlo Hamalainen <carlo.hamalainen at gmail.com> wrote:
> Hi,
> I have a long computation that I would like to run on Amazon EC2. I
> want to manually start up a few high-CPU instances (say 5 or 10) and
> have each instance request a task from some master instance, do the
> task, signal completion to the master, and then get the next available
> task.
> The problem is "embarrassingly parallel":
> * The master only needs to send a 100 line shell script to an instance
> to get it running on a new task.
> * No instances need to communicate with each other.
> What is the simplest way to make such a work queue?

I think gearman[0] might do what you're looking for. I've played with
it a bit and generally find it very easy to setup and get going.

[0]: http://gearman.org/

> I did look at Amazon SQS [1] but it says that the queue messages can
> live for only up to 14 days, but my queue might last for a month or
> more, depending on how many worker instances I have running.
> Is something like RabbitMQ suitable?
> Would it be easier to set up PBS and use my Linode as the master?
> [1] http://aws.amazon.com/sqs/
> --
> Carlo Hamalainen
> http://carlo-hamalainen.net
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