[ogsa-wg] clarification on the OGSA Job Management capability

[Hiro Kishimoto]

Hi Sergio,

We think Job Manager provides more features than BES including:
- Resource allocation (a.k.a. brokering)
- Workload management
- Reservation (including advance reservation)
- On demand application provisioning
- On demand data provisioning (more than file staging/de-staging)
- On demand container provisioning

Our EMS scenario document (working draft) gives you more concrete
ideas.

https://forge.gridforum.org/sf/go/doc12749

Hope it helps,
----
Hiro Kishimoto

Sergio Andreozzi wrote:
> Dear OGSA-WG,
> 
> as part of the OMII-Europe project, I'm performing a decomposition of 
> the functionalities provided by a number of Grid middlewares related to 
> our project following the capabilities identified in the OGSA 1.5 document.
> 
> A problem I'm dealing with is about the Job Management service. For 
> instance, in the gLite middleware, there are two main categories of 
> services providing job management capability:
> 
> 1. the Computing Element, that is an abstraction of a batch system 
> exposing an interface to let other services to submit and manage a job; 
> in the near future this component will adopt the OGSA-BES interface, but 
> at the moment it is present in different flavours (GT 2 GRAM, g-Lite CE 
> and CREAM)
> 
> 2. the Workload Management System (WMS), that is a meta-scheduler and 
> exposes an interface to let other services to submit and manages a job 
> (or collection of jobs or DAGs); the WMS not only does Job Management, 
> but also Execution and Planning, and Candidate Set Generator.
> 
> My doubt is the following: from the viewpoint of Job Management, are a 
> meta-scheduler and a computing service semantically different or identical?
> 
> If they are identical, is it expected that in a medium future, the BES 
> interface could be extendend to support the number of job types handled 
> by a meta-scheduler, hence the meta-scheduler will expose the same 
> interface of a computing service?
> 
> If they are not identical, what are the differences?
> 
> Thanks in advance for your comments,
> 
> 
> Sergio Andreozzi
> 
> 
>