Grid Resource Allocation Management

The GRAM protocol allows programs to be started on remote resources, even if different.
The Resource Specification Language (RSL) communicates requirements. RSL is similar to LDAP filters:
```
    & (executable=myprog)
          (| (&(count=5)(memory >= 74))
             (&(count=10)(memory >= 32)))
```
Create 5 instances of myprog on a machine that has at least 64MB memory or 10 instances on a machine with at least 32MB.
We can also specify multiple resource needs:
```
     + (&(count=5)(memory>=64)
             (executable=p1))
       (&(network=atm)(executable=p2))
```
Execute 5 instances of p1 on a machine with 64MB or more, and execute p2 on a machine with an ATM connection.
To submit the programs you use the commands:
- globus-job-run: interactive jobs.
- globus-job-submit: batch/offline jobs.
- globusrun: flexible scripting infrastructure.
GRAM-1 used HTTP-based RPC: request that a job be started/stopped. Returns a job contract.
GRAM-2 uses SOAP.