Temporary Removal

To remove a pool temporarily (will be back in a couple of hours), do the following:

• Touch /etc/stop_replicas on the dcache-head.unl.edu.  This is like /etc/nologin, except for the dCache PFM which controls the replication.  This will avoid massive replication of the node's old files.
• Shut down dCache on the pool with /opt/d-cache/bin/dcache-pool stop.
• Turn off the pool.

After the pool is ready to go back online, all you have to do is remove the /etc/stop_replicas file.

Permanent Removal

This is an operation I'll eventually create a specialized tool for.  Until then, do the following:

1. Look at the last entries for zero replica files in /home/brian/projects/dCacheNebraska/scripts/zerorep_logfile.
2. Add the pool name to the blacklist  in /home/brian/projects/dCacheNebraska/scripts/pfm_config.
3. Run dcache_pfm.py manually or let it run automatically over the course of a couple hours.
4. Repeat step (3) until the list of zero replicas that dcache_pfm.py outputs is the same as it was in (1).
   

The whole point of having a PFM is that we can lose any pool at any time, so technically none of these steps are necessary (but who's going to trust a computer to do something right?).  Make sure that any files you don't want to lose are, for now, protected by the PFM by having multiple replicas.