Storage Upgrade

Pools

To change our pools to a 64 bits node host, important directories:

• The pool directory. It contains a control/ directory with meta data, a data/ directory with data, a one or more setup files.
• An entry in the pool_name_n.poollist (i.e. spraid02.poollist) file stored in the config/ directory of the dCache installation. This entry contains the path to the pool directory, the name of the pool and various settings.

Follow these steps to move a pool. Let's assume you move pool POOL_1 from SOURCE to DEST. SOURCE and DEST may

• Make sure the pool is shut down /opt/d-cache/bin/dcache stop.
• Copy the directory containing POOL_1 from SOURCE to DEST (take care not to overwrite files at DEST).
• Copy the SOURCE.poollist file from SOURCE to DEST (you can add more pools in this same file)
• Restart the pools at DEST

Important: Do not start the pool at SOURCE after you moved the files.

• Another possibility is using dcache CopyManager to just copy POOL_1 from SOURCE to DEST.

Admin

It means that we want to migrate our PNFs to a different host, so we need to export our database. In our SOURCE admin it is done like a

/opt/d-cache/bin/dcache stop
/opt/pnfs/bin/pnfs stop
pg_dump -U pnfsserver admin >admin.dump 
pg_dump -U pnfsserver data1 >data1.dump

dropdb -U pnfsserver admin
dropdb -U pnfsserver data1
createdb -U postgres admin
createdb -U postgres data1
psql -U postgres admin
and restart your pnfs system.

  * May be consider change to a Chimera , following these instructions
http://trac.dcache.org/projects/dcache/wiki/pnfsDump2MigratePnfs2Chimera


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-- MarcoAndreFerreiraDias - 23 Feb 2009