dCache Migration to 2.6 from 2.2

The official upgrade notes can be found on the dCache website at the link below

http://www.dcache.org/manuals/upgrade/upgrade-2.2-to-2.6.html

Config changes

dcache.conf

In the dcache.conf file there are some lines we need to add.

In dache 2.6 atime isn't recorded by default the below re-enables this

 pnfsmanager/atime.gap=1

Plots are disabled in the WebUI for dcache 2.6 by default, the below enabled them

 poolqplots.enabled=true
 webdavBasicAuthentication=true

PNFS namespace support has been dropped from 2.6 be sure the following line is removed or commented out

 #cacheInfo=pnfs

Layouts

As nfsv4 is now used in 2.6 as such we need to add "[namespaceDomain/nfsv41]" to our namespace domian, the whole thing looks like this.

[namespaceDomain]
[namespaceDomain/pnfsmanager]
[namespaceDomain/nfsv41]
[namespaceDomain/cleaner]
[namespaceDomain/acl]

Upgrade procedure

Make backups

Stop dcache

  dcache stop

Dump the db

  pg_dumpall -U postgres -c -f pgdump.16102013.sql

Stop postgres

  service postgresql stop

Backup billing info

  Note: compress the in PROD
  cp /var/lib/dcache/billing/ .

Copy backups to remote location (e.g. the NAS)

Re-install machine

Important: Ensure machine will use UMD-3 repos in cfengine when re-installed.

Install postgres 9.3

  yum remove postgresql*
  rpm -ivh http://yum.postgresql.org/9.3/redhat/rhel-6-x86_64/pgdg-sl93-9.3-1.noarch.rpm
  yum install postgresql93-server

Start the new postgres

  service service postgresql-9.3 initdb
  vim /var/lib/pgsql/9.3/data/pg_hba.conf - change auth to trust
  service service postgresql-9.3 start

Import the db

  su - postgres
  psql -f /tmp/pgdump.16102013

Ensure you are running Java 7

 java -version
 # If not
 yum install java-1.7.0-openjdk.x86_64

Install dCache

  yum localinstall http://www.dcache.org/downloads/1.9/repo/2.6/dcache-2.6.10-1.noarch.rpm

Check the config, and start dCache if all is ok

  dcache check-config
  dcache start

Additional monitoring

xrootd-monitor

Install dcache26-plugin-xrootd-monitor package form WLCG repo http://linuxsoft.cern.ch/wlcg/sl6/x86_64/ to enable CMS monitoring of xrootd door at http://xrootd.t2.ucsd.edu/display

Requires the following config to be added

 pool/xrootdPlugins=edu.uchicago.monitor
 detailed=xrootd.t2.ucsd.edu:9930:60
 summary=xrootd.t2.ucsd.edu:9931:60

Java monitoring

Explore usage of jmxquery and jmxmetric to plot Java utilization

http://code.google.com/p/jmxquery/

https://github.com/ganglia/jmxetric

-- GeorgeBrown - 2013-10-28