Database migration

Following my last post, we investigated the import/export mechanism, and discovered that the database dump from Nottingham University will be easier to import into the Postgres database at the test version of DSpace 1.7.2.

After much discussion and effort we managed to get the database dump in sql format which is around 2 gb in size. Following commands were executed to load the data and then the dspace user was updated to elogeo in <user directory>/elogeodspace/config/dspace.cfg file. The Apache and tomcat were stopped and restarted.

-bash-3.2$ createuser -U zzelogeo -d -P
Enter name of role to add: elogeo
Enter password for new role:
Enter it again:
Shall the new role be a superuser? (y/n) y
-bash-3.2$ createuser -U zzelogeo -d -P postgres
Enter password for new role:
Enter it again:
Shall the new role be a superuser? (y/n) y
-bash-3.2$ createdb -E UTF8 -T template0  dspacelm

-bash-3.2$ psql dspacelm < <user directory>/db_dump/elogeodump.sql

We noticed there is a memory issue, so we ran the following command, stopped and restarted Tomcat, but it did not help much.

-bash-3.2$ JAVA_OPTS=-Xmx2048m

This is a very common Java problem of heap space and we should be able to sort this out very soon. We will keep you posted on further developments.

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2 thoughts on “Database migration

  1. We have made a number of changes to DSpace for ELOGeo since this work was done. To make certain changes DSpace has to be rebuilt and this will overwrite anything the the DSpace Build folder – listed here as “elogeodspace”. It is therefore important that changes in the build folder such as port numbers are copied back to the DSpace source so they survive a rebuild. The config file referred to here is at [DSpace source release]/dspace/config/dspace.cfg in the release folder.

  2. Pingback: Jorum and ELOGeo: a geospatial community window onto Jorum | mimasgeoknowledge

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