EPrints Technical Mailing List Archive

See the EPrints wiki for instructions on how to join this mailing list and related information.

Message: #03308

< Previous (by date) | Next (by date) > | < Previous (in thread) | Next (in thread) > | Messages - Most Recent First | Threads - Most Recent First

[EP-tech] Re: Adding fields to a live system - any data integrity concerns?

Il 21/07/2014 09:51, Andrew Beeken ha scritto:

Okay, so I take it when Apache is stopped you can still run Perl scripts
on the server (epadmin etcŠ)?


sure, because it uses the perl libraries directly and not apache.



On 18/07/2014 16:57, "Sebastien Francois" <sf2@ecs.soton.ac.uk> wrote:


Also stop the indexer when you stop apache and restart the indexer when
you restart apache.

Seb.

On 18/07/14 16:49, Jan Ploski wrote:

If you want to do it as a hotfix, the proper procedure would be to
1. Add expected columns and indexes to database tables
2. Add the field definition (which depends on 1)
3. (optional) Run whatever initialization scripts you need to run for
the field
4. apachectl graceful

Unfortunately, EPrints tools assume that you add the field definition
first and that they then update the database for you. This leaves a
window of inconsistency during which your users will get errors.

Obviously, if you don't mind a short service interruption, it's not a
concern and you can do it "offline" during a maintenance window:
1. apachectl stop
2. Add field definition
3. Use epadmin to update database
4. (optional) Run whatever initialization scripts you need to run for
the field
5. apachectl start


*** Options: http://mailman.ecs.soton.ac.uk/mailman/listinfo/eprints-tech
*** Archive: http://www.eprints.org/tech.php/
*** EPrints community wiki: http://wiki.eprints.org/
*** EPrints developers Forum: http://forum.eprints.org/


The University of Lincoln, located in the heart of the city of Lincoln, has established an international reputation based on high student satisfaction, excellent graduate employment and world-class research.

The information in this e-mail and any attachments may be confidential. If you have received this email in error please notify the sender immediately and remove it from your system. Do not disclose the contents to another person or take copies.

Email is not secure and may contain viruses. The University of Lincoln makes every effort to ensure email is sent without viruses, but cannot guarantee this and recommends recipients take appropriate precautions.

The University may monitor email traffic data and content in accordance with its policies and English law. Further information can be found at: http://www.lincoln.ac.uk/legal.

*** Options: http://mailman.ecs.soton.ac.uk/mailman/listinfo/eprints-tech
*** Archive: http://www.eprints.org/tech.php/
*** EPrints community wiki: http://wiki.eprints.org/
*** EPrints developers Forum: http://forum.eprints.org/