NOTICE: FULL O2 Cluster Outage, January 3 - January 10th

O2 will be completely offline for a planned HMS IT data center relocation from Friday, Jan 3, 6:00 PM, through Friday, Jan 10

  • on Jan 3 (5:30-6:00 PM): O2 login access will be turned off.
  • on Jan 3 (6:00 PM): O2 systems will start being powered off.

This project will relocate existing services, consolidate servers, reduce power consumption, and decommission outdated hardware to improve efficiency, enhance resiliency, and lower costs.

Specifically:

  • The O2 Cluster will be completely offline, including O2 Portal.
  • All data on O2 will be inaccessible.
  • Any jobs still pending when the outage begins will need to be resubmitted after O2 is back online.
  • Websites on O2 will be completely offline, including all web content.

More details at: https://harvardmed.atlassian.net/l/cp/1BVpyGqm & https://it.hms.harvard.edu/news/upcoming-data-center-relocation

Personal Perl Packages

Owned by Former user (Deleted)
Last updated: May 06, 2021 by Neil Coplan
2 min read

 

The local::lib Perl module lets you install packages in a dedicated location under your home directory, so that you don't need permission to install in the O2-wide directories in /n/app or /usr. On this page, we use the naming convention of perl5-O2 for the personal Perl package directory, though you can name it whatever you like. We use the perl/5.30.0 module for setting up local::lib in the instructions below, but it will also work with other available Perl modules on O2.

Turning on local::lib

You can set up local::lib so that each time you login, you'll be using a relatively modern version of Perl and local::lib. That way, the modules you install in your local perl5-O2 directory today will be available next time you login.

The following three commands will modify your .bashrc file to always look in your local directory first for Perl packages:

echo 'module load gcc/6.2.0' >> ~/.bashrc echo 'module load perl/5.30.0' >> ~/.bashrc echo '[ $SHLVL -eq 1 ] && eval $(perl -I$HOME/perl5-O2/lib/perl5 -Mlocal::lib=~/perl5-O2)' >> ~/.bashrc

The above commands need to be done only once ever.



Alternatively, you can start up local::lib manually whenever you want (once per login), to install new packages in your local perl5-O2 directory, or to use packages in that directory:

module load gcc/6.2.0 module load perl/5.30.0 eval `perl -Mlocal::lib=~/perl5-O2`

Using local::lib

That's it! Once you've turned it on, installing Perl modules with tools like cpan or cpanm will automatically install them to your local perl5-O2 directory. To make modules that you installed to your local library available within a Perl script, add a use statement to the top of your script:

#!/usr/bin/env perl use Nameofmodule; # rest of code goes here





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