Please note: CE
= Job execution and legacy storage, SE
= SRM based storage if applicable, ALL
= Overall result, e.g., including a successful run of VO application.
What's New In the 0.6.0 Release of the OSG Stack
This release, based on VDT 1.6.1
, has added Gratia
to enhance monitoring and to allow information on clusters on the open science grid to be more easily obtained. As a result, clusters using the OSG 0.6.0 release will report information on the cluster to a BDII
server run by the grid operations center which will provide a central server which will collect and allow this information to be obtained easily. Cluster information is also reported to a Resource Selection Service operated by Fermilab, which present cluster information in Condor ClassAd
format. This information is collected by Generic Information Providers (GIPs
). Clusters will also report basic accounting information to a Gratia server at Fermilab
which will analyze this and provide statistics on grid and cluster usage by various VOs. Gratia provides probes for Condor, PBS, LSF and SGE job schedulers.
In this release we have tested the SRM/dCache storage element based on the VDT distribution
of dCache 1.7.0 (www.dcache.org). This OSG configurion script handles publication of deployed SE's into the OSG information system.
A new script called
has been introduced in this installation that allows for better control of the services installed in this release. After installing and configuring this release, the installed services will not be running. Admins will need to run
to switch on the services and install the crontab entries needed. Conversely, running
will switch off running services and remove crontab entries. The
script also allows individual components to be switched on and off. Using the
script allows admins to turn all the osg components to be switched on or off by a single command.
Included in this release is an installation of web-services GRAM
from GT4. Instructions for installation of this gatekeeper and making it available alongside the old pre-web services GT2 GRAM is available. It is suggested that administrators make these web service gateways available to gain experience operating them as pre-web services GRAM will likely be deprecated before OSG 1.0. There are additionally some application VOs that have migrated their application frameworks to WS-GRAM.
A new file has been added to the monitoring directory to support site specific modifications that may be needed. A file called
is now created and can be used to set environment variables that should appear in the job environment. This file is preserved by the configuration scripts and should be used to store any site specific variables that are needed rather than using the osg-attributes file.
When installing this release, setting an environment variable called
which points to a previous OSG installation will allow the configuration scripts to use the configuration from that installation when configuring this installation. Although not all of the old configuration may be picked up, most of the configuration values should be obtained making the installation and configuration easier.
Several software packages that were previously distributed with the OSG software is no longer being distributed or has been deprecated. GRIS/ldap and MIS-CI have both been removed since they have been superceded by other software or are no longer required. GRIS is still available but may be dropped entirely in a future release.
Aside from the previously mentioned Gratia, a few new packages are now available in the pacman cache for the 0.6.0 release. Squid
, a web caching/proxy server, is now distributed and can be setup in the initial configuration process. Also the OSG-VO-Map
package has been added and now automatically updates the
file, doing away with the need to manually maintain this file. Curl is now also included in the worker node package.
There have been a large number of bugfixes and upgrades incorporated into this release. Among the notable changes are a bugfix to Globus that fixes installations on 64-bit platforms. Previous installations may have incorrectly installed 32bit flavors on those platforms. CRL updates are now being updated using a cron job instead of instead of being being updated by a daemon. Finally, Globus should have better support for SGE.
This release of the OSG software is based on a new release of VDT that has added support for more modern platforms such as Scientific Linux 4 (x86, x86-64, and IA-64). Therefore installations on more platforms should be successful without having to use the pretend platform option. However due to age or significant stability issues, support for Redhat 7, Redhat 9 and 32bit installations on IA-64 platforms has been dropped.
- 04 Mar 2007