What is SAM?
Sam is a file based data management and access layer between the Storage
Management System and the data processing layers.
The goal of this SAM is to optimize the use of data storage and delivery
resources, such as tape mounts, drive usage, and network bandwidth. In
order to facilitate this goal, the primary objectives are:
In addition, it is desired to unload the burden of individual file tracking
from the analysis physicists, and place it onto the data management system.
This is an added bonus integrated into the SAM system.
- Clustering the data onto tertiary storage in a manner corresponding
to access patterns
- Caching frequently accessed data on disk or tape
- Organizing data requests to minimize tape mounts
- Estimating the resources required for file requests before they are
submitted and, with this information, making administrative decisions
concerning data delivery priority.
$Author: bellavan $
$Revision: 1.3 $
Last modified: Fri Jan 14 1999