Keep-balance » History » Revision 2
Revision 1 (Tom Clegg, 04/10/2013 02:57 PM) → Revision 2/7 (Tom Clegg, 04/17/2013 12:58 AM)
h1. Data Manager The Data Manager enforces policies concerning data access and storage resource consumption. Its responsibilities include: * Granting access to data blocks (according to permissions found in the system/metadata DB) * Monitoring and adjusting redundancy of valuable data blocks (according to targets found in system/metadata DB) * Deleting unneeded data blocks to increase disk space * Rebalancing data blocks among available disks * Monitoring block read and write activity * Monitoring free disk space * Monitoring disk activity * Monitoring disk performance and health (via SMART and empirical measurement) * Tracking physical disk changes (disks added, removed, moved) * Collecting per-user, per-group, per-node, and per-disk usage statistics