Keep-balance » History » Version 2

Tom Clegg, 04/17/2013 12:58 AM

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h1. Data Manager
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The Data Manager enforces policies concerning data access and storage resource consumption.
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Its responsibilities include:
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* Granting access to data blocks (according to permissions found in the system/metadata DB)
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* Monitoring and adjusting redundancy of valuable data blocks (according to targets found in system/metadata DB)
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* Deleting unneeded data blocks to increase disk space
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* Rebalancing data blocks among available disks
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* Monitoring block read and write activity
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* Monitoring free disk space
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* Monitoring disk activity
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* Monitoring disk performance and health (via SMART and empirical measurement)
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* Tracking physical disk changes (disks added, removed, moved)
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* Collecting per-user, per-group, per-node, and per-disk usage statistics