Keep » History » Version 1
Tom Clegg, 04/10/2013 04:23 PM
| 1 | 1 | Tom Clegg | h1. Keep |
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| 3 | The Keep storage system consists of data block read/write services, SDKs, and management agents. |
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| 5 | The responsibilities of the Keep service are: |
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| 7 | * Write data blocks |
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| 8 | * When writing: ensure data integrity by comparing client-supplied MD5 digest to client-supplied data |
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| 9 | * Read data blocks (subject to permission, which is determined by the system/metadata DB) |
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| 10 | * Send read/write/error event logs to management agents |
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| 12 | The responsibilities of the SDK are: |
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| 14 | * When writing: split data into ≤64 MiB chunks |
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| 15 | * When writing: encode directory trees as manifests |
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| 16 | * When writing: write data to the desired number of nodes to achieve storage redundancy |
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| 17 | * After writing: register a collection with Arvados |
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| 18 | * When reading: parse manifests |
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| 19 | * When reading: verify data integrity by comparing locator to MD5 digest of retrieved data |