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| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
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| # to you under the Apache License, Version 2.0 (the |
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| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
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| |
| HDFS Snapshot Mirroring Extension. |
| |
| Overview |
| This extension implements replication for snapshot-able directories on HDFS from one |
| Hadoop cluster to another. This piggybacks on snapshot solution supported in HDFS (HDFS-7535). |
| It also performs retention on the snapshots generated in source and target. |
| |
| Use Case |
| * Create snapshots in source directory |
| * Copy this directory between HDFS clusters |
| * Create snapshot in target directory |
| * Handle snapshot retention in source and target directories |
| |
| Limitations |
| If TDE encryption is enabled, this snapshot based replication is not efficient. |
