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hbase [2015/08/18 10:03] steve |
hbase [2016/07/01 12:35] steve |
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| * [[Hadoop]] | * [[Hadoop]] | ||
| + | * [[hdfs]] | ||
| * [[https://hbase.apache.org/book.html|Apache HBase Reference Guide]] | * [[https://hbase.apache.org/book.html|Apache HBase Reference Guide]] | ||
| Line 61: | Line 62: | ||
| ==== hbase backups ==== | ==== hbase backups ==== | ||
| + | |||
| + | ** Exporting a table ** | ||
| + | |||
| + | From the docs: "Export is a utility that will dump the contents of table to HDFS in a sequence file." [[http://hbase.apache.org/book.html#_export|Source]] | ||
| + | |||
| + | <code> | ||
| + | hbase org.apache.hadoop.hbase.mapreduce.Export <tablename> <outputdir> [<versions> [<starttime> [<endtime>]]] | ||
| + | </code> | ||
| + | |||
| + | For example, exporting table ''table_name'': | ||
| + | |||
| + | <code> | ||
| + | hbase org.apache.hadoop.hbase.mapreduce.Export table_name /tmp/table_name | ||
| + | </code> | ||
| + | |||
| + | ** Importing a table: ** | ||
| + | |||
| + | From the docs: "Import is a utility that will load data that has been exported back into HBase." [[http://hbase.apache.org/book.html#_import|Source]] | ||
| + | |||
| + | <code> | ||
| + | hbase -Dhbase.import.version=0.94 org.apache.hadoop.hbase.mapreduce.Import <tablename> <inputdir> | ||
| + | </code> | ||
| ==== TTL ==== | ==== TTL ==== | ||
| Line 69: | Line 92: | ||
| <code> | <code> | ||
| - | alter 'table', { TTL = 604800 } | + | alter 'table', { TTL => 604800 } |
| major_compact 'table' | major_compact 'table' | ||
| </code> | </code> | ||
