hbase-6081. adding section in Compression appendix about changing compression codecs.
git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1342084 13f79535-47bb-0310-9956-ffa450edef68
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@ -2820,7 +2820,14 @@ hbase> describe 't1'</programlisting>
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</para>
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</section>
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<section xml:id="changing.compression">
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<title>Changing Compression Schemes</title>
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<para>A frequent question on the dist-list is how to change compression schemes for ColumnFamilies. This is actually quite simple,
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and can be done via an alter command. Because the compression scheme is encoded at the block-level in StoreFiles, the table does
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<emphasis>not</emphasis> need to be re-created and the data does <emphasis>not</emphasis> copied somewhere else. Just make sure
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the old codec is still available until you are sure that all of the old StoreFiles have been compacted.
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</para>
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</section>
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</appendix>
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<appendix>
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