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Am I correct of storing JSON data in HBase?
put 'messages', 123, 'cf:json', '{"foo":"bar"}'
Basically, I need to query it by ID, which is 123 in my example. And JSON is variable length string.
There’s no problem storing JSON in a cell value. Cell sizes of up to 5M are still reasonable. Generally speaking though it is recommended to keep key and column sizes small (http://hbase.apache.org/book.html#keysize) and JSON, while being more compact than XML, is still a wasteful format (vs. binary JSON, Thrift, Avro, MessagePack etc.). if you stay with JSON you might need to consider making the column family compressed