Thank you Julian, my question is answered. regards, Lin
On Thu, Sep 6, 2012 at 6:03 AM, Julian Wissmann <[email protected]>wrote: > They do the exact same thing. In fact the non-KV add looks like this: > > public Put add(byte [] family, byte [] qualifier, long ts, byte [] value) { > > List<KeyValue> list = getKeyValueList(family); > > KeyValue kv = createPutKeyValue(family, qualifier, ts, value); > > list.add(kv); > > familyMap.put(kv.getFamily(), list); > > return this; > > } > > So there is a KeyValue created within the method. > > There are use cases, where either one is easier to use to achieve things. > > Cheers > > Julian > > 2012/9/2 Lin Ma <[email protected]> > > > Hello HBase masters, > > > > For the two add methods of Put class, > > > > > > > http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/Put.html#add%28org.apache.hadoop.hbase.KeyValue%29 > > > > > > > http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/Put.html#add%28byte[],%20byte[],%20long,%20byte[]%29 > > > > I think they are both write to a cell in HBase by row-key, column family > > name, column name and time stamp. I have not found any special functions > > provided by the KeyValue based method compared to the other one. Any > > comments about special function which KeyValue based method could > achieve? > > > > regards, > > Lin > > >
