Hi, I have a sequence file written by SequenceFileOutputFormat with key/value type of <Text, BytesWritable>, like below:
Text BytesWritable ------------------------------------------------------------- id_A_01 7F2B3C687F2B3C687F2B3C68 id_A_02 2F2B3C687F2B3C687F2B3C686AB23C68D73C68D7 id_A_03 5F2B3C68D77F2B3C687F2B3A ... id_B_01 1AB23C68D73C68D76AB23C68D73C68D7 id_B_02 5AB23C68D73C68D76AB68D76A1 id_B_03 F2B23C68D7B23C68D7B23C68D7 If I want all the records with the same key prefix to be processed by a same mapper, say records with key id_A_XX are processed by a mapper and records with key id_B_XX are processed by another mapper, what should I do? Should I implement our own InputFormat inherited from SequenceFileInputFormat ? Any help would be appreciated. -- YANG, Lin
