Add Checksum API to verify and calculate checksums "in bulk"
------------------------------------------------------------
Key: HADOOP-7444
URL: https://issues.apache.org/jira/browse/HADOOP-7444
Project: Hadoop Common
Issue Type: Improvement
Reporter: Todd Lipcon
Currently, the various checksum types only provide the capability to calculate
the checksum of a range of a byte array. For HDFS-2080, it's advantageous to
provide an API that, given a buffer with some number of "checksum chunks", can
either calculate or verify the checksums of all of the chunks. For example,
given a 4KB buffer and a 512-byte chunk size, it would calculate or verify 8
CRC32s in one call.
This allows efficient JNI-based checksum implementations since the cost of
crossing the JNI boundary is amortized across many computations.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
