You are viewing a plain text version of this content. The canonical link for it is here.

Posted to common-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2011/07/06 06:42:16 UTC

[jira] [Created] (HADOOP-7444) Add Checksum API to verify and calculate checksums "in bulk"

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