cndaimin opened a new pull request #4104: URL: https://github.com/apache/hadoop/pull/4104
HDFS client 'pread' represents 'position read', this kind of read just need a range of data instead of reading the whole file/block. By using BlockReaderFactory#setLength, client tells datanode the block length to be read from disk and sent to client. To EC file, the block length to read is not well set, by default using 'block.getBlockSize() - offsetInBlock' to both pread and sread. Thus datanode read much more data and send to client, and abort when client closes connection. There is a lot waste of resource to this situation. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
