Zhe Zhang created HDFS-7354: ------------------------------- Summary: Support parity blocks in block management Key: HDFS-7354 URL: https://issues.apache.org/jira/browse/HDFS-7354 Project: Hadoop HDFS Issue Type: Sub-task Reporter: Zhe Zhang Assignee: Zhe Zhang
In the current block management system, each block is associated with a file. "Orphan" blocks are considered corrupt and will be removed. In this JIRA we extend {{Block}} with a binary flag denoting whether it is a parity block ({{isParity}}). Parity blocks are created, stored, and reported the same way as raw ones. They have regular block IDs which are unrelated to those of the raw blocks in the same group; their replicas (normally only 1) are stored in RBW and finalized directories on the DataNode depending on the stage; they are also included in block reports. The only distinction of a parity block is the lack of file affiliation. The block management system will be aware of parity blocks and will _not_ try to remove them. -- This message was sent by Atlassian JIRA (v6.3.4#6332)