[ https://issues.apache.org/jira/browse/HDFS-3544?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Wang resolved HDFS-3544. ------------------------------- Resolution: Won't Fix HDFS-RAID has been removed and native EC support is available at HDFS-7285. Closing as won't fix. > Ability to use SimpleRegeratingCode to fix missing blocks > --------------------------------------------------------- > > Key: HDFS-3544 > URL: https://issues.apache.org/jira/browse/HDFS-3544 > Project: Hadoop HDFS > Issue Type: Improvement > Components: contrib/raid > Reporter: dhruba borthakur > > ReedSolomon encoding (n, k) has n storage nodes and can tolerate n-k > failures. Regenerating a block needs to access k blocks. This is a problem > when n and k are large. Instead, we can use simple regenerating codes (n, k, > f) that does first does ReedSolomon (n,k) and then does XOR with f stripe > size. Then, a single disk failure needs to access only f nodes and f can be > very small. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org