[ https://issues.apache.org/jira/browse/HDFS-1312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Eli Collins reopened HDFS-1312: ------------------------------- Agree, re-opening, let's have this issue track re-balancing disks within a DN. > Datanode storage directories fill unevenly > ------------------------------------------ > > Key: HDFS-1312 > URL: https://issues.apache.org/jira/browse/HDFS-1312 > Project: Hadoop HDFS > Issue Type: Bug > Components: data-node > Reporter: Travis Crawford > > Filing this issue in response to ``full disk woes`` on hdfs-user. > Datanodes fill their storage directories unevenly, leading to situations > where certain disks are full while others are significantly less used. Users > at many different sites have experienced this issue, and HDFS administrators > are taking steps like: > - Manually rebalancing blocks in storage directories > - Decomissioning nodes & later readding them > There's a tradeoff between making use of all available spindles, and filling > disks at the sameish rate. Possible solutions include: > - Weighting less-used disks heavier when placing new blocks on the datanode. > In write-heavy environments this will still make use of all spindles, > equalizing disk use over time. > - Rebalancing blocks locally. This would help equalize disk use as disks are > added/replaced in older cluster nodes. > Datanodes should actively manage their local disk so operator intervention is > not needed. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.