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Ming Ma updated HDFS-7541: -------------------------- Attachment: HDFS-7541.patch > Upgrade Domains in HDFS > ----------------------- > > Key: HDFS-7541 > URL: https://issues.apache.org/jira/browse/HDFS-7541 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Ming Ma > Attachments: HDFS-7541.patch, > SupportforfastHDFSdatanoderollingupgrade.pdf, UpgradeDomains_design_v2.pdf > > > Current HDFS DN rolling upgrade step requires sequential DN restart to > minimize the impact on data availability and read/write operations. The side > effect is longer upgrade duration for large clusters. This might be > acceptable for DN JVM quick restart to update hadoop code/configuration. > However, for OS upgrade that requires machine reboot, the overall upgrade > duration will be too long if we continue to do sequential DN rolling restart. > -- This message was sent by Atlassian JIRA (v6.3.4#6332)