[jira] [Resolved] (HDFS-7541) Upgrade Domains in HDFS

["Ming Ma (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-7541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ming Ma resolved HDFS-7541.
---------------------------
       Resolution: Fixed
         Assignee: Ming Ma
    Fix Version/s: 2.9.0

Thanks for the everyone's input and contribution!

> 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
>            Assignee: Ming Ma
>             Fix For: 2.9.0
>
>         Attachments: HDFS-7541-2.patch, HDFS-7541.patch, SupportforfastHDFSdatanoderollingupgrade.pdf, UpgradeDomains_Design_v3.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.
>  



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