FAQ
Hi,



Does any one know how to speed up datanode decommissioning and
what are all the configurations

related to the decommissioning.

How to Speed Up Data Transfer from the Datanode getting
decommissioned.



Thanks & Regards,

Sravan kumar.

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  • Adarsh Sharma at Dec 16, 2010 at 7:32 am

    sravankumar wrote:
    Hi,



    Does any one know how to speed up datanode decommissioning and
    what are all the configurations

    related to the decommissioning.

    How to Speed Up Data Transfer from the Datanode getting
    decommissioned.



    Thanks & Regards,

    Sravan kumar.


    Check the attachment
    --Adarsh
  • Baggio liu at Dec 16, 2010 at 7:42 am
    You can use metasave to check the bottleneck of decommion speed,
    If the bottleneck is the speed of namenode dispatch. You can tuning
    dfs.max-repl-streams to a large number (default 2).
    If there're many timeout block replication tasks from pending replication
    queue to need replication , you can tuning
    dfs.replication.pending.timeout.sec to a smaller numer, to make block
    replcation more positive.

    Pay attention!! Please check your hadoop version, if block transfer has no
    speed limit, the bandwidth may be stuff full


    Thanks & Best regards
    Baggio


    2010/12/16 sravankumar <sravankumar@huawei.com>
    Hi,



    Does any one know how to speed up datanode decommissioning and
    what are all the configurations

    related to the decommissioning.

    How to Speed Up Data Transfer from the Datanode getting
    decommissioned.



    Thanks & Regards,

    Sravan kumar.

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