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Posted to user@hadoop.apache.org by ivan zhang <iv...@gmail.com> on 2013/09/10 02:08:52 UTC
Questions about BlockPlacementPolicy
Hi everyone:
I am now working on developing my own BlockPlacementPolicy for HDFS, is it
possible to set different block have different replication number? Like
different files have different copies? I make some try but it seems cannot
work
Thank you very much
Yifan
Re: Questions about BlockPlacementPolicy
Posted by Harsh J <ha...@cloudera.com>.
In HDFS, currently, the replication factor is a file-level property
and can't be controlled at a block level (at least on the metadata
end).
On Tue, Sep 10, 2013 at 5:38 AM, ivan zhang <iv...@gmail.com> wrote:
> Hi everyone:
>
> I am now working on developing my own BlockPlacementPolicy for HDFS, is it
> possible to set different block have different replication number? Like
> different files have different copies? I make some try but it seems cannot
> work
>
>
> Thank you very much
>
>
>
>
>
> Yifan
--
Harsh J
Re: Questions about BlockPlacementPolicy
Posted by Harsh J <ha...@cloudera.com>.
In HDFS, currently, the replication factor is a file-level property
and can't be controlled at a block level (at least on the metadata
end).
On Tue, Sep 10, 2013 at 5:38 AM, ivan zhang <iv...@gmail.com> wrote:
> Hi everyone:
>
> I am now working on developing my own BlockPlacementPolicy for HDFS, is it
> possible to set different block have different replication number? Like
> different files have different copies? I make some try but it seems cannot
> work
>
>
> Thank you very much
>
>
>
>
>
> Yifan
--
Harsh J
Re: Questions about BlockPlacementPolicy
Posted by Harsh J <ha...@cloudera.com>.
In HDFS, currently, the replication factor is a file-level property
and can't be controlled at a block level (at least on the metadata
end).
On Tue, Sep 10, 2013 at 5:38 AM, ivan zhang <iv...@gmail.com> wrote:
> Hi everyone:
>
> I am now working on developing my own BlockPlacementPolicy for HDFS, is it
> possible to set different block have different replication number? Like
> different files have different copies? I make some try but it seems cannot
> work
>
>
> Thank you very much
>
>
>
>
>
> Yifan
--
Harsh J
Re: Questions about BlockPlacementPolicy
Posted by Harsh J <ha...@cloudera.com>.
In HDFS, currently, the replication factor is a file-level property
and can't be controlled at a block level (at least on the metadata
end).
On Tue, Sep 10, 2013 at 5:38 AM, ivan zhang <iv...@gmail.com> wrote:
> Hi everyone:
>
> I am now working on developing my own BlockPlacementPolicy for HDFS, is it
> possible to set different block have different replication number? Like
> different files have different copies? I make some try but it seems cannot
> work
>
>
> Thank you very much
>
>
>
>
>
> Yifan
--
Harsh J