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From Stas Oskin <stas.os...@gmail.com>
Subject Re: Blocks replication in downtime even
Date Mon, 27 Apr 2009 18:54:00 GMT
Thanks.

2009/4/27 Koji Noguchi <knoguchi@yahoo-inc.com>

> http://hadoop.apache.org/core/docs/current/hdfs_design.html#Data+Disk+Fa
> ilure%2C+Heartbeats+and+Re-Replication<http://hadoop.apache.org/core/docs/current/hdfs_design.html#Data+Disk+Fa%0Ailure%2C+Heartbeats+and+Re-Replication>
>
> hope this helps.
>
> Koji
>
> -----Original Message-----
> From: Stas Oskin [mailto:stas.oskin@gmail.com]
> Sent: Monday, April 27, 2009 4:11 AM
> To: core-user@hadoop.apache.org
> Subject: Blocks replication in downtime even
>
> Hi.
>
> I have a question:
>
> If I have N of DataNodes, and one or several of the nodes have become
> unavailable, would HDFS re-synchronize the blocks automatically,
> according
> to replication level set?
> And if yes, when? As soon as the offline node was detected, or only on
> file
> access?
>
> Regards.
>

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