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From Zizon Qiu <zzd...@gmail.com>
Subject Re: when does hdfs start to fix under-replication of a block?
Date Sun, 08 Jan 2012 06:17:53 GMT
You may achieve this by setting a large "heartbeat.recheck.interval" to
prevent it from being marked as dead,but this is not recommended.

Just take the datanode down,do whatever your want and bring it back.
When successfully heartbeated , the FSNamesystem will recognize the those
missing blocks had back.

On Sun, Jan 8, 2012 at 11:27 AM, Koert Kuipers <koert@tresata.com> wrote:

> can someone point me to the exact rules? thanks!
> for example, i want to know if i can take down a slave for the afternoon
> to fix something on the machine, without causing the cluster to start
> creating extra copies of blocks that reside on that slave because the
> replication count is down.

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