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From Jack Levin <magn...@gmail.com>
Subject Re: question about RS to DN timeouts
Date Tue, 05 Apr 2011 17:05:31 GMT
What I meant to say, suppose RS hdfs client is trying to read blocks
form a datanode, and I reboot or crash that datanode right at that
time, I would like RS hdfs client to switch to another datanode with
replicated blocks faster, so I would like to know if configs are
possible to change to affect it.


On Tue, Apr 5, 2011 at 9:56 AM, Jean-Daniel Cryans <jdcryans@apache.org> wrote:
> Those configs are about the interaction between the hbase client and
> region server.
> What you are trying to do doesn't make much sense IMO, there's no such
> thing as a primary datanode.
> J-D
> On Mon, Apr 4, 2011 at 2:43 PM, Jack Levin <magnito@gmail.com> wrote:
>>  <property>
>>    <name>hbase.client.pause</name>
>>    <value>1000</value>
>>    <description>General client pause value.  Used mostly as value to wait
>>    before running a retry of a failed get, region lookup, etc.</description>
>>  </property>
>>  <property>
>>    <name>hbase.client.retries.number</name>
>>    <value>10</value>
>>    <description>Maximum retries.  Used as maximum for all retryable
>>    operations such as fetching of the root region from root region
>>    server, getting a cell's value, starting a row update, etc.
>>    Default: 10.
>>    </description>
>>  </property>
>> Are those the numbers to adjust?  We want to be able to switch to
>> other datanodes that have replicated blocks faster should the primary
>> datanode be dead, network unavailable, or any other reason.
>> Thanks.
>> -Jack

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