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Cc: "hdfs-user@hadoop.apache.org" <hdfs-user@hadoop.apache.org>
From: Steve Cohen <mail4steve@gmail.com>
Subject: Re: replicating existing blocks?
Date: Wed, 18 May 2011 20:07:21 -0400
To: "hdfs-user@hadoop.apache.org" <hdfs-user@hadoop.apache.org>

Thanks for the answer. Earlier, I asked about why I get occasional not repli=
cated yet errors. Now, I had dfs.replication set to one. What replication co=
uld it have been doing? Did the error messages actually mean that the file c=
ouldn't get created in the cluster?

Thanks,
Steve Cohen


On May 18, 2011, at 6:39 PM, Todd Lipcon <todd@cloudera.com> wrote:

> Tried to send this, but apparently SpamAssassin finds emails about
> "replicas" to be spammy. This time with less rich text :)
>=20
> On Wed, May 18, 2011 at 3:35 PM, Todd Lipcon <todd@cloudera.com> wrote:
>>=20
>> Hi Steve,
>> Running setrep will indeed change those files. Changing "dfs.replication"=
 just changes the default replication value for files created in the future.=
 Replication level is a file-specific property.
>> Thanks
>> -Todd
>>=20
>> On Wed, May 18, 2011 at 3:32 PM, Steve Cohen <mail4steve@gmail.com> wrote=
:
>>>=20
>>> Say I add a datanode to a pseudo cluster and I want to change the
>>> replication factor to 2. I see that I can either run hadoop fs -setrep
>>> or change the hdfs-site.xml value for dfs.replication. But do either
>>> of these cause the existing blocks to replicate?
>>>=20
>>> Thanks,
>>> Steve Cohen
>>=20
>>=20
>>=20
>> --
>> Todd Lipcon
>> Software Engineer, Cloudera
>=20
>=20
>=20
> --
> Todd Lipcon
> Software Engineer, Cloudera