On 1/5/08 12:34 AM, "Greg Connor" <[EMAIL PROTECTED]> wrote:
> Since you mentioned ZFS, I went and looked at it today, and it definitely is
> all kinds of cool. ZFS is an excellent example of a robust, feature-rich
> filesystem, at least if it does what it's documentation claims it does.
It d
Hi folks, I'm still a noob in the hadoop world, so I apologize if this is
already asked and answered. This thread seems pretty recent, so hopefully it's
OK if I jump in. I trust folks to politely correct me if I'm way off base.
(This is not really a question per se, but more a request for com
Joydeep Sen Sarma wrote:
agreed - i think for anyone who is thinking of using hadoop as a place from where data is served - has to be distrubed by lack of data protection.
replication in hadoop provides protection against hardware failures. not software failures. backups (and depending on how t
gt; tape - which is really what our filers are becoming) is worth discussing.
>> for large data sets - the restore time would be so bad as to render these
>> useless as a recovery path).
>>
>>
>>
>> From: Pat Ferrel [mailto:
ion of backing up to tape (or even virtual
> tape - which is really what our filers are becoming) is worth discussing.
> for large data sets - the restore time would be so bad as to render these
> useless as a recovery path).
>
> ____________
>
> From: Pat Fer
Well, we are kind of a poster child for this kind of reliability calculus.
We opted for Mogile for real-time serving because we could see how to split
the master into shards and how to do HA on it. For batch oriented processes
where a good processing model is important, we use hadoop.
I would ha
me would be so bad as to render these
useless as a recovery path).
From: Pat Ferrel [mailto:[EMAIL PROTECTED]
Sent: Thu 12/20/2007 7:25 AM
To: hadoop-user@lucene.apache.org
Subject: Re: Some Doubts of hadoop functionality
> 2. If hadoop is configured in mul
overy path).
From: Pat Ferrel [mailto:[EMAIL PROTECTED]
Sent: Thu 12/20/2007 7:25 AM
To: hadoop-user@lucene.apache.org
Subject: Re: Some Doubts of hadoop functionality
> 2. If hadoop is configured in multinode cluster(with One machine as namenode
>> > and jobtracker and
> 2. If hadoop is configured in multinode cluster(with One machine as namenode
>> > and jobtracker and other machine as slave. Namenode acts as a slave node
>> > also) . How to handle the namenode failovers?.
>
> There are backup mechanisms that you can use to allow you rebuild the name
> node. T
On 12/19/07 11:17 PM, "M.Shiva" <[EMAIL PROTECTED]> wrote:
> 1.Did Separate machines/nodes needed for Namenode ,Jobtracker, Slavenodes
No. I run my namenode and job-tracker on one of my storage/worker nodes.
You can run everything on a single node and still get some interesting
results becau
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