Hi Cagdas & Michael,
our cluster works fine with no crashes so far even with more than one million files - we have 11 datanodes and one namenode...

Cu on the 'net,
                       Bye - bye,

                                  <<<<< André <<<< >>>> èrbnA >>>>>

Michael Bieniosek wrote:
From my experience, the namenode almost never crashes.  It does use a lot of 
RAM, but not nearly as much as it used to.  You might have problems if you have 
many many small files (maybe 100,000s?).

I have had more problems with datanode failures, particularly when there is 
mapreduce-generated load on the machines running the datanodes.

-Michael

On 4/14/08 3:14 PM, "Cagdas Gerede" <[EMAIL PROTECTED]> wrote:

From your experience with Hadoop Distributed File System,
how reliable is the namenode? How often does it fail? Are there mechanisms
developed outside of Hadoop to make namenode more fault tolerant?

Thanks for your feedback,

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