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From Alex Loddengaard <a...@cloudera.com>
Subject Re: Hadoop as Cloud Storage
Date Tue, 16 Jun 2009 17:33:51 GMT
Hey Wildan,

HDFS is successfully storing well over 50TBs on a single cluster.  It's
meant to store data that will be analyzed in a MR job, but it can be used
for archival storage.  You'd probably consider deploying nodes with lots of
disk space vs. lots of RAM and processor power.  You'll want to do a cost
analysis to determine if tape or HDFS is cheaper.

That said, you should know a few things about HDFS:

   - Its read path is optimized for high throughput, and doesn't care as
   much about latency (read: it's got high latency relative to other file
   - It's not meant for small files, so ideally your video files will be at
   least ~100MB each
   - It requires that the machines that makeup your cluster be running
   whenever you want to access or store data.  (Note that HDFS survives if a
   small percentage of your nodes go down; it's built with fault tolerance in

I hope this clears things up.  Let me know if you have any other questions.


On Tue, Jun 16, 2009 at 2:44 AM, W <wildan.m@gmail.com> wrote:

> Dear Hadoop Guru's,
> After googling and find some information on using hadoop as cloud
> storage (long term).
> I have a problem to maintain lots of data (around 50 TB) much of them
> are TV Commercial (video files).
> I know, the best solution for long term file archiving is using tape
> backup, but i just curious, is hadoop
> can be used as 'data archiving' platform ?
> Thanks!
> Warm Regards,
> Wildan
> ---
> OpenThink Labs
> http://openthink-labs.tobethink.com/
> Making IT, Business and Education in Harmony
> >> 087884599249
> Y! : hawking_123
> Linkedln : http://www.linkedin.com/in/wildanmaulana

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