Without familiarity of your classification tree, I think HDFS is a virtualized data store following a very common design pattern of partitioning and replication. (e.g. Distributed Hash Table).
The details is in how the partitions are splits, where is the location of replicas, what are the consistency model, what semantics is exposed to the users ... etc. So, HDFS is "File system semantics", "master/slave", "read-any-write-all" Rgds, Ricky -----Original Message----- From: Sirisha Akkala [mailto:[EMAIL PROTECTED] Sent: Saturday, December 06, 2008 10:55 PM To: [email protected] Subject: Re: Q about storage architecture Hi. Thanks for the link. I had gone through the material. I'm looking for help to classify this architecture into broader category, if possible. SAN/NAS/any other distributed terminology applicable? -Sirisha. ---- Original message ---- Date: Sat, 06 Dec 2008 22:22:49 -0800 From: Sagar Naik <[EMAIL PROTECTED]> Subject: Re: Q about storage architecture To: [email protected] http://hadoop.apache.org/core/docs/r0.18.2/hdfs_design.html Sirisha Akkala wrote: Hi I would like to know if Hadoop architecture more resembles SAN or NAS? -I'm guessing it is NAS. Or does it fall under a totally different category? If so, can you please email brief information? thanks,sirisha.
