Phantom wrote:
Basically my question is whether the namenode
is involved in every write request.
No.
Name node is contacted once for each "block". If your block size is 64MB
and you write 5GB file, namenode will be contacted once for each of the
16 blocks and once for closing the file.
Raghu.
Thanks
A
On 8/7/07, Raghu Angadi <[EMAIL PROTECTED]> wrote:
To write data to HDFS, you should be able to connect to both Namenode
and to all of the datanodes. NameNode decides where to place the data
blocks and tells the client (you) to send the blocks to corresponding
datanodes.
Raghu.
Phantom wrote:
Hi
When I write data into HDFS do I always need to connect to the datanode
to
write the data ? Can I connect to any namenode to do so ? If so how does
the
datanode keep track of where the various chunks are going to be placed ?
Any
resource that I can look at or could someone explain this to me ?
Thanks
A
