-Re: Data Locality with WebHDFS
Steve Loughran 2014-03-19, 09:42
1. All the specifics of Hadoop's operations are hidden in the source.
That's a get-out clause of OSS, I know, but sometimes it's the clearest.
2. For webhdfs I suspect it picks a local node with the data -you'd have
to experiment to make sure
3. If webhdfs is missing fetaures, I'm sure they'd be welcome
4. Hadoop 2.2+ uses protobuf for stable and cross platform IPC. , the
listLocatedStatus() call on a filesystem will give you all the locations of
blocks. Using that is another option -and probably higher performance- but
is going to require more upfront engineering than GET calls. Sticking to
WebHDFS -and extending it- is probably simpler
On 17 March 2014 17:29, RJ Nowling <[EMAIL PROTECTED]> wrote:
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