hadoop-common-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Matthew John <tmatthewjohn1...@gmail.com>
Subject doubts
Date Wed, 13 Oct 2010 12:12:08 GMT
Hi all ,

Had some doubts :

1) what happens when a mapper running in node A needs data from a block it
does nt have ? ( the block might be present in some other node in the
cluster )

2) in the Sort/Shuffle phase is just a logical representation of all map
outputs together sorted rite ? and again, what happens when reduce in Node C
needs access of some map outputs not in its memory?

Matthew .

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message