hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Mirko Kämpf <mirko.kae...@googlemail.com>
Subject problem of lost name-node
Date Tue, 27 Sep 2011 15:36:58 GMT
during the Cloudera Developer Training at Berlin I came up with an idea,
regarding a lost name-node.
As in this case all data blocks are lost. The solution could be, to have a
table which relates filenames and block_ids on that node, which can be
after a name-node is lost. Or on every block could be a kind of a backlink
to the filename and the total nr of blocks and/or a total hashsum attached.
This would it make easy to recover with minimal overhead.

Now I would like to ask the developer community, if there is any good reason
not to do this?
Before I start to figure out where to start an implementation of such a


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