On Apr 26, 2011, at 10:40 PM, Konstantin Boudnik wrote:
Oops, the message came out garbled. I meant to say
I assume the outlined changes won't prevent an earlier version of
HDFS from
upgrades to the federation version, right?
Yes absolutely. We have tested upgrades .
Besides our ops will throw us out of the window if we even hint that
there isn't an
automatic upgrade for the next release :-)
sanjay
Thanks in advance,
Cos
On Tue, Apr 26, 2011 at 17:59, Konstantin Boudnik <c...@apache.org>
wrote:
Sanjay,
I assume the outlined changes won't an earlier version of HDFS from
upgrads to the federation version, right?
Cos
On Tue, Apr 26, 2011 at 17:26, Sanjay Radia <sra...@yahoo-inc.com>
wrote:
Changes to the code base
- The fundamental code change is to extend the notion of block id
to now
include a block pool id.
- The NN had little change, the protocols did change to include
the block
pool id.
- The DN code did change. Each data structure is now indexed by
the block
pool id -- while this is a code change, it is architecturally very
simple
and low risk.
- We also did a fair amount of cleanup of threads used to send
block reports
- while it was not strictly necessary to do the cleanup we took
the extra
effort to pay the technical debt. As Dhruba recently noted, adding
support
to send block reports to primary and secondary NN for HA will be
now much
easier to do.
