I think it would be good to have a design document, just to reason
about it and make sure that the mechanism we are introducing is not
flawed. It is easy to get these things wrong.
-Flavio
On Feb 18, 2010, at 11:30 PM, Henry Robinson wrote:
Hari -
It's very difficult to say how long this would take. There are a
number of
issues that need to be resolved by design rather than code. For
example, the
question of finding the cluster when the membership has changed is
unanswered.
The changes to the core protocol will need substantial peer review and
testing. Judging by my experience with the observers patch, which I
think is
comparable in size but probably less complex, I would expect about 3-6
months from the time someone picks up the work.
cheers,
Henry
On 18 February 2010 12:28, Hariharan Subramanian
<hurryha...@gmail.com>wrote:
Thanks to all of you that responded. This feature is also important
to the
project I am working on. Although we would have to find someone
with the
right skills to contribute to it.
Henry, Do you have an estimate on how long this task would take if
someone
were to start with your prototype?
Thanks again
~ Hari
On Thu, Feb 18, 2010 at 1:35 PM, Henry Robinson
<he...@cloudera.com>wrote:
Hi -
Yes, I'm still interested in this JIRA but it's a significant
change to ZK
which would be best suited for probably the 4.0 release. I have a
rough
implementation that 'works' but still leaves some issues
unresolved. I
don't
have a great deal of time for this issue at the moment though,
which is
why
it's stalled a bit - other ZK issues are more pressing. This would
be a
really great project for anyone looking for a meaty distributed
systems
project; I'm happy to offer guidance and advice if anyone wants to
take it
on!
Henry
On 18 February 2010 09:58, Patrick Hunt <ph...@apache.org> wrote:
There are ways to "dynamically" update the cluster membership
today,
granted while they are dynamic they are not dynamic in the sense
of 107:
http://bit.ly/bTTdDK (see item 6)
107 is still pending. Henry was interested to implement this, I'm
not
sure
his current status. Henry? I think this is a good feature to add,
but it
brings up a number of issues that we need to work through. Given
that
most
ppl rarely change cluster membership, and the fact that there are
options
available today, there hasn't been a lot of demand for this.
Patrick
Hariharan Subramanian wrote:
Dear Zookeeper community,
I would like to know the status of issue ZOOKEEPER-107 (Allow
dynamic
changes to server cluster membership) which is assigned to Henry
Robinson
Is this the right forum to ask this question or should I post an
update
to
the bug report?
Thanks
-- Hari
--
Henry Robinson
Software Engineer
Cloudera
415-994-6679
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Henry Robinson
Software Engineer
Cloudera
415-994-6679
