Hi Chen, Let's say that the value of a znode /test is initially v
and client A writes value v' to znode /test. If the server that
client B is connected to has not persisted the update operation of A,
it will read v. If it submits sync before the read, client B will read
v'.
-Flavio
On
Hi Chen, this section of the docs has details on our guarantees, in
particular see the note:
http://hadoop.apache.org/zookeeper/docs/current/zookeeperProgrammers.html#ch_zkGuarantees
Patrick
On 04/29/2010 07:42 AM, Flavio Junqueira wrote:
Hi Chen, Let's say that the value of a znode /test is
In general, the guarantee is that B will do exactly as you say it will
read the new value or the old value. Your question depends on a definition
of now that spans several machines. That is a dangerous concept and if
your reasoning requires it, you are headed for trouble.
On Thu, Apr 29,
Ted, this is my browser homepage ;-)
http://en.wikipedia.org/wiki/Fallacies_of_Distributed_Computing
Patrick
On 04/29/2010 09:14 AM, Ted Dunning wrote:
In general, the guarantee is that B will do exactly as you say it will
read the new value or the old value. Your question depends on a
I tend to say that the cost of Now scales very badly with the diameter of
the Now that you are buying. A 5 cm Now is quite cheap. A 10 m Now is
quite expensive and the cost of a 1000 km Now is more than you can imagine.
On Thu, Apr 29, 2010 at 9:55 AM, Patrick Hunt ph...@apache.org wrote:
