Hi Patrick,
Internally, ZkMultiLock constructs single path ZkReadLock and ZkWriteLock
objects to handle the lock paths you add to it. These work in a similar way
to that described in the ZooKeeper recipes.
If you only add a single lock path to ZkMultiLock, then when you try and
acquire() it
Hi Mahadev,
Thanks for your interest.
We currently use Cages to apply locking where necessary in our operations
against the Cassandra database, to manage node membership of an in-house
clustered distributed platform called Starburst, and soon for maintaining
centralized configuration for those
Anyone interested in using Cages and ZooKeeper with NoSQL databases might
like new blog post
http://ria101.wordpress.com/2010/05/12/locking-and-transactions-over-cassandra-using-cages/
On 12 May 2010 00:02, Dominic Williams thedwilli...@googlemail.com wrote:
Anyone looking for a Java client
Hi Dominic,
Good to see this. I like the name cages :).
You might want to post to the list what cages is useful for. I think quite a
few folks would be interested in something like this. Are you guys currently
using it with cassandra?
Thanks
mahadev
On 5/11/10 4:02 PM, Dominic Williams
Hi Dominic, this looks really interesting thanks for open sourcing it. I
really like the idea of providing higher level concepts. I only just
looked at the code, it wasn't clear on first pass what happens if you
multilock on 3 paths, the first 2 are success, but the third fails. How
are the
HI Avinash,
The zk client does itself maintain liveness information and also
randomizes the list of servers to balance the number of clients connected to
a single ZooKeeper server.
Hope that helps.
Thanks
mahadev
On 4/27/10 10:56 AM, Avinash Lakshman avinash.laksh...@gmail.com wrote:
Let's
Lei,
A contrary question for you is why you don't just share zk sessions within a
single process.
On Tue, Apr 27, 2010 at 5:17 PM, Lei Zhang lzvoya...@gmail.com wrote:
I am
in the process of changing to each thread of each daemon maintaining a zk
session. That means we will hit this 10
Ted -
You can think of this as a problem with using singleton in a multi-threaded
program. The solution that provides better code readability at affordable
cost should win.
Specifically the problem I am trying to solve is this:
We have a multi-threaded webapp based on a framework (means I am
Is org.apache.zookeeper.ZooKeeper thread safe?
I've started walking through the code to check for mutability, and
although the first level children are protected, I haven't fully walked
the graph. Perhaps I should ask, is it supposed to be thread safe?
-Todd
HI Satish,
A zookeeper client usually has a very small footprint for memory and cpu.
The mutithreaded version of zookeeper client creates an internal thread to
do the io and callbacks. I would suggest using the same zookeeper client
across the objects to have less number of threads in your
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