This is better asked on the Zookeeper lists.
The first answer is that global atomic operations are a generally bad idea.
The second answer is that if you an batch these operations up then you can
cut the evilness of global atomicity by a substantial factor.
Are you sure you need a global counter?
On Fri, Oct 26, 2012 at 11:07 PM, David Parks <[EMAIL PROTECTED]>wrote:
> How can we manage cluster-wide atomic operations? Such as maintaining an
> auto-increment counter.
> Does Hadoop provide native support for these kinds of operations?
> An in case ultimate answer involves zookeeper, I'd love to work out doing
> this in AWS/EMR.