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From Tom Crayford <tcrayf...@heroku.com>
Subject Re: Use-case with lots of child nodes
Date Wed, 25 May 2016 10:06:25 GMT

I'd recommend rethinking your use case. Zookeeper isn't really great with
large amounts of data, nor does it handle high volumes of changes that well.

It looks like setting that system property will work for now, but I'd
expect trying to use such a high volume of child nodes would have severe
consequences for operational stability.


Tom Crayford
Heroku Kafka

On Wednesday, 25 May 2016, Szekeres, Zoltan <
Zoltan.Szekeres@morganstanley.com> wrote:

> Hi ZooKeeper users,
> I have a use-case where I need to create a very large number (~70,000)  of
> child nodes under a parent. These nodes themselves contain no data and will
> only have a handful of child nodes themselves.
> e.g.
>  /someparentNode/LotsOfChildNodesHere-1/ACoupleofNodesAtThisLevel
> /someparentNode/LotsOfChildNodesHere-2/ACoupleofNodesAtThisLevel
> ...
> /someparentNode/LotsOfChildNodesHere-70000/ACoupleofNodesAtThisLevel
> I've read (https://zookeeper.apache.org/doc/r3.4.8/zookeeperAdmin.html)
> there is a limit of 1 MB. But I hit the limit for the getChildren operation
> around 4 MB. I'm interested in what's causing the difference in the limit.
> I was able to increase the 4MB limit by setting the "jute.maxbuffer"
> system property at the client. Can I reliably use this system property in
> the future to set the limit?
> Any advice is appreciated.
> Thank you,
> Zoltan Szekeres
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