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Date: Sat, 27 Jun 2015 20:23:27 +0530
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Subject: Re: Hbase master selection doubt
From: Shushant Arora <shushantarora09@gmail.com>
To: user@hbase.apache.org
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Zookeeper is Sequential Consistency
Updates from a client will be applied in the order that they were sent.

On Sat, Jun 27, 2015 at 8:18 PM, Ted Yu <yuzhihong@gmail.com> wrote:

> bq. non strictly consistency of Zookeeper
>
> Can you elaborate on what the above means ?
>
> please read this:
>
> http://zookeeper.apache.org/doc/trunk/zookeeperProgrammers.html#ch_zkGuarantees
>
> Cheers
>
> On Sat, Jun 27, 2015 at 7:20 AM, Shushant Arora <shushantarora09@gmail.com
> >
> wrote:
>
> > How Hbase uses Zookeeper for Master selection and region server failure
> > detection when Zookeeper is not strictly consistent.
> >
> > Say In Hbase Master selection process, how does a node is 100 % sure
> that a
> > master is created ? Does it has to create the /master node and that node
> > already exists will thow node exists excpetion .  Since only by reading
> (ls
> > /) . It may get stale data and gets node does not exists.but in actual
> > /master was present.
> >
> > Does there any issue with non strictly consistency of Zookeeper for
> Hbase?
> >
>

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