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From: Ivan Chernetsky <ichernetsky@mesosphere.com>
Date: Fri, 22 Sep 2017 11:54:08 -0700
Message-ID: <CAGivrP+XyxCNDC6Jh0B1uyceoQrZvpQFT42u4Cy_3D30novv2A@mail.gmail.com>
Subject: Re: Is sync effectively recursive?
To: user@zookeeper.apache.org
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archived-at: Fri, 22 Sep 2017 18:54:13 -0000

Hi Ivan,

Thanks a lot for getting back to me so quickly.

> > Then the client A shuts down, and the client B comes up. If the client B
> > does a sync on /, is it safe to assume that reading /parent, or
> > /parent/childA or any other node is safe meaning that the client B will see
> > all the most recent updates made by the client A?

> Yes, sync flushes the channels between the connected server and the
> leader, so once you call sync, any further requests will see at least
> the true state of the cluster at the time the sync was called. I dunno
> why it takes a path, since zk has only one log.

This is what I assumed, and it absolutely makes sense. Though I was
not sure whether all the in-memory data structures get updated for _all_
ZK nodes on a log sync. Just wanted to double-check.

Thanks again.

Regards,
Ivan.