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From: "Toader, Sebastian" <Sebastian.Toader@morganstanley.com>
To: <mahadev@apache.org>,
	<Camille.Fournier@gs.com>,
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CC: "Csuka, Zsolt" <Zsolt.Csuka@MorganStanley.com>,
	"Hejj, Botond" <Botond.Hejj@MorganStanley.com>,
	"Keis, Andrei" <Andrei.Keis@morganstanley.com>,
	"Mekaraj, Prashant" <Prashant.Mekaraj@morganstanley.com>
Date: Fri, 13 May 2011 09:42:41 +0100
Subject: RE: ZK quota management
Thread-Topic: ZK quota management
thread-index: AcwQ13aFMVn+uRTpQwmzk5noSP6+DAAba8/AAADBEgAAAF61AA==
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Hi all,

We are using ZooKeeper internally and ran into same issue where we =
wanted Quotas to impose hard restrictions. We needed this primarily to =
protect ZooKeeper server against rogue client applications that may =
cause Zk server to use up the allocated memory thus affecting other =
clients as well.

We've changed ZooKeeper's (version 3.3) code to impose hard =
restrictions. Currently it's in testing. Once we are happy with how it =
we are planning to push changes back so it will be available for others =
as well.

One thing to note our implementation is not configurable whether to =
impose quota or just warn if quota exceeded, it always enforces quotas =
if set on a znode.

Best regards,
Seb

-----Original Message-----
From: Mahadev Konar [mailto:mahadev@apache.org]=20
Sent: Friday, May 13, 2011 12:35 AM
To: user@zookeeper.apache.org
Subject: Re: ZK quota management

The current quotas doesnt really impose hard restrictions on quota. It
would be nice to change the quotas to impose that. This shouldnt be a
big change but again given the Multitxn patch it might be a litte more
complicated.

thanks
mahadev

On Wed, Apr 27, 2011 at 2:13 PM, Fournier, Camille F. [Tech]
<Camille.Fournier@gs.com> wrote:
> I was wondering if any of you used the Quotas feature in ZK in your =
production systems. If so, do you find it useful? How does it affect =
performance?
>
> Thanks,
> Camille
>
>


--=20
thanks
mahadev
@mahadevkonar

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