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Date: Wed, 24 Feb 2010 19:18:29 +0000
Message-ID: <8bc75ecf1002241118h3070c66dle190a4ff7474369b@mail.gmail.com>
Subject: Re: how to lock one-of-many ?
From: Martin Waite <waite.134@googlemail.com>
To: zookeeper-user@hadoop.apache.org
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I had not thought of adding latency to the network interface.  I have
skimmed descriptions of how to do this with iptables (or ipchains - I can't
remember which is the standard now) - so it sounds plausible.  Whether this
is within my capabilities is another matter.

I really do not follow the delegator approach.  Is this something I would
patch into Zookeeper ?  Or the client ?

regards,
Martin

On 24 February 2010 18:40, Ted Dunning <ted.dunning@gmail.com> wrote:

> I do believe that it is relatively easy to set up high latency/high error
> network interface clones in Linux.  I haven't looked into that for several
> years, but it used to be pretty easy.
>
> You can also build a delegater that wraps a real ZK connection.  That would
> be more compatible with a mocked object style of development.
>
> On Wed, Feb 24, 2010 at 8:53 AM, Patrick Hunt <phunt@apache.org> wrote:
>
> > Is there a feature to introduce deliberate lag between the primary and
> its
> >> replicas in the ensemble - for development purposes ?  That could be
> >> useful
> >> for exposing latency assumptions.
> >>
> >>
> > No feature but it does sound interesting. Are there any tools that allow
> > one to setup "slow pipes" ala stunnel but here for latency not encryp? I
> > believe freebsd has this feature at the os (firewall?) level, I don't
> know
> > if linux does.
>
>
>
>
> --
> Ted Dunning, CTO
> DeepDyve
>

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