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Zookeeper, mail # user - znode defaults


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Shelley, Ryan 2012-02-22, 00:45
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Re: znode defaults
Ted Dunning 2012-02-22, 01:07
ZK doesn't do this out of the box, but it is very easy to wrap up ZK
primitives to get this behavior.

On Wed, Feb 22, 2012 at 12:45 AM, Shelley, Ryan <[EMAIL PROTECTED]>wrote:

> Hi folks. Very new to ZooKeeper and evaluating it for a project. The ZK
> directory-like layout is perfect for what I'm working on, for record
> storage, with one caveat. I'm curious if there's a way to set it up to
> return default records in the event a specific record isn't available (I'm
> attempting to reduce the number of round-trips to retrieve some data).
>
> For example:
>
> I create a node named "foo" with the data "lorem_ipsum":
> create /foo lorem_ipsum
>
> Then I create a node named "bar" under "foo" with the data "baz":
> create /foo/bar baz
>
> If I get "/foo/bar" obviously I'll get "baz", however, if I try to get
> "/foo/blah" I'd like to get "lorem_ipsum." I know this is highly suspect as
> a design pattern, but there's a method to the madness. We want to create
> records that can be overridden by sub-records (like "/foo/bar"), but in the
> event that sub-record doesn't exist, I'd get back the next concrete record.
>
> Any thoughts? Thanks!
>
> -Ryan
>
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Henry Robinson 2012-02-22, 01:19
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Shelley, Ryan 2012-02-22, 19:52
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nileader 2012-02-28, 07:49
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Shelley, Ryan 2012-02-22, 17:27