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From yiyu jia <jia.y...@gmail.com>
Subject Re: Storing images in Hbase
Date Mon, 28 Jan 2013 21:44:16 GMT
Hi Andy,

Thanks a lot for sharing. Yes. I am not talking about static content
caching, which may be called as internal CDN today.

I am asking some techniques of configuring cache on different layers with
concerning about avoiding duplicate caching on different layers.

thanks and regards,

Yiyu


On Mon, Jan 28, 2013 at 4:13 PM, Andrew Purtell <apurtell@apache.org> wrote:

> You bring up a very common consideration I think.
>
> For static content, such as images, then a cache can help offload read load
> from the datastore. This fits into this conversation.
>
> For dynamic content, then an external caching may not be helpful as you
> say, although blockcache within HBase will help if you are assembling
> content dynamically from repeated queries some of which are bringing in the
> same data over and over.
>
> On Mon, Jan 28, 2013 at 12:23 PM, yiyu jia <jia.yiyu@gmail.com> wrote:
>
> > Let's say I have an web application which use HBase as data source at the
> > backend. I have cache configured in my reverse proxy which is at the
> front
> > of my Web server. And the cache is configured based on URL pattern or
> > parameters. In this case, the cached data will be delivered to the client
> > if the input parameter/url is same. So, the same data cached behind Web
> > server wil not be hitted. if this is the case, I will say the cache
> between
> > HBase and HDFS will not be helpful.
> >
>
> --
> Best regards,
>
>    - Andy
>
> Problems worthy of attack prove their worth by hitting back. - Piet Hein
> (via Tom White)
>

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