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From yamada hiroyuki <yamahiroy...@yahoo.co.jp>
Subject Re: How is Hbase column oriented ?
Date Fri, 03 Apr 2009 00:00:02 GMT
Hi Erik,

Thank you so much for your response.
It's something wrong in the email and I can't get the 
attached file.
Could you send it again, please ?
(or you could send it directly to me

I understand upcoming Hfile data structure and
how it's column-oriented.
Thank you again for your good explanation !


Hiroyuki Yamada

--- Erik Holstad <erikholstad@gmail.com> wrote:

> Hi Hiro!
> I attached a version of the current system layout,
> things will change a the
> lowest level for 0.20
> but the other things should stay the same.
> At the very bottom we are going to have something
> called a Hfile which is
> basically a list of
> something called KeyValues. The KeyValues are a byte
> [] including the key,
> row/family/column/timetsamp/type, and the value.
> What makes it column
> oriented at this level
> is that families are physically stored together.
> Depending on how big a row
> is you can different
> number of rows covered in a storefile.
> Hope this helps.
> Regards Erik

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