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From "Kevin Burton" <rkevinbur...@charter.net>
Subject RE: CREATE COLUMNFAMILY
Date Sun, 11 Nov 2012 19:06:05 GMT
Thank you this helps with my understanding. 

So the goal here is to supply as many name/type pairs as can be reasonably
be foreseen when the column family is created? Can the metadata be applied
after the fact? If so how?

-----Original Message-----
From: Edward Capriolo [mailto:edlinuxguru@gmail.com] 
Sent: Sunday, November 11, 2012 9:37 AM
To: user@cassandra.apache.org
Subject: Re: CREATE COLUMNFAMILY

If you supply metadata cassandra can use it for several things.

1) It validates data on insertion
2) Helps display the information in human readable formats in tools like the
CLI and sstabletojson
3) If you add a built-in secondary index the type information is needed,
strings sort differently then integer
4) columns in rows are sorted by the column name, strings sort differently
then integers

On Sat, Nov 10, 2012 at 11:55 PM, Kevin Burton <rkevinburton@charter.net>
wrote:
> I am sure this has been asked before but what is the purpose of 
> entering key/value or more correctly key name/data type values on the 
> CREATE COLUMNFAMILY command.
>
>
>
>


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