cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <>
Subject Re: how to implement the function similar to inbox search?
Date Tue, 22 Jun 2010 18:57:24 GMT
Not having an index doesn't matter if you're going to read all the
subcolumns back at once, which IIANM is the idea here.

On Mon, Jun 21, 2010 at 12:20 PM, hu wei <> wrote:
> in datamodel wiki:
>  You can think of each super column name as a term and the columns within as
> the docids with rank info and other attributes being a part of it. If you
> have keys as the userids then you can have a per-user index stored in this
> form. This is how the per user index for term search is laid out for Inbox
> search at Facebook.
> a question: because subcolumn does't has index ,does it has performance
> bottleneck?

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support

View raw message