cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Apache Wiki <wikidi...@apache.org>
Subject [Cassandra Wiki] Update of "DigestQueries" by KirkTrue
Date Sat, 02 Jul 2011 06:07:13 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Cassandra Wiki" for change notification.

The "DigestQueries" page has been changed by KirkTrue:
http://wiki.apache.org/cassandra/DigestQueries?action=diff&rev1=1&rev2=2

- A "digest" query is like a ready query except that instead of the receiving node actually
returning the data, it only returns a digest (hash) of the would-be data.
+ A "digest" query is like a read query except that instead of the receiving node actually
returning the data, it only returns a digest (hash) of the would-be data.
  
  The intent of submitting a digest query is to discover whether two or more nodes agree on
what the current data is, without sending the data over the network. In particular for large
amounts of data, this is a significant saving of bandwidth cost relative to sending the full
data response.
  

Mime
View raw message