Are there plans to build-in some sort of map-reduce framework into Cassandra
and CQL? It seems that users should be able to apply a Java method to
selected rows in parallel on the distributed Cassandra JVMs. I believe
Solandra uses such an integration.
Don
QL enhancements also belong in the same jira project, or somewhere else?
Ernie
On Thu, Dec 22, 2011 at 11:51 AM, Don Smith
mailto:dsm...@likewise.com>> wrote:
FYI, I submitted an enhancement
ticket<https://issues.apache.org/jira/browse/CASSANDRA-3660?page=com.atlassian.jira.plugin.syste
with Cassandra for a good while now,
but when I first started little things like this were confusing.
From: Don Smith [mailto:dsm...@likewise.com]
Sent: Friday, December 09, 2011 3:41 PM
To: user@cassandra.apache.org
Subject: Suggestion about syntax of CREATE COLUMN FAMILY
Currently, the syntax fo
VIrgil apparently lets you access cassandra via a RESTful interface:
http://code.google.com/a/apache-extras.org/p/virgil/
Depending on your performance needs and the maturity of virgil's code (I think
it's alpha), that may work.
You could always fork a java process and pipe to it.
Don
___
Currently, the syntax for creating column families is like this:
create column family Users
with comparator=UTF8Type
and default_validation_class=UTF8Type
and key_validation_class=UTF8Type;
It's not clear what "comparator" and "default_validation_class" refer to. Much
clearer would be:
create c
cli's "show keyspaces" command shows way too much information by default.
I think by default it should show just one line per keyspace. A "-v"
option could show more info.
What GUI alternatives are there to cli for browsing a cassandra ring?
Lots of people WILL use cli, so it should be spif
:15 AM, Patricio Echagüe wrote:
Hi Don. No it will not. IndexedSlicesQuery will read just the amount
of rows specified by RowCount and will go to the DB to get the new
page when needed.
SetRowCount is doing indexClause.setCount(rowCount);
On Mon, Oct 10, 2011 at 3:52 PM, Don Smith <mailto:d
Hector's IndexedSlicesQuery has a setRowCount method that you can use to
page through the results, as described in
https://github.com/rantav/hector/wiki/User-Guide .
rangeSlicesQuery.setRowCount(1001);
.
rangeSlicesQuery.setKeys(lastRow.getKey(), "");
Is it efficient? Spe
Does Cassandra shard the columns of a single row across multiple nodes
so that to read the columns of the row it may need access to multiple
nodes? I'd say "no." Will a read from a given node ever return
partial results or is the write to a node of a row atomic?
Thanks, Don
