On Tue, May 18, 2010 at 9:40 PM, Mark Schnitzius
wrote:
>> If anyone has "war stories" on the topic of Cassandra & Hadoop (or
>> even just Hadoop in general) let me know.
>
> Don't know if it counts as a war story, but I was successful recently in
> implementing something I got advice on in an ear
>
> If anyone has "war stories" on the topic of Cassandra & Hadoop (or
> even just Hadoop in general) let me know.
Don't know if it counts as a war story, but I was successful recently in
implementing something I got advice on in an earlier thread, namely feeding
both a Cassandra table and a Had
xim Grinev"
> Sent: Tuesday, May 18, 2010 2:42am
> To: user@cassandra.apache.org
> Subject: Re: Hadoop over Cassandra
>
> On Tue, May 18, 2010 at 2:23 AM, Jonathan Ellis wrote:
>
>> On Mon, May 17, 2010 at 4:12 PM, Vick Khera wrote:
>> > On Mon,
: "Maxim Grinev"
Sent: Tuesday, May 18, 2010 2:42am
To: user@cassandra.apache.org
Subject: Re: Hadoop over Cassandra
On Tue, May 18, 2010 at 2:23 AM, Jonathan Ellis wrote:
> On Mon, May 17, 2010 at 4:12 PM, Vick Khera wrote:
> > On Mon, May 17, 2010 at 3:46 PM, Jonathan Ellis
>
Maxim,
Check out the getLocation() method from this file:
http://svn.apache.org/repos/asf/cassandra/trunk/src/java/org/apache/cassandra/hadoop/ColumnFamilyRecordReader.java
Basically, it loops over the list of nodes containing this split of
data and if any of them are the local node, it returns
On Tue, May 18, 2010 at 2:23 AM, Jonathan Ellis wrote:
> On Mon, May 17, 2010 at 4:12 PM, Vick Khera wrote:
> > On Mon, May 17, 2010 at 3:46 PM, Jonathan Ellis
> wrote:
> >> Moving to the user@ list.
> >>
> >> http://wiki.apache.org/cassandra/HadoopSupport should be useful.
> >
> > That documen
On Mon, May 17, 2010 at 4:12 PM, Vick Khera wrote:
> On Mon, May 17, 2010 at 3:46 PM, Jonathan Ellis wrote:
>> Moving to the user@ list.
>>
>> http://wiki.apache.org/cassandra/HadoopSupport should be useful.
>
> That document doesn't really answer the "is data locality preserved"
> when running t
On Mon, May 17, 2010 at 3:46 PM, Jonathan Ellis wrote:
> Moving to the user@ list.
>
> http://wiki.apache.org/cassandra/HadoopSupport should be useful.
That document doesn't really answer the "is data locality preserved"
when running the map phase, but my hunch is "no".
>
> On Mon, May 17, 2010
Moving to the user@ list.
http://wiki.apache.org/cassandra/HadoopSupport should be useful.
On Mon, May 17, 2010 at 2:41 PM, Yan Virin wrote:
> Hi,
> Can someone explain how this works? As long as I know, there is no execution
> engine in Cassandra alone, so I assume that Hadoop gives the MapRedu
