great, I'm happy you found Hector useful :)
btw, in hector 0.5.0-8 I added some interesting performance JMX counters so
may be worth to update yours from 0.5.0-6 to -8 when you have time.
On Fri, Mar 12, 2010 at 11:55 PM, Ned Wolpert wrote:
> Document updated
>
>
> On Fri, Mar 12, 2010 at 2:50 PM
Cassandra is a column oriented db, similar to bigtables data model and to
hbase's data mode (although implementations differ)
hbase, btw, isn't a map-reduce implementation, you probably meant hadoop
In version 6 cassandra will add support for hadoop so it'll have mapr, but
it's not the core of cass
fwiw, I read the instructions at contrib/word_count/README and it has like 3
manual steps, so using an embedded cassandra instance may simplify this into
one single step and let the program do all setup and teardown it requires.
http://prettyprint.me/2010/02/14/running-cassandra-as-an-embedded-serv
Grossman wrote:
> Hi Ran,
>
> Is it support operation on super column ?
> Thanks
>
> On Tue, Feb 23, 2010 at 4:13 PM, Ran Tavory wrote:
>
>> I've written a java library for cassandra I've been using internally,
>> would love to get your feedback and hop
I've written a java library for cassandra I've been using internally, would
love to get your feedback and hope you find it useful.
Blog post: http://prettyprint.me/2010/02/23/hector-a-java-cassandra-client/
Source: http://github.com/rantav/hector
High level features:
o A high-level object oriente
nodes, the more behind on compactions they can get. We consider
> this a bug, and CASSANDRA-685 will be exploring solutions so that your
> client automatically backs off as a node becomes overloaded.
>
> Thanks,
> Stu
>
> -Original Message-
> From: "Ran Tav
CASSANDRA-804 is going to be a real fix.
Thanks
On Sat, Feb 20, 2010 at 9:36 PM, Jonathan Ellis wrote:
> if OPP is configured w/ imbalanced ranges (or less balanced than RP)
> then that would explain it.
>
> OPP is actually slightly faster in terms of raw speed.
>
> On
gt; though test1 is not completely dead yet.
>
> On Thu, Feb 18, 2010 at 1:16 AM, Ran Tavory wrote:
> > I found another interesting graph, attached.
> > I looked at the write-count and write-latency of the CF I'm writing to
> and I
> > see a few interesting things:
t to happen?
Thanks
On Wed, Feb 17, 2010 at 9:00 PM, Tatu Saloranta wrote:
> On Wed, Feb 17, 2010 at 6:40 AM, Ran Tavory wrote:
> > If it's the data directory, then I have a pretty big one. Maybe it's
> > something else
> > $ df -h /outbrain/cassandra/data
2010 at 4:34 PM, Jonathan Ellis wrote:
> On Wed, Feb 17, 2010 at 8:19 AM, Ran Tavory wrote:
> > Are we talking about the CommitLogDirectory that needs to be up 2x?
>
> no. data, not commitlog.
>
> > So it needs to be 2x of what? Did I miss this in the config file
>
ot;disk too full" is almost certainly actually the
> problem.
>
> created https://issues.apache.org/jira/browse/CASSANDRA-804 to fix this.
>
> On Wed, Feb 17, 2010 at 5:59 AM, Ran Tavory wrote:
> > no, that's not it, disk isn't full.
> > After restarting the
full
>
> 2010/2/17 Ran Tavory
>
> I'm running some high load writes on a pair of cassandra hosts using an
>> OrderPresenrvingPartitioner and ran into the following error after which one
>> of the hosts killed itself.
>> Has anyone seen it and can advice?
>&
I'm running some high load writes on a pair of cassandra hosts using an
OrderPresenrvingPartitioner and ran into the following error after which one
of the hosts killed itself.
Has anyone seen it and can advice?
(cassandra v0.5.0)
ERROR [HINTED-HANDOFF-POOL:1] 2010-02-17 04:50:09,602 CassandraDaem
to keep the server alive.
> Thanks
>
> Richard
>
> On Sun, Jan 24, 2010 at 12:02 PM, Ran Tavory wrote:
>
>> Here's the code I've just written over the weekend and started using in
>> test:
>>
>>
>> package com.outbrain.data.cassandra.serv
yeah, it would. I was doing it under the assumption I don't want to change
the source for cassandra but I'll work on putting it into contrib and add
that c'tor as well.
2010/1/25 Ted Zlatanov
> On Sun, 24 Jan 2010 13:56:07 +0200 Ran Tavory wrote:
>
> RT> On S
agreed on the System.getProperty("java.io.tmpdir")
I can put this under contrib if you think it's useful.
On Sun, Jan 24, 2010 at 1:16 PM, gabriele renzi wrote:
> On Sun, Jan 24, 2010 at 11:02 AM, Ran Tavory wrote:
> > Here's the code I've just written ove
long as this is the last thread alive, don't hang
the app for it and quit.
On Sun, Jan 24, 2010 at 12:20 PM, Richard Grossman wrote:
> Great Ran,
>
> I think I've missed the .setDaemon to keep the server alive.
> Thanks
>
> Richard
>
> On Sun, Jan 24, 2010 at 12:02
ens to the thrift
interface.
* Useful for unit testing,
*
* @author Ran Tavory (r...@outbain.com)
*
*/
public class InProcessCassandraServer implements Runnable {
private static final Logger log =
LoggerFactory.getLogger(InProcessCassandraServer.class);
CassandraDaemon cassandraDaemon;
> -Jonathan
>
> On Mon, Jan 11, 2010 at 3:01 PM, Ran Tavory wrote:
> > The front page http://incubator.apache.org/cassandra/ states that
> "Cassandra
> > guarantees reads and writes to be atomic within a single ColumnFamily."
> > What exactly does that mean,
rrect?
On Mon, Jan 11, 2010 at 11:01 PM, Ran Tavory wrote:
> The front page http://incubator.apache.org/cassandra/ states that
> "Cassandra guarantees reads and writes to be atomic within a single
> ColumnFamily."
> What exactly does that mean, and where can I learn more
The front page http://incubator.apache.org/cassandra/ states that "Cassandra
guarantees reads and writes to be atomic within a single ColumnFamily."
What exactly does that mean, and where can I learn more about this?
It sounds like it means that batch_insert() and batch_mutate() for two
different r
Does cassandra/thrift support asynchronous IO calls?
Is this planned for an upcoming release?
22, 2009 at 9:10 AM, Ran Tavory wrote:
> > Not at expert in this field, but I think what you want is use a
> connection
> > pool and NOT close the connections - reuse them. Only idle connections
> are
> > released after, say 1sec. Also, with a connection pool it's easy
c...
>
> Thanks
>
> On Tue, Dec 22, 2009 at 2:55 PM, Ran Tavory wrote:
>
>> I don't have a 0.5.0-beta2 version, no. It's not too difficult to add it,
>> but I haven't done so myself, I'm using 0.4.2
>>
>>
>> On Tue, Dec 22,
I don't have a 0.5.0-beta2 version, no. It's not too difficult to add it,
but I haven't done so myself, I'm using 0.4.2
On Tue, Dec 22, 2009 at 2:42 PM, Richard Grossman wrote:
> Yes of course but do you have updated to cassandra 0.5.0-beta2 ?
>
>
> On Tue, Dec
Would connection pooling work for you?
This Java client http://code.google.com/p/cassandra-java-client/ has
connection pooling.
I haven't put the client under stress yet so I can't testify, but this may
be a good solution for you
On Tue, Dec 22, 2009 at 2:22 PM, Richard Grossman wrote:
> I agree
As we're designing our systems for a move from mysql to Cassandra we're
considering moving our file storage to Cassandra as well. Is this wise?
We're currently using mogilefs to store media items (images) of average size
of 30Mb (400k images, and growing). Cassandra looks like a performance
improv
then?
On Mon, Dec 7, 2009 at 12:34 AM, Kelvin Kakugawa wrote:
> Cassandra, right now, doesn't use vector clocks internally. However,
> an implementation is being worked on, here:
> https://issues.apache.org/jira/browse/CASSANDRA-580
>
> -Kelvin
>
> On Sun, Dec 6,
As a Cassandra newbe, after having read the Dynamo paper, I was wondering -
how does Cassandra use timestamps?
- Does it use them internally to resolve conflicts?
- Does it expose vector clocks to clients when internal conflict resolution
fails?
Thanks
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