I posted a real life example how we used cassandra to store data for a
facebook chat like application. Check it out at
http://www.juhonkoti.net/2010/09/25/example-how-to-model-your-data-into-nosql-with-cassandra
- Juho Mäkinen
On Mon, Oct 4, 2010 at 7:04 PM, Petr Odut wrote:
> http://wiki.apach
Sure looks like you changed a standard CF definition to super by mistake.
On Sun, Oct 3, 2010 at 10:51 PM, Aaron Morton wrote:
> I got this error on my 0.7.0beta2 install, upgraded from the 0.70 nightly
> 31/08. If you think it's just bad data let me know.
> Mu cluster had some tombstone records
http://wiki.apache.org/cassandra/UseCases
On Mon, Oct 4, 2010 at 5:56 PM, Himanshu Jani wrote:
> Hello all,
>
> I am here with a very basic question.
> I am very new to Cassandra slowly migrating from RDBMS world. Is there any
> worked example that I can use it to learn Cassandra? I have lots of
Did you see twissandra linked from
http://wiki.apache.org/cassandra/ArticlesAndPresentations ?
(Twissandra is targetted at 0.7 now, btw.)
On Mon, Oct 4, 2010 at 10:56 AM, Himanshu Jani wrote:
> Hello all,
>
> I am here with a very basic question.
> I am very new to Cassandra slowly migrating fro
https://issues.apache.org/jira/browse/CASSANDRA-1571
On Fri, Oct 1, 2010 at 3:41 PM, Jonathan Ellis wrote:
> Yes, this is a bug. Can you create a ticket?
>
> On Fri, Oct 1, 2010 at 4:02 AM, Petr Odut wrote:
> > Hi,
> > I have CF User with secondary index on "email" column.
> > When I remove a
Hello all,
I am here with a very basic question.
I am very new to Cassandra slowly migrating from RDBMS world. Is there any
worked example that I can use it to learn Cassandra? I have lots of
documentation around Cassandra but any simple worked example will be of
great help in understanding Cassan
partly good news, thanks
Petr Odut
On Mon, Oct 4, 2010 at 5:40 PM, Jonathan Ellis wrote:
> Yes, but probably not in 0.7.0.
>
> On Sun, Oct 3, 2010 at 12:08 PM, Petr Odut wrote:
> > Thanks for the info. Will be ever possible to going throught a secondary
> > index (since SI is sorted by default
Yes, but probably not in 0.7.0.
On Sun, Oct 3, 2010 at 12:08 PM, Petr Odut wrote:
> Thanks for the info. Will be ever possible to going throught a secondary
> index (since SI is sorted by default)? My use case is to display newest
> comments, users, etc. SI from my point of view perfectly fits he
Thanks, I just pushed ahead with the rolling upgrade with bootstrap
off. This just meant the beta1 cluster got smaller and dissappeared
while the beta2 cluster got bigger and took over.
This is only a dev system so no writes will/should have been lost.
Ian
On 04/10/2010 14:55, Jonathan Ell
It should work this way:
1. Move your data to the new node (scp, etc.)
2. Make sure the new node is configured to use the same token as the new node.
3. Stand up the new node.
4. Turn off the old node.
If your environment is volatile, it's probably best to run `nodetool
repair` on the new node.
Hey All,
I'm planning to run Map/Reduce on one of the ColumnFamilies. The keys are
formed in such a fashion that, they are indexed in descending order by time.
So I'll be analyzing the data for every hour iteratively.
Since the current Hadoop integration does not support partial columnfamily
anal
On 4 October 2010 10:58, Utku Can Topçu wrote:
> Recently I've tried to upgrade (hw upgrade) one of the nodes in my cassandra
> cluster from ec2-small to ec2-large.
Something that bit me on this (I've done it with both
Cassandra and Hadoop boxes, and some problems
might be more Hadoopy related
Hi Peter,
Thanks again for your time and thoughts on this problem.
We think we've got a bit ahead of the problem by just
scaling back (quite savagely) on the rate that we try to
hit the cluster. Previously, with a surplus of optimism,
we were throwing very big Hadoop jobs at Cassandra,
in
What I can understand from "behaving like a deleted" column is
- They'll be there for at most GCGraceSeconds?
On Mon, Oct 4, 2010 at 3:51 PM, Jonathan Ellis wrote:
> Expiring columns are 0.7 only.
>
> An expired column behaves like a deleted column until it is compacted away.
>
> On Mon, Oct 4,
A simpler approach might be to insert expiring columns into a 2nd CF
with a TTL of one hour.
On Mon, Oct 4, 2010 at 5:12 AM, Utku Can Topçu wrote:
> Hey All,
>
> I'm planning to run Map/Reduce on one of the ColumnFamilies. The keys are
> formed in such a fashion that, they are indexed in descendi
Thanks guys,
In the end I don't know what solved it, I had changed too much code to know
for sure and too many other things at the same time. I did however find
tcpdump useful as a debug tool as the error messages don't always seem to
make it back up the stack into php. I could read them in plain
from the Upgrading section of NEWS.txt:
The Cassandra inter-node protocol is incompatible with 0.6.x
releases (and with 0.7 beta1), meaning you will have to bring your
cluster down prior to upgrading
On Mon, Oct 4, 2010 at 8:53 AM, Ian Rogers wrote:
>
> I've tried to do a rolling upg
Hey All,
Recently I've tried to upgrade (hw upgrade) one of the nodes in my cassandra
cluster from ec2-small to ec2-large.
However, there were problems and since the IP of the new instance was
different from the previous instance. The other nodes didnot recognize it in
the ring.
So what should b
I've tried to do a rolling upgrade of a 3-node ring from beta1 to beta2
but got the error below. The new node seems to come up fine - I can
connect to it with cassandra-cli and see the keyspaces - but it doesn't
join the ring.
My method was:
- stop old cassandra
- mv old cassandra dir to new p
Expiring columns are 0.7 only.
An expired column behaves like a deleted column until it is compacted away.
On Mon, Oct 4, 2010 at 8:48 AM, Utku Can Topçu wrote:
> Hi Jonathan,
>
> Thank you for mentioning about the expiring columns issue. I didn't know
> that it had existed.
> That's really grea
Hi Jonathan,
Thank you for mentioning about the expiring columns issue. I didn't know
that it had existed.
That's really great news.
First of all, does the current 0.6 branch support it? If not so, is the
patch available for the 0.6.5 somehow?
And about the deletion issue, if all the columns in a
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