Hey Rajesh,
For better response put this question in Datastax support forum *
http://www.datastax.com/support-forums/forum/datastax-enterprise*
Regards,
Abhijit
Hi Jakub,
Were you able to resolve the issue?
For a multi data center setup I do believe some steps are different. You may
need to set Networktopology as your replication strategy rather than simple
strategy, and setup a snitch. And mention the rack/dc configurations in a
config file.
You can
Hi,
I know that changing a CF's comparator is not officially supported.
However, there is a post by Jonathan Ellis that implies it can be done
(www.mail-archive.com/user@cassandra.apache.org/msg09502.html).
I assume that we'd have to change entries in the system.schema_* column
families.
Christof ,
can't you just use ASSUME for the CQL session?
http://www.datastax.com/docs/1.0/references/cql/ASSUME
Regards,
Roshni
On 03/08/12 2:26 PM, Christof Roduner chris...@scandit.com wrote:
Hi,
I know that changing a CF's comparator is not officially supported.
However, there is a
I think the 1.0.6 nodes can't join (on a restart, for example) the
ring in a mixed cluster. So you can either continue the rolling
upgrade, or if you want to keep running in mixed mode (why?) you can
use 1.0.11 for the older ones, but you won't be able to do schema
migrations.
-- Omid
On Fri,
Hi Roshni,
Thanks for your reply. As far as I know, ASSUME is only for cqlsh and
not for CQL in general. (We can of course achieve the same by
programmatically setting the encoding. It would be just simpler to let
the CQL driver take care of it...)
Regards,
Christof
On 8/3/2012 11:31 AM,
Hi Roshni,
I was just about to summarize. I got it running.
The problem eventually was the firewall. I didn't have the full control
over the server so I couldn't check the iptables rules.
The incoming traffic on 7000 port was rejected on the second node. I've
just checked one way communication
Hello,
I am using a Column Family in Cassandra to store incoming messages, which
arrive at a high rate (100s of thousands per second). I then have a process
wake up periodically to work on those messages, and then delete them. I'd like
to understand how I could have multiple processes running,
If you are deleting the messages after processing, it sounds like you
are using Cassandra as a work queue.
Here are some links for implementing a distributed queue in Cassandra:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Distributed-work-queues-td5226248.html
Brian -- thanks.
We were looking to do the same thing, but in the end decided
to go with Kafka.
Given your throughput requirements, Kafka might be a good
option for you as well.
This might be off-topic, so I'll keep it short. Kafka is reasonably stable?
Mature (I see it's in the Incubator)?
Kafka is relatively stable and has a active well-supported news-group as
well.
As discussed by Brian, you would be inverting the paradigm of
store-process. Essentially in your original approach, you are storing the
messages first and then processing them after the fact. In the Kafka model,
you
On Thu, Aug 2, 2012 at 6:14 AM, Romain HARDOUIN
romain.hardo...@urssaf.frwrote:
Then http://www.datastax.com/docs/1.1/operations/backup_restore should
mention it :-)
I opened a ticket with our docs team to cover that. Thanks!
--
Tyler Hobbs
DataStax http://datastax.com/
Nobody use Leveled Compaction with CQL 3.0 ?
-Z
On Tue, Jul 31, 2012 at 11:17 AM, Data Craftsman 木匠
database.crafts...@gmail.com wrote:
Sorry for my stupid simple question. How to create a COLUMNFAMILY with
Leveled Compaction?
There is no example in documentation:
Hi all,
I'm testing our procedures for handling some Cassandra failure scenarios
and I'm not understanding something.
I'm testing on a 3 node cluster with a replication_factor of 3.
I stopped one of the nodes for 5 or so minutes and run some application
tests. Everything was fine.
Then I
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