After looking at the cassandra code a little, I believe this is not really an
issue.
After the upgrade to 1.2, we still see the issue described in this bug I filed:
https://issues.apache.org/jira/browse/CASSANDRA-5264
The "Replicas" is calculated by adding up the effective ownership of all the
n
Hello,
We have a demo cassandra cluster (version 1.2.18) with two DCs and 4 nodes
in total. Our client is using the Datastax C# driver (version 1.2.7).
RF='DC1':2, 'DC2':2. The consistency level is set to LOCAL_QUORUM and all
traffic is coming directly from the application servers in DC1, which th
Hi Jens,
if you are going to dramatically change the number of nodes or for a lot of
high movement in tokens you might want to consider DC switching - adding a
DC, switching client, dropping old DC. You can use this also for a few
other cases like using vnodes, changing their number or even the
pa
Hi,
Is your OOM on heap or on native memory ? Since 2.1 put a lot of things on
native memory I would say that it is almost always bad to have 6 GB out of
8 for the heap (unless you have a very small data set), since in the 2 GB
remaining you have to keep bloom filters, indexes and more + Page cach
Hi Michael,
I barely can access internet right now and was not able to check outputs on
my computer, yet first thing that come to my mind is that since 1.2.x (and
vnodes) I use rather nodetool status instead. What is the "nodetool status"
output ?
Also did you try to specify the keyspace ? Since
Jonathan,
I'm pretty sure you'll have better chances to get this answered on the
Python driver mailing list
https://groups.google.com/a/lists.datastax.com/forum/#!forum/python-driver-user
On Tue, Jun 16, 2015 at 1:01 AM, Jonathan Ballet
wrote:
> Hi,
>
> I'd like to write some Python application
>
> I understood that running Spark and Solr in the same data center was not
> possible.
It was always possible, just not supported. This changed in 4.7, see the
docs:
http://docs.datastax.com/en/datastax_enterprise/4.7/datastax_enterprise/ana/dseSearchAnalyticsOverview.html
All the best,
[im
Many thanks for the clarification, I will look at DSE Search in detail
because having the option of using Solr indexes with Spark jobs is a very
interesting feature to reduce the amount of data to be collected. I
understood that running Spark and Solr in the same data center was not
possible.
Best
Yes, set the replication factor of the keyspace to only use the datacenter
you want.
More information here:
http://docs.datastax.com/en/cql/3.1/cql/cql_reference/create_keyspace_r.html
Regards,
Carlos Juzarte Rolo
Cassandra Consultant
Pythian - Love your data
rolo@pythian | Twitter: cjrolo | L
Hi,
I'm wondering if it would be possible to have a keyspace setup to replicate
only within a single datacenter, regardless of how many other datacenters
there are in the cluster.
I have a case where some machines will be at a site that needs it's
database replicated to all nodes at that site. H
Just an FYI. DSE Search does not run in its own JVM, it runs in the same JVM
that Cassandra is running in. DSE Search also has integration with Spark
map/reduce out of the box.
> On Jun 16, 2015, at 9:42 AM, Andres de la Peña wrote:
>
> Thanks for your interest.
>
> I am not familiar with
Thanks for your interest.
I am not familiar with DSE Search internals, so I can only express some
impressions. In my opinion, both projects have similarities, but there are
several key differences:
- DSE Solr, if I'm not wrong, runs in a separate JVM preserving its APIs
and interfaces, whil
If you use clustering order by and need to keep the top rows in cache, look
at the row cache in 2.1.
http://www.datastax.com/dev/blog/row-caching-in-cassandra-2-1
On Jun 16, 2015 5:39 AM, "Pracheer Agarwal"
wrote:
> Hi,
>
> We are evaluating Cassandra 2.1 for our new production system. The
> fol
Thanks Jason,
No errors in the log. Also the nodes do have a consistent schema for the
keyspace (although this was a problem during the upgrade that we resolved using
the procedure specified here:
https://wiki.apache.org/cassandra/FAQ#schema_disagreement).
-Mike
From: Jason Wee
To:
Hi,
We are evaluating Cassandra 2.1 for our new production system. The
following are the requirements:
1. 15K writes/sec with 5 KB blob in a single column of a column family,
2. This is followed by immediate Reads by multiple consumer threads, the
read requires us to return entire Row and not onl
When you alter a table the Cassandra server invalidates the prepared statements
it is holding, so when clients (like your own) execute the prepared statement
the server informs the client it needs to be re-prepared and the client does it
automatically.
If this isn’t working for you then you shou
Hi,
I'd like to write some Python applications using Twisted to talk to a
Cassandra cluster.
It seems like the Datastax Python library from
https://github.com/datastax/python-driver does support Twisted, but it's
not exactly clear how I would use this library along with Twisted. The
documen
But I'm using 2.1.6, I still get this bug. So, I should discard that
PrepareStatement when I get the alter table message? How can I get and
deal that message?
2015-06-15 16:45 GMT+08:00 Peer, Oded :
> This only applies to “select *” queries where you don’t specify the
> column names.
>
> There
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