.
On Fri, Feb 28, 2014 at 11:09 AM, Ondřej Černoš wrote:
> Hello,
>
> we are trying to add authentication to our Cassandra cluster. We add our
> authenticated users during puppet deployment using the default user, which
> is then disabled.
>
> We have the following
Hello,
we are trying to add authentication to our Cassandra cluster. We add our
authenticated users during puppet deployment using the default user, which
is then disabled.
We have the following issues:
- we see CorruptSSTableException in system_auth.users table
- we are not able to add users af
th Cassandra in our
> testing. There are a number of changes going in soon that may change that,
> but for the time being it is advisable to stick with CMS. With tuning you
> can no doubt bring your pauses down considerably.
>
>
> On 17 February 2014 10:17, Ondřej Černoš wrote:
&
Hi all,
we are seeing the same kind of long pauses in Cassandra. We tried to switch
CMS to G1 without positive result. The stress test is read heavy, 2
datacenters, 6 nodes, 400reqs/sec on one datacenter. We see spikes in
latency on 99.99 percentil and higher, caused by threads being stopped in
JV
left in system keyspace as live though the keyspace was
completely dropped?
ondrej cernos
On Thu, Feb 6, 2014 at 3:11 PM, Ondřej Černoš wrote:
> I ran nodetool scrub on nodes in the less corrupted datacenter and tried
> nodetool rebuild from this datacenter.
>
> This is the result:
at 2:38 PM, Ondřej Černoš wrote:
> Hi,
>
> I am running a small 2 DC cluster of 3 nodes (each DC). I use 3 replicas
> in both DCs (all 6 nodes have everything) on Cassandra 1.2.11. I populated
> the cluster via cqlsh pipelined with a series of inserts. I use the cluster
> for
Hi,
I am running a small 2 DC cluster of 3 nodes (each DC). I use 3 replicas in
both DCs (all 6 nodes have everything) on Cassandra 1.2.11. I populated the
cluster via cqlsh pipelined with a series of inserts. I use the cluster for
tests, the dataset is pretty small (hundreds of thousands of recor
Hi,
we had a similar use case. Just do the filtering client-side, the #2
example performs horribly, secondary indexes on something dividing the set
into two roughly the same size subsets just don't work.
Give it a try on localhost with just a couple of records (150.000), you
will see.
regards,
Hi,
by the way, some of the issues are summarised here:
https://issues.apache.org/jira/browse/CASSANDRA-6586 and here:
https://issues.apache.org/jira/browse/CASSANDRA-6587.
regards,
ondrej cernos
On Tue, Jan 14, 2014 at 9:48 PM, Ondřej Černoš wrote:
> Hi,
>
> thanks for the answer
API.
> Joins and indexes should generally be handled by denormlaising the data
> during writes.
>
> It sounds like your data model was too relational, you need to denormalise
> and read rows by primary key. Secondary indexes are useful when you have a
> query pattern that is used infr
Hi all,
we are reimplementing a legacy interface of an inventory-like service
(currently built on top of mysql) on Cassandra and I thought I would share
some findings with the list. The interface semantics is given and cannot be
changed. We chose Cassandra due to its multiple datacenter capabiliti
Hi all,
I am solving a issue with pig integration with cassandra using CqlLoader. I
don't know exactly if the problem is in CqlLoader, my low understanding of
Pig (I hope this is actually the case) or some bug in the combination of
Pig and CqlLoader. Sorry if this turns out to be rather a Pig ques
Hello,
please see these issues:
https://issues.apache.org/jira/browse/CASSANDRA-5686 and
https://issues.apache.org/jira/browse/CASSANDRA-5391 if you hit any of them.
regards,
ondrej cernos
On Wed, Aug 7, 2013 at 5:00 PM, Madalina Matei wrote:
> Hi,
>
> I have a 5 nodes cassandra (version 1.1.
Hi all,
I need to support a legacy API where page offset and limit are on the input
of the API call (it used to be mapped directly to offset and limit MySQL
select options). The data are pretty small (like really small,
some hundreds of thousands narrow rows maximum - I use Cassandra for its
multi
CQL 2? Try using the -2 option when starting cqlsh.
regards,
Ondřej Černoš
On Thu, Apr 25, 2013 at 10:32 AM, wrote:
> IMHO: user_name is not a column, it is the row key. Therefore, according
> to http://thelastpickle.com/2011/07/04/Cassandra-Query-Plans/ , the row
> does not contain a
Hi,
I have similar issue with stuck repair. Similar multiregion setup, only
between us-east and private cloud at rackspace. The log mentiones merkle
tree exchanges and I see a lot of dropped communication:
I will comment on your ticket in Jira.
regards,
ondrej cernos
On Fri, Apr 19, 2013 at
Hi,
if you are able to reproduce the issue, file a ticket on
https://issues.apache.org/jira/browse/CASSANDRA - my experience is
developers respond quickly on issues that are clearly a bug.
regards,
ondrej cernos
On Thu, Apr 25, 2013 at 10:03 AM, Tamar Rosen wrote:
> Hi,
>
> We have a case of
would help.
regards,
ondřej černoš
of truncate?
regards,
Ondřej Černoš
On Thu, Apr 11, 2013 at 5:04 PM, Edward Capriolo wrote:
> If you do not have JNA truncate has to fork an 'ln -s'' command for the
> snapshots. I think that makes it un-predicatable. Truncate has its own
> timeout value now (separate
found out there were some issues with race
conditions and with slowing down if truncate is used frequently (as is my
case, where truncate is run before each test in quite a big test suite).
Any hints?
Regards,
Ondřej Černoš
of
compactions I reported in the previous email was not triggered.
And is there a documentation where I could find the exact semantics of
repair when vnodes are used (and what -pr means in such a setup) and
when run in multiple datacenter setup? I still don't quite get it.
regards,
Ondřej Č
a/browse/CASSANDRA-5381
>
> Cheers
>
> -
> Aaron Morton
> Freelance Cassandra Consultant
> New Zealand
>
> @aaronmorton
> http://www.thelastpickle.com
>
> On 26/03/2013, at 5:10 AM, Ondřej Černoš wrote:
>
> Hi all,
>
> I am still unable to move forward with t
Hi all,
I have 2 DCs, 3 nodes each, RF:3, I use local quorum for both reads and writes.
Currently I test various operational qualities of the setup.
During one of my tests - see this thread in this mailing list:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/java-io-IOException
, 2013 at 5:51 PM, Ondřej Černoš wrote:
> Hi all,
>
> I am running into strange error when bootstrapping Cassandra cluster
> in multiple datacenter setup.
>
> The setup is as follows: 3 nodes in AWS east, 3 nodes somewhere on
> Rackspace/Openstack. I use my own snitch based on
Hey,
try this blog post by Datastax, it provides a good explanation of CQL3
abstractions.
http://www.datastax.com/dev/blog/cql3-for-cassandra-experts
regards,
ondrej cernos
On Wed, Mar 20, 2013 at 8:50 AM, Thierry Templier wrote:
> Hello,
>
> I have a question regarding composite columns. Wha
Hi all,
I am running into strange error when bootstrapping Cassandra cluster
in multiple datacenter setup.
The setup is as follows: 3 nodes in AWS east, 3 nodes somewhere on
Rackspace/Openstack. I use my own snitch based on EC2MultiRegionSnitch
(it just adds some ec2 avalability zone parsing capa
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