Hello,
If I have a cql3 table like this (I don't have a table with this data -
this is just for example):
create table (
surname text,
city text,
country text,
event_id timeuuid,
data text,
PRIMARY KEY ((surname, city, country),event_id));
there is no way of (easily) gett
What about using quad core athlon x4 740 3.2 GHz with 8gb of ram and 256gb
ssds?
I know it will depend on our workload but will be better than a dual core
CPU. I think
Jabbar Azam
On 13 Apr 2013 01:05, "Edward Capriolo" wrote:
> Duel core not the greatest you might run into GC issues before
OK, trying out 1.2.4. The previous issue seems to be fine, but I am
experiencing a new one:
cqlsh:location> create table test_y (message_id timeuuid, name text,
PRIMARY KEY (name,message_id));
cqlsh:location> insert into test_y (message_id,name) VALUES (now(),'foo');
cqlsh:location> insert into te
Duel core not the greatest you might run into GC issues before you run out
of IO from your ssd devices. Also cassandra has other concurrency settings
that are tuned roughly around the number of processors/cores. It is not
uncommon to see 4-6 cores of cpu (600 % in top dealing with young gen
garbage
It seems like you have a few concepts about consistency levels and
replication confused. It might be more useful to do some background
reading first:
- http://www.datastax.com/docs/1.2/cluster_architecture/data_distribution
-
http://www.datastax.com/docs/1.2/cluster_architecture/about_client_requ
Hi All,
I don't have any experience with Cassandra but we are about to evaluate it for
one of our project and a few questions had came up, namely:--Let say we
have replica set with 9 nodes. There is a write with consistency 1 and
replication "majority", so 5 nodes will get the data (sa
On Fri, Apr 12, 2013 at 1:12 PM, Dane Miller wrote:
> I'm seeing hinted handoff kick in on all our nodes during periods of
> high activity, but all the nodes seem to be up (according to the logs
> and nodetool status). The pattern in the logs is something like this:
>
> 18:10:45 194 READ messages
I'm seeing hinted handoff kick in on all our nodes during periods of
high activity, but all the nodes seem to be up (according to the logs
and nodetool status). The pattern in the logs is something like this:
18:10:45 194 READ messages dropped in last 5000ms
18:11:10 Started hinted handoff for ho
Jonathan,
I'm a bit puzzled. I had planned to attend Cassandra's major conference in
the summer but then the NYC* conference was announced. I spoke with
DataStax and was told that there was no summer conference this year and
that NYC* was all there was. So, I spent my conference time/budget on i
Hi All,
I was wondering if Cassandra is registered for a ECCN (Export Control
Classification Number) with the US Federal Government for
export/distribution purposes. It doesn't seem to be in the matrix with
other Apache projects (http://www.apache.org/licenses/exports/#matrix), but
I didn't know
That's my guess. My colleague is still looking at CPU's so I'm hoping he
can get quad core CPU's for the servers.
Thanks
Jabbar Azam
On 12 April 2013 16:48, Colin Blower wrote:
> If you have not seen it already, checkout the Netflix blog post on their
> performance testing of AWS SSD instanc
If you have not seen it already, checkout the Netflix blog post on their
performance testing of AWS SSD instances.
http://techblog.netflix.com/2012/07/benchmarking-high-performance-io-with.html
My guess, based on very little experience, is that you will be CPU bound.
On 04/12/2013 03:05 AM, Jabb
Hi all,
Last year's Summit saw fantastic talks [1] and over 800 attendees.
The feedback was enthusiastic; the most commonly requested improvement
was to extend it to two days.
We're pleased to deliver just that for 2013! This year's Cassandra
Summit will be at Fort Mason in San Francisco, Califo
Adeel,
It may be a problem in the remote node, could you check the system.log?
Also you might want to check the rpc_timeout_in_ms in both nodes, maybe an
increase in this parameter helps.
On Fri, Apr 12, 2013 at 9:17 AM, wrote:
> Hi,
>
> I have started repair on newly added node with -pr a
Thanks Marcus,
So, at this moment I have to wait until release of version 1.2.5 to be
able to extend the cluster ... I haven't seen mention any workaround ...
Thanks,
Gabi
On 4/12/13 11:11 AM, Marcus Eriksson wrote:
looks very similar to this:
https://issues.apache.org/jira/browse/CASSANDRA-5
This issue describes the design of the arena allocation of memtabes.
https://issues.apache.org/jira/browse/CASSANDRA-2252
On Fri, Apr 12, 2013 at 1:35 AM, Viktor Jevdokimov <
viktor.jevdoki...@adform.com> wrote:
> Memtables resides in heap, write rate impacts GC, more writes - more
> frequent an
The YCSB client is not very advanced. Hector, asynax or the native driver
will work better. There are a few ycsb forks as each nosql person usually
needs to fork ycsb to get the most out of it, check github.
On Thu, Apr 11, 2013 at 6:28 PM, Rodrigo Felix <
rodrigofelixdealme...@gmail.com> wrote:
You are correct. In CQL the timestamps come from the server unless
specified. In thrift the user must supply, otherwise it is always 0.
On Fri, Apr 12, 2013 at 9:20 AM, Michael Theroux wrote:
> Hello,
>
> We are having an odd sporadic issue that I believe maybe due to time
> synchronization. Wi
Your best bet is to switch to RandomPartitioner. Otherwise you have to
patch or wait until astynax catches up.
On Fri, Apr 12, 2013 at 9:42 AM, Keith Wright wrote:
> Hi all,
>
> I am trying to use Astyanax 1.56.37 to connect to C* 1.2.3 using
> murmur3 and Vnodes and I am consistently getti
Lanny,
We will try that.
Thanks a lot
On Thu, Apr 11, 2013 at 11:13 PM, Lanny Ripple wrote:
> Saw this in earlier versions. Our workaround was disable; drain; snap;
> shutdown; delete; link from snap; restart;
>
> -ljr
>
> On Apr 11, 2013, at 9:45, wrote:
>
> I have formulated the followin
Hi all,
I am trying to use Astyanax 1.56.37 to connect to C* 1.2.3 using murmur3
and Vnodes and I am consistently getting NoAvailableHostsExceptions. I found
the following thread which seems to indicate that the issue is due to Cassandra
not properly communicating the ring info to Astyanax
Hello,
We are having an odd sporadic issue that I believe maybe due to time
synchronization. Without going into details on the issue right now, quick
question, from the documentation I see numerous references that Cassandra
utilizes timestamps generated by the clients to determine write serial
Hi,
I have started repair on newly added node with -pr and this nodes
exist on another data center. I have 5MB internet connection and
configured setstreamthroughput 1. After some time repair goes hang and
following meesage found in logs;
# /opt/apache-cassandra-1.1.4/bin/nodetool -h loca
Hmmm, what is the recommendation for a 10G network if 1G was 300G to
500GŠI am guessing I can't do 10 times that, correct? But maybe I could
squeak out 600G to 1T?
Thanks,
Dean
On 4/11/13 2:26 PM, "aaron morton" wrote:
>> The data will be huge, I am estimating 4-6 TB per server. I know this
>>
Hi,
let me ask a related question. Is it planned to support passing InputStream
or Guava's InputSupplier/ByteSource to BoundStatement to make
it possible to take advantage of new native transport's streaming?
p.s. the new driver looks cool, but I haven't tried it yet.
Mikhail.
Hello,
I'm going to be building a 20 node cassandra cluster in one datacentre. The
spec of the servers will roughly be dual core Celeron CPU, 256 GB SSD, 16GB
RAM and two nics.
Has anybody done any performance testing with this setup or have any
gotcha's I should be aware of wrt to the hardware?
Hi Aaron,
Thanks for your reply! I've checked with release note,
the patch has applied in 1.2.3. If upgrade from 1.1.0 to
1.2.3, any data migration or other efforts?
looks very similar to this:
https://issues.apache.org/jira/browse/CASSANDRA-5418
/Marcus
On Fri, Apr 12, 2013 at 9:12 AM, Gabriel Ciuloaica wrote:
> Hi,
>
> From yesterday, I'm trying to add a new node to an existing 3 nodes
> Cassandra cluster, running version 1.2.3. Today I have started clea
I would replicate your different keyspaces to different DCs and scale those
appropriately
So, for example, HighLoad KS replicates to really-huge-dc, which would have, 10
nodes, LowerLoad KS replicates to smaller-dc with 5 nodes.
The idea is , you do not mix your different keyspaces in the same da
On 2013-04-11 22:10, aaron morton wrote:
Is it guaranteed that the rows are grouped by the value of the
partition key? That is, is it guaranteed that I'll get
Your primary key (k1, k2) is considered in type parts (partition_key ,
grouping_columns). In your case the primary_key is key and the gro
Hi,
From yesterday, I'm trying to add a new node to an existing 3 nodes
Cassandra cluster, running version 1.2.3. Today I have started clean,
removed the node that I have tried to add yesterday and try to add
another node. Verified both cassandra.yaml and
cassandra-topology.properties are id
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