datastax Questions
2
I am getting Cassandra timeouts using the Phantom-DSL with the Datastax Cassandra driver. However, Cassandra does not seem to be overloaded. Below is the exception I get:
com.datastax.driver.core....
Wanting asked 10/3, 2017 at 0:55
2
I have a table as below
CREATE TABLE test (
day int,
id varchar,
start int,
action varchar,
PRIMARY KEY((day),start,id)
);
I want to run this query
Select * from test where day=1 and sta...
Palmapalmaceous asked 3/3, 2017 at 10:18
2
It looks like keyspace replication is not happening correctly in my Cassandra setup, I need some ideas in troubleshooting this. I have configured multi datacenter cluster but to begin with I have s...
4
Solved
I have an old column family which has a column named "value" which was defined as a blob data type. This column usually holds two numbers separated with an underscore, like "421_2".
When im using...
2
Solved
I'm trying datastax enterprise 4.8.4 on ubuntu. Installation is OK following the instructions. I can start a cassandra node with the command sudo service dse start. Then I want to try restart as a ...
2
I've got a Cassandra cluster (3 nodes, all nodes deployed to AWS) that I am trying to migrate over to a DataStax cluster. It's simply time to stop managing these nodes myself.
I have multiple prod...
Piebald asked 27/1, 2017 at 19:48
2
Solved
I am trying to calculate the the partition size for each row in a table with arbitrary amount of columns and types using a formula from the Datastax Academy Data Modeling Course.
In order to do th...
1
I have 6 nodes, 1 Solr, 5 Spark nodes, using datastax. My cluster is on a similar server to Amazon EC2, with EBS volume. Each node has 3 EBS volumes, which compose a logical data disk using LVM. In...
Balls asked 26/9, 2016 at 9:28
1
I'm following the Cassandra java object mapper tutorial on Datastax website.
and while defining accessors
@Query("SELECT * FROM testks.user ")
Result<User> getAll();
running this query gi...
3
Solved
If I am not wrong, one can connect to a Cassandra cluster knowing at least one of the nodes that is in the cluster, and then the others can be discovered.
Lets say I have three nodes (1, 2 and 3)...
2
Solved
What happens when all seed nodes in Cassandra are down? Can new nodes join the cluster at that point ?
Hedjaz asked 9/11, 2016 at 14:47
4
Solved
While doing a bulk load of data, incrementing counters based on log data, I am encountering a timeout exception. Im using the Datastax 2.0-rc2 java driver.
Is this an issue with the server not bei...
1
Solved
I am running a simple python(3.4.3) flask app on amazon linux, which uses datastax cassandra-driver(3.6). My application is failing to import the module.
Traceback (most recent call last):
...
Christianity asked 26/10, 2016 at 8:55
4
Solved
I have a date column in a Cassandra column family. When I retrieve data from this CF using datastax java API, this date object can be taken as a java.util.Date object.
It has a getYear() method bu...
Fullblown asked 15/12, 2014 at 17:48
2
I have set the following.
rpc_address to external public ip.
Listen Address : internal ip address (not the local host),
rpc_broad_cast: internal ip address
On Dev center, I am using external ip ...
Unseat asked 2/4, 2016 at 7:47
3
I have a doubt when i read datastax documentation about cassandra write consistency. I have a question on how cassandra will maintain consistent state on following scenario:
Write consistency lev...
Crybaby asked 13/2, 2014 at 7:15
2
I have a field cat_to_pub with type as MAP.
{1: '9-20-21', 2: '2-5-21', 4: '2-5-21', 5: '2', 6: '2', 9: '2-83-153-149', 11: '2-5-21-31', 29: '100', 32: '113-198-21'}
I can delete an individual e...
Linderman asked 7/5, 2015 at 14:4
2
Solved
I get bulk write request for let say some 20 keys from client.
I can either write them to C* in one batch or write them individually in async way and wait on future to get them completed.
Writing ...
Hydrostatic asked 13/8, 2016 at 10:49
3
I tried setting up a 2 node Cassandra setup and it's quite done. Nodes are seems connected as shown below :
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/J...
Celiotomy asked 8/8, 2015 at 14:45
1
We have developed custom and proprietary Software for Route Optimization,
using Neo4J as our Graph DB. We also developed few plugins and unmanaged Extensions in Java, that implement specific Busine...
Zabrine asked 28/7, 2016 at 20:52
1
Solved
I have read over several documents regarding the Cassandra commit log and, to me, there is conflicting information regarding this "structure(s)". The diagram shows that when a write occurs, Cassand...
1
How to list all
materialized view tables
in Cassandra CQL
[cqlsh 5.0.1 | Cassandra 3.0.7.1158 | DSE 5.0.0 | CQL spec 3.4.0 |
Native protocol v4]
3
Solved
I am trying to use the datastax java driver to update and query a column family that has a map field. Does anyone an example about how to use cql collections with the Datastax Java Driver?
Thanks
...
Miculek asked 3/12, 2013 at 13:22
2
I have "commitlog_segment_size_in_mb: 32" in the cassandra settings but the error below indicates maximum size is 16777216, which is about 16mb. Am I looking at the correct setting for fixing the e...
1
Through ops-center and nodetool cfstats i was able to find that one of the partitions of a keyspace table is 560 Mb, but couldn't find out which partition is that. How can we trace which partition ...
Iaea asked 19/5, 2016 at 4:13
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