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Questions tagged [datastax]

DataStax Enterprise is big data platform consisting of open source tools such as Apache, Cassandra, Solr and Hadoop (and several others).

DataStax Astra simplifies cloud-native application development, and reduces time to deploy Apache Cassandra and scale from days to minutes. DataStax Astra eliminates the operational overhead of using Apache Cassandra, the open-source NoSQL database behind the largest applications in the world. Learn more on datastax.com/dev about new APIs for REST, schemaless document-style JSON, and GraphQL APIs for Cassandra - available with the Astra cloud service and stargate.io for standalone Cassandra.

For those who prefer self-managed technology, DataStax Enterprise (DSE) is a big data platform that provides a version of Cassandra enhanced with enterprise security features and that adds support for more workload types such as graph, search, and analytics. DataStax Enterprise enables companies to build transformational data architectures for applications, microservices and experiences that require data sovereignty, availability, scale, agility, and accessibility by any user.

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In datastax cassandra 5.1, why is dsetool missing insights_config command?

running dsetool insights_config on the DataStax Cassandra node returns Unknown command: insights_config whereas the documentation states that this command should be present.
rajat
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Does spark-cassandra-connector support built-in load balanceing?

I have Scala-based application and I need to connect it to Cassandra. I found DataStax Enterprise drivers very useful in this regard, and those have a lot of cool features like in-built load balancing for Cassandra and that is really import for…
Kian
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Cassandra Node Capacity Calculation

I am trying to find out what is a data holding capacity of each Cassandra node in a Cluster before it starts showing latency. Basically I need to find out what is the right time to start adding new nodes to the existing cluster. I am referring to…
user1401472
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Cassandra doesn't start in windows with directory being auto falgged as READ-ONLY

[Please reopen this post] I am trying to set up Cassandra in my Windows 7 machine, when I run cassandra -f command as administrator in command console, I received the following error: org.apache.cassandra.io.FSReadError: java.io.IOException:…
mdivk
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Can I user counter type field as primary key of my C* table?

When I am trying to create table like below create table if not exists counter_temp(id counter PRIMARY KEY , comment text); It is giving error as below Multiple markers at this line For a table with counter columns, all columns except the…
BdEngineer
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Experiencing token configuration exceptions when restart cassandra node

Recently I restart one of the cassandra node (which is a seed node) and got following errors, the weird thing is that previously I start the cluster with token set to be 256, now I'm getting a "cannot change token from 512 to 256" error. DEBUG…
disccip
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java.sql.SQLException: Io exception: NL Exception was generated

I am using spark-sql 2.4.1 while I am trying to connect the oracle db using my spark program Spark Program val o_url =//"jdbc:oracle:thin: etc ... it is correct and working val query ="( SELECT 1 FROM DUAL ) T"; val dfReader =…
BdEngineer
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Implement tables get all records has multiple tag in Cassandra database

In Cassandra database, I have videos and tags, and every video can have multiple tags. With below structure I can get videos has one specific tag: CREATE TABLE VIDEOS_BY_TAG ( tag text, video_id uuid, added_date timestamp, primary key…
mohsen shafiei
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Build DataStax Distribution of Apache Cassandra

I downloaded DataStax Distribution of Apache Cassandra (DDAC) from this page. nodetool.bat runs cassandra.in.bat, cassandra.in.bat in one of the statements requires "%CASSANDRA_HOME%\build folder. However, this build folder does not exist in the…
Adam Shakhabov
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Pyspark : Writing data frame into Cassandra table is not working

When I tried to read the data from Cassandra table through pyspark is working fine. But when I tried to writing the Dataframe into Cassandra table is giving the java.lang.NoClassDefFoundError with same Spark-Cassandra connecting packages. Versions…
Karthikeyan Rasipalayam Durai
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Issues with Cassandra Read Performance

I have an C# application (Datastax driver) which is focused on Casandra data retrieval. One of the major issues with this is that with increase in volume, the asynchronous reads take more than 60 seconds to respond and that leads to timeouts in the…
Sitakant Mishra
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Cassandra CommitLog Directory Forgetting To Remove Files

Version: DSE 6.7.5, CQL spec 3.4.5. I have 8GB commitlog_total_space_in_mb. Folder is currently at 13GB. Looking at the date stamps in the folder it appears that it forgets about commitlogs or it may be failing to delete the commitlogs when it…
ZeroPoints
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Can't start Cassandra server with public IP(Port 7000 error)

I'm seting up cassandra server on centos 6.8 and change to public IP by using https://stackoverflow.com/a/17164723/10206109 method but it stuck when start server with cassandra -f -R and I got this error: ERROR [main] 2019-09-10 11:42:31,684…
Seaty Sw
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stucked compaction of Opscenter.rollup_state table

we just added new second DC to our cassandra cluster with 7 nodes (per 5 jbods SSD), and after replication of the new DC we got periodical stucked compactions of Opscenter.rollup_state table. When this happens node goes to down state for other but…
mrbee
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issue with multiple data directory in cassandra

We have used multiple data directories in cassandra on EC2. One of the volume of data directory become 100 % full where as otherone was 30% empty. Post that a lot of writes got failed and eventually cassandra stopped. I debugged and realised my…
Naresh
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