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CASSANDRA QUESTIONS

How to implement trigger in Cassandra?
How to implement trigger in Cassandra?
seems to work fine You can add mutations to manipulate other rows into the collection of mutations like in the example.Both it and CDC do not have a whole lot of documentation around it because its generally recommended not to use them unless really
TAG : cassandra
Date : November 20 2020, 03:01 PM , By : Darren Canty
Is Leveled Compaction Strategy still beneficial for reads when Rows Are Write-Once?
Is Leveled Compaction Strategy still beneficial for reads when Rows Are Write-Once?
will help you When the rows are written strictly once, there is no effect of choosing LeveledCompactionStrategy over SizeTieredCompactionStrategy, regarding read performance (there are other effects, e.g. LCS requires more IO)Regarding the below comm
TAG : cassandra
Date : November 02 2020, 03:01 PM , By : Jide
Is it possible to have external trigger in Cassandra?
Is it possible to have external trigger in Cassandra?
Any of those help There are two features, triggers and CDC (change data capture) that may work. You can create a trigger to receive updates and execute the http request, or you can use CDC to get a per replica copy of the mutations as a log to walk t
TAG : cassandra
Date : October 30 2020, 04:01 PM , By : princyam
manually removing sstables and associated files
manually removing sstables and associated files
seems to work fine If you are allowed to restart the node (this is usually fine, Cassandra focuses on high availability, and temporary unavailability of a single node is its bread and butter), the safest thing would be to shut down Cassandra on one n
TAG : cassandra
Date : October 24 2020, 08:10 AM , By : user2172275
what are the difference between the data back up using nodetool and cqlsh copy command?
what are the difference between the data back up using nodetool and cqlsh copy command?
should help you out Currently we have two options to take data back up of the tables in a Cassandra keyspace. We can either user nodetool commands or use the copy command from the cqlsh terminal. , GREAT question!
TAG : cassandra
Date : October 22 2020, 08:10 PM , By : Akshay SHarma
Why is CQL allowing inequality operators with partition key?
Why is CQL allowing inequality operators with partition key?
hope this fix your issue The partition key is in token order so things like > require reading the entire data set from all replica sets, filtering out things dont match. This is horribly inefficient and expensive (which is why ALLOW FILTERING is requ
TAG : cassandra
Date : October 20 2020, 08:10 PM , By : user2173485
Cassandra: is it possible to prohibit USE and DESCRIBE on a specific keyspaces
Cassandra: is it possible to prohibit USE and DESCRIBE on a specific keyspaces
will be helpful for those in need I want to prohibit a non super role (or a specific role) to use the command 'USE' and 'DESCRIBE' on a specific keyspace. I found nothing about it .. , You can block read or write access to a keyspace with
TAG : cassandra
Date : October 19 2020, 08:10 AM , By : Allan
How to get rid of the below message in cassandra logs?
How to get rid of the below message in cassandra logs?
around this issue I have recently upgraded datastax-enterprise from 4.8.16 to 5.0.15. We are using password authentication in PlainText format. But below message is continuously coming in logs. , You need to set:
TAG : cassandra
Date : October 14 2020, 02:21 PM , By : Vijin
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