Does anyone know what the 'memsql' database / schema does in a MemSQL database? This is the default schema that is automatically created when you start the service. There are no tables, views, or routines in it and you can't create anything on it. My best guess is that it's the equivalent of a 'Master' or 'msdb' database in SQL Server.
Talked to the guys at MemSQL and the self-named schema 'memsql' is indeed the equivalent of 'master' on SQL Server
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trying to migrate the data from oracle to cassandra i have below issues:
How to handle the errors while data migration to cassandra using spark-sql?
How to design the retry machanisum if anything fails ?
Is there any document/sample/github regarding the same.
~Sha
you can look into these below github repos for reference
https://github.com/snazy/Oracle_to_Cassandra
https://github.com/AlexGruPerm/oratocass
I have created an application from jhipster which is microservice based. I have gateway registry and application which is running on MySql database. Now I want to migrate from MySQL to Cassandra database. Can you please let me know the changes I need to make in java/class files and list of file. So far I made some changes like application-dev yml. I have this application on hibernate, ehcache etc. Changed the class name in cacheconfiguration.java. Please let me know anyother changes required to run on database.
Regards
Satyanvesh
You can use the same Java POJO classes to annotate with Spring-Cassandra or datastax Cassandra annotations. If you want to migrate your data as well export your data tables as csv from MySQL and use the COPY command in cql to copy from csv to Cassandra.
I am setting up a 2 node cluster of couchdb, but I am unable to figure out how can we do a master-master replication of all databases automatically.
We have thousands of databases that needs to be replicate across the nodes, because we are using couch pouch synching mechanism per user basis. (One database per user)
Thanks in advance.
As far as I know, there is no mechanism like this. You may write your own script for starting replication for each DB in _all_dbs
I am using Weblogic 12c in a cluster environment,
I am using Cassandra for database operations.
My requirement is to execute a batch which picks up records from DB, process them and upload to a webservice.
For this I am looking at Quartz JDBCJobStore implementation.
For normal sql database we can achieve it by JDBC JobStore
However I am struggling to get on how to implement on Cassandra
I want to create JDBC JobStore for NoSQL database like Cassandra
Any help would be great on this.
It would be helpful if some example implementation of quartz.properties and table script is given
Update: This delivers an answer for a SQL DB. I want the same for NoSQL DB
I am new to cassandra,
I have more than 10 years experience of working with mysql and sql server and it makes my job harder to transfer to nosql databases.
As you know sql databases provide very user friendly workbrench for working with them.
But the only thing that I found for cassandra was datastax and I am not even sure if I can even create nodes and colloections in a visualize way and not by command line. Is it possible to do such a thing in cassandra ?
You can use OpsCenter and DevCenter, both from DataStax. OpsCenter lets you do operations-centric tasks, while DevCenter lets you perform developer-centric tasks.