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BIGData | NoSQL | MSSQL | MySQL | PostgreSQL
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    Cassandra Automatic Data Expiration: The Automatic Data Expiration is one of the feature of NoSQL Cassandra Database. You can set expiration time in second to expire a particular data. You can set Time to Live (ttl) value in seconds to set an expiration time. The defined TTL data are marked with a Tombstone Garbage collector […]

    0 0

    In this post, I am sharing small demonstration of Cassandra Collection data types. Basically, CQL provides three different types of collection data types, SET, LIST, MAP. Using collection data types, you can store multiple values in a single column. You can store multiple values in a single column, but try to keep your collection small […]

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    What is cassandra.yaml configuration file? The cassandra.yaml file is the main configuration file for Cassandra. This file is very important for all kinds of Cassandra node and cluster level configurations. After changing properties in the cassandra.yaml file, you must restart the node for the changes to take effect. The default location of cassandra.yaml: The default […]

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    When I was creating my first database User and Role, I got this error message in Cassandra – InvalidRequest: code=2200 [Invalid query] message=”org.apache.cassandra.auth.CassandraRoleManager doesn’t support PASSWORD”. For me, this is very important to resolve this problem because application requires different database User authentication information. I have tried many options to solve this error and I […]

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    Prior to Cassandra 2.2, It supports only User base authentication, but now Cassandra introduces new Role based authentication. In this post, I am sharing small demonstration to create a Role in Cassandra and How to assign different permissions to that role. You can directly use this Role for authentication and you can also assign same […]

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    In this post, I am sharing an important list of ports which are used by the Cassandra for different purpose. Cassandra community has to know about these ports because it is very important while they are configuring firewall for Cassandra server. 9160: Cassandra Thrift client API 9042: Cassandra native client port 7000: Cassandra Internode cluster […]

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    In this post, I am sharing a list of important CQL shell commands of the Cassandra. Get help of all commands: [crayon-5998f6962018a165123849/] Check host and version: [crayon-5998f69620191809872600/] Check cluster information: [crayon-5998f69620195829802345/] Check keyspaces: [crayon-5998f69620198403737136/] Check user defined tables: [crayon-5998f6962019b996888571/] Check user defined types: [crayon-5998f6962019e362654925/] Check consistency level: [crayon-5998f696201a1702634945/] Make your table output expanded: [crayon-5998f696201a4512210927/]

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    In this post, I am sharing an important list of Cassandra System Tables. Cassandra DBA can use these tables for a different investigation like, Schema information, Roles information, Tracing information and others. There are different keyspaces are available like, system, system_auth, system_schema, system_traces. system_auth Keyspace: [crayon-5998f6961fe06056975590/] system_schema Keyspace: [crayon-5998f6961fe0e698322091/] system_traces Keyspace: [crayon-5998f6961fe11754271431/] system Keyspace: [crayon-5998f6961fe14284538376/]

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    In this post, I am sharing basic help to execute multiple statements using one single Cassandra batch. Many times, it is required to execute multiple statements using single batch. Cassandra CQL provides the BEGIN BATCH…APPLY BATCH command to execute multiple statements. Below is a small demonstration: Create Keyspace if not exists: [crayon-5998f6961f7b7307115339/] Use a Keyspace: […]

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    In this post, I am sharing small demonstration to create CQL User Defined Data Type in Cassandra. Using user defined data types, you can handle multiple fields into one user-defined column. For example, You can create user-defined data type for Address related columns, in which you can specify a Street name, City name, Pincode, etc. […]

    0 0

    Cassandra Automatic Data Expiration: The Automatic Data Expiration is one of the feature of NoSQL Cassandra Database. You can set expiration time in second to expire a particular data. You can set Time to Live (ttl) value in seconds to set an expiration time. The defined TTL data are marked with a Tombstone Garbage collector […]

    0 0

    In this post, I am sharing small demonstration of Cassandra Collection data types. Basically, CQL provides three different types of collection data types, SET, LIST, MAP. Using collection data types, you can store multiple values in a single column. You can store multiple values in a single column, but try to keep your collection small […]

    0 0

    What is cassandra.yaml configuration file? The cassandra.yaml file is the main configuration file for Cassandra. This file is very important for all kinds of Cassandra node and cluster level configurations. After changing properties in the cassandra.yaml file, you must restart the node for the changes to take effect. The default location of cassandra.yaml: The default […]

    0 0

    When I was creating my first database User and Role, I got this error message in Cassandra – InvalidRequest: code=2200 [Invalid query] message=”org.apache.cassandra.auth.CassandraRoleManager doesn’t support PASSWORD”. For me, this is very important to resolve this problem because application requires different database User authentication information. I have tried many options to solve this error and I […]

    0 0

    Prior to Cassandra 2.2, It supports only User base authentication, but now Cassandra introduces new Role based authentication. In this post, I am sharing small demonstration to create a Role in Cassandra and How to assign different permissions to that role. You can directly use this Role for authentication and you can also assign same […]

    0 0

    In this post, I am sharing an important list of ports which are used by the Cassandra for different purpose. Cassandra community has to know about these ports because it is very important while they are configuring firewall for Cassandra server. 9160: Cassandra Thrift client API 9042: Cassandra native client port 7000: Cassandra Internode cluster […]

    0 0

    In this post, I am sharing a list of important CQL shell commands of the Cassandra. Get help of all commands: [crayon-59c1fa8183e47458594866/] Check host and version: [crayon-59c1fa8183e56117101042/] Check cluster information: [crayon-59c1fa8183e5d248293240/] Check keyspaces: [crayon-59c1fa8183e63222273458/] Check user defined tables: [crayon-59c1fa8183e69119930827/] Check user defined types: [crayon-59c1fa8183e6e048644373/] Check consistency level: [crayon-59c1fa8183e74127980260/] Make your table output expanded: [crayon-59c1fa8183e79510922889/]

    0 0

    In this post, I am sharing an important list of Cassandra System Tables. Cassandra DBA can use these tables for a different investigation like, Schema information, Roles information, Tracing information and others. There are different keyspaces are available like, system, system_auth, system_schema, system_traces. system_auth Keyspace: [crayon-59c1fa8183575875063337/] system_schema Keyspace: [crayon-59c1fa8183584518698805/] system_traces Keyspace: [crayon-59c1fa818358a040453702/] system Keyspace: [crayon-59c1fa818359c771774042/]

    0 0

    In this post, I am sharing basic help to execute multiple statements using one single Cassandra batch. Many times, it is required to execute multiple statements using single batch. Cassandra CQL provides the BEGIN BATCH…APPLY BATCH command to execute multiple statements. Below is a small demonstration: Create Keyspace if not exists: [crayon-59c1fa8182e27998290279/] Use a Keyspace: […]

    0 0

    In this post, I am sharing small demonstration to create CQL User Defined Data Type in Cassandra. Using user defined data types, you can handle multiple fields into one user-defined column. For example, You can create user-defined data type for Address related columns, in which you can specify a Street name, City name, Pincode, etc. […]