Arenadata QuickMarts
Arenadata QuickMarts (ADQM) is a cluster column-oriented DBMS built on ClickHouse. ADQM generates various online analytical reports based on vast amounts of information stored in flat marts. ADQM is much faster than traditional DBMS.
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Sharding is a database design principle that suggests locating parts of the same table on different shards. Shard is a cluster node that can consist of one or more replicas. Replicas are servers that duplicate data within a shard. SELECT and INSERT queries can be sent to any replica of a shard, there is no a dedicated master.
A window function performs a calculation across a set of rows: all rows in a query are divided into groups (windows), and each group has its own aggregates. It does not return a single output row as an aggregate function. A window function adds an aggregated value to each row of the selection result in a separate column.
Indexing is a technique to improve database performance. Indexes are special data structures that allow a database server to quickly find requested rows by values of a key column (or column set) without a full table scan.
Learn about ways to install ADQM on hosts with/without access to Internet (online/offline) using ADCM.
A dictionary is a key/value data store that is fully or partially stored in the RAM of the ADQM server and can be used as a reference to substitute data values by keys in the final sample.
The JOIN clause combines columns from two tables into a new table. A set of data rows in a resulting table depends on the JOIN type and the specified join conditions.
Learn about the minimum software requirements for servers of an ADQM cluster.
This article describes tools to improve the performance of queries in ADQM.
This article describes how to resolve an issue with unsupported encryption type that may occur when you install ADQM on a RED OS host and try to kerberize a cluster using Active Directory.
This article describes the parameters that can be configured for ADQM services via ADCM.