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What is AQL Aerospike?

What is AQL Aerospike?

AQL is a data browser for examination of the DB and a tool for lightweight administrative tasks for maintaining. The aql command is complementary to asadm and asinfo , which are the primary administrative mechanisms for major, extensive DB needs or examination.

What is Aerospike index?

The primary key index is a blend of distributed hash table technology with a distributed tree structure in each server. See data-distribution for details on hashing and partitioning. Aerospike uses a red-black in-memory structure called a sprig. For each partition, there can be configurable number of sprigs.

How do I query Aerospike?

Create a Query Application

1. Install and configure the Aerospike server.
2. Create indexes on a bin.
3. Insert records within an indexed bin.
4. Construct a predicate (a WHERE clause), make the query request, and process returned records.

How do I access my Aerospike data?

You can view it by setting aerospike. record-key-hidden to false for future queries. Make sure that the data browser container is running by using the docker ps -a command.

How do I run AQL?

You can run AQL queries from the ArangoDB Shell with the _query and _createStatement methods of the db object….AQL queries can be executed using:

1. the web interface,
2. the db object (either in arangosh or in a Foxx service)
3. or the raw HTTP API.

What is AQL in quality control?

The acceptable quality level (AQL) is a measure applied to products and defined in ISO 2859-1 as the “quality level that is the worst tolerable.” The AQL tells you how many defective components are considered acceptable during random sampling quality inspections.

What is name of secondary index?

Global secondary index — An index with a partition key and a sort key that can be different from those on the base table. A global secondary index is considered “global” because queries on the index can span all of the data in the base table, across all partitions.

Why do we use secondary index?

A secondary index can be created using one or more columns of a database table, providing the basis for both rapid random lookups and efficient access of ordered records when querying by those columns. Secondary indexes require additional writes and storage space to maintain the index data structure.

How do I delete a set in Aerospike?

Here is one way I observe that a set is dropped:

1. Insert records (through Java Client) into a set with expiration set for each record.
2. after all the records are expired, use asinfo to set ‘set-delete’ flag to TRUE.
3. restart aerospike.
4. The set will be dropped.

How does Aerospike store data?

Data in Aerospike is organized into namespaces (similar to databases in RDBMS) that contain sets (similar to RDBMS tables). Inside sets are records uniquely identified by a hash key digest (20-byte RIPEMD-160). An in-memory primary index over these digest values provides fast access to records.

How do I delete data from Aerospike?

Use these Aerospike PHP client methods to delete record and bin data from the Aerospike database:

1. remove() — Remove the record at the specified key.
2. removeBin() — Remove specified bins from a record. Remove one bin from a record: $key = $db->initKey(“infosphere”, “characters”, 3); $db->removeBin($key, [“Alma Mater”]);

What is an AQL file?

AQL files are text files that contain text extraction rules that are written in the AQL programming language. A module contains one or more AQL files. AQL files provide the definition of AQL artifacts by using views, dictionaries, tables, and user-defined functions.