YDB(Yandex Database)22.2 Documentation
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YDB cluster
来源 Yandex
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2026-11-09 12:47:04
Overview
General YDB schema
Disk subsystem of a cluster
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Contents
Getting started
Overview
Creating a database
Authentication
YDB command line interface (CLI)
YQL query language
YDB SDK
Self-hosted deployment
Overview
Docker
Binary file
Minikube
Useful links
How to edit the documentation
Overview
Content creation guide
Structure of subject directories
Building documentation
How to participate in the development of documentation
Creating customized documentation
Concepts
Overview
Terms and definitions
Connecting to and authenticating with a database
Data model and schema
Serverless and Dedicated operation modes
Transactions
Secondary indexes
Time to Live (TTL)
Scan queries
Database limits
YDB cluster
Overview
General YDB schema
Disk subsystem of a cluster
Recommendations
Overview
Choosing a primary key for maximum performance
Secondary indexes
Paginated output
Loading large data volumes
Using timeouts
Manage databases
Overview
Backup and recovery
Diagnostics
Overview
System views
Monitoring
Cluster management
Overview
Kubernetes
Overview
Deploying in Yandex Managed Service for Kubernetes
Deploying in AWS Elastic Kubernetes Service
Use
Manual
Local deployment
Cluster configuration
Maintaining a cluster’s disk subsystem
Overview
How to stay within the failure model
Disk load balancing
Methods to free up space on physical devices
Cluster extension
Adding storage groups
Safe restart and shutdown of nodes
Enabling/disabling SelfHeal
Enabling/disabling Scrubbing
Moving VDisks
Updating configurations via CMS
Updating configuration of the actor system
Embedded UI
Overview
YDB Monitoring
Hive web-viewer
Connections overview
Logs
Charts
System views
Reference
YQL
Overview
Data types
Overview
Simple
Optional
Containers
Special
Type casting
Text representation of data types
JSON
Syntax
Overview
Lexical structure
Expressions
ACTION
ALTER TABLE
CREATE TABLE
DECLARE
DELETE
DISCARD
DROP TABLE
GROUP BY
FLATTEN
INSERT
INTO RESULT
JOIN
PRAGMA
REPLACE
SELECT
UPDATE
UPSERT
VALUES
WINDOW
Unsupported statements
Built-in functions
Overview
Basic
Aggregate
Window
For lists
For dictionaries
For structures
For types
For JSON
C++ libraries
Overview
Hyperscan
Pcre
Pire
Re2
String
Unicode
DateTime
Url
Ip
Yson
Digest
Math
Histogram
YQL tutorial
Overview
Creating a table
Adding data to a table
Selecting data from all columns
Selecting data from specific columns
Sorting and filtering
Data aggregation
Additional selection criteria
Joining tables with JOIN
Inserting and updating data with REPLACE
Inserting and updating data with UPSERT
Inserting data with INSERT
Updating data with UPDATE
Deleting data
Adding and deleting columns
Deleting a table
CLI
Overview
Install
Structure of YDB CLI commands
Service commands
Connecting to and authenticating with a database
Global parameters
Working with the DB schema
List of objects
Information about the object
Directories
Secondary indexes
Renaming tables
Operations with data
Making a DB query
Query execution plan
Streaming table reads
Scan queries
Importing and exporting data
Overview
File structure of data export
Exporting data to the file system
Importing data from the file system
Connecting to and authenticating with S3
Exporting data to S3
Importing data from S3
Managing profiles
Overview
Creating a profile
Using a profile in requests
Getting profile information
Deleting a profile
Activated profile
Information services
List of endpoints
Authentication
Load testing
Overview
Stock load
SDK
Overview
Install
Authentication
Test app
Overview
C++
C# (.NET)
Go
Java
Node.js
PHP
Python
Archive
Go v1
Go v2
Handling errors in the API
Code recipes
Overview
Authentication
Overview
Using a token
Anonymous
Service account file
Metadata service
Using environment variables
Username and password based
Balancing
Overview
Random choice
Prefer the nearest data
Prefer the availability zone
Running repeat queries
Troubleshooting
Overview
Enable logging
Enable metrics in Prometheus
Enable tracing in Jaeger
Setting the session pool size
FAQ
Overview
General questions
SDK
Errors
YQL
Serverless
All questions on one page
Downloads
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