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Database Lab Engine components

Main container​

Name​

User-defined.

Container labels​

  • dblab_control

Responsibility​

  • Manages all other containers
  • Handles data retrieval and snapshot creation
  • Offers an HTTP API to manage snapshots and clones
  • Generates an internal DLE RuntimeID on each start to mark related components

How to manage​

Operates as a Docker container. See the guide for administering DLE.

Clone container​

Name​

Begins with the prefix dblab_clone_.

The clone's container name is associated with its port number, such as dblab_clone_6000 for a clone operating on port 6000.

Container labels​

  • dblab_clone
  • <pool_name>

Responsibility​

  • Provides a thin clone: an independent PostgreSQL database server with thinly cloned / branched data directory

How to manage​

Sync container​

Name​

Begins with the prefix dblab_sync_.

Container names include a DLE RuntimeID, such as dblab_sync_bt48bvi9c0h0.

Container labels​

  • dblab_control: dblab_sync
  • dblab_instance_id: <dle_instance_id>
  • dblab_engine_name: <dle_container_name>

Responsibility​

  • Sets up a replica fetching WALs from either archives or source database to maintain continuously updated state of the original data directory

How to manage​

Automatically starts and stops.

To activate a sync instance, use the syncInstance option for a physical restore job in the DLE configuration file.

Physical restore container​

Name​

Begins with the prefix dblab_phr_.

Container names include a DLE RuntimeID, such as dblab_phr_bt48bvi9c0h0.

Container labels​

  • dblab_control: dblab_restore
  • dblab_instance_id: <dle_instance_id>
  • dblab_engine_name: <dle_container_name>

Responsibility​

  • Restores a physical copy of the initial database

How to manage​

Automatically starts and stops.

Executed by a physical restore job.

Promote container​

Name​

Begins with the prefix dblab_promote_.

Container names include a DLE RuntimeID, such as dblab_promote_bt48bvi9c0h0.

Container labels​

  • dblab_control: dblab_promote
  • dblab_instance_id: <dle_instance_id>
  • dblab_engine_name: <dle_container_name>

Responsibility​

  • Promotes a database after fetching of physically-restored data

How to manage​

Automatically starts and stops.

To activate data promotion, use the promotion.enabled option for a physical snapshot job in the Database Lab configuration file.

Logical dump container​

Name​

Begins with the prefix dblab_ld_.

Container names include a Database Lab RuntimeID, such as dblab_ld_bt48bvi9c0h0.

Container labels​

  • dblab_control: dblab_dump
  • dblab_instance_id: <dle_instance_id>
  • dblab_engine_name: <dle_container_name>

Responsibility​

  • Creates a logical copy (dump) of the source database

How to manage​

Automatically starts and stops.

Executed by a logical dump job.

Logical restore container​

Name​

Starts with the prefix dblab_lr_.

The container names will contain a DLE RuntimeID. For example, dblab_lr_bt48bvi9c0h0.

Container labels​

  • dblab_control: dblab_restore
  • dblab_instance_id: <dle_instance_id>
  • dblab_engine_name: <dle_container_name>

Responsibility​

  • Restores a database from a logical copy (dump) of the source database

How to manage​

Automatically starts and stops.

Executed by a logical restore job.

Logical patch container​

Name​

Begins with the prefix dblab_patch_.

Container names include a DLE RuntimeID, such as dblab_patch_bt48bvi9c0h0.

Container labels​

  • dblab_control: dblab_patch
  • dblab_instance_id: <dle_instance_id>
  • dblab_engine_name: <dle_container_name>

Responsibility​

  • Executes preprocessing queries before capturing a logical snapshot

How to manage​

Automatically starts and stops.

Runs during a logical restore job if preprocessing queries are enabled in the configuration settings (logicalSnapshot.options.dataPatching).

Embedded UI container​

Name​

Begins with the prefix dblab_embedded_ui_.

Container names include a DLE RuntimeID, such as dblab_embedded_ui_bt48bvi9c0h0.

Container labels​

  • dblab_satellite: dblab_embedded_ui
  • dblab_instance_id: <dle_instance_id>
  • dblab_engine_name: <dle_container_name>

Responsibility​

  • provides a visual user interface (UI) for interacting with the DLE.

How to manage​

Automatically starts and stops based on configuration settings in the embeddedUI section.