MarginaliaSearch/code/services-core/executor-service
Viktor Lofgren edc1acbb7e (*) Replace EC_DOMAIN_LINK table with files and in-memory caching
The EC_DOMAIN_LINK MariaDB table stores links between domains.  This is problematic, as both updating and querying this table is very slow in relation to how small the data is (~10 GB).  This slowness is largely caused by the database enforcing ACID guarantees we don't particularly need.

This changeset replaces the EC_DOMAIN_LINK table with a file in each index node containing 32 bit integer pairs corresponding to links between two domains.  This file is loaded in memory in each node, and can be queried via the Query Service.

A migration step is needed before this file is created in each node.   Until that happens, the actual data is loaded from the EC_DOMAIN_LINK table, but accessed as though it was a file.

The changeset also migrates/renames the links.db file to documents.db to avoid naming confusion between the two.
2024-01-08 15:53:13 +01:00
..
src (*) Replace EC_DOMAIN_LINK table with files and in-memory caching 2024-01-08 15:53:13 +01:00
build.gradle (*) Replace EC_DOMAIN_LINK table with files and in-memory caching 2024-01-08 15:53:13 +01:00
readme.md (docs) Update documentation 2023-10-27 12:45:39 +02:00

The executor service is a partitioned service responsible for executing and keeping track of long running maintenance and operational tasks, such as crawling or data processing.

It accomplishes this using the message queue and actor library, which permits program state to survive crashes and reboots. The executor service is closely linked to the control-service, which provides a user interface for much of the executor's functionality.

Central Classes