Knowledge Discovery 25.1
Getting Started Guide

# Delayed Synchronization

The indexing process has the following stages:

1. The Content component creates a representation of the new data in the index cache.

2. The Content component synchronizes the cache with data that it currently contains, and stores the new data on disk, removing it from the index cache.

Delayed synchronization allows you to select how the Content synchronizes the index cache with the Knowledge Discovery data. This process is useful in systems where you schedule indexing tasks at times when Knowledge Discovery is also handling queries.

The `DelayedSync` parameter in the `[Server]` section of the Content configuration file allows you to specify whether the indexing process uses delayed synchronization.

If the `DelayedSync` parameter is not set, Content synchronizes the cache as soon as the representation of data is made. New data is available to the user (as query results) quickly. Use this setting in systems where up-to-date data is the priority.

Synchronization uses resources that Content could otherwise use for querying. Delayed synchronization reduces this effect by collecting multiple data representations in the index cache and then synchronizing them all with your index data at the same time. This process is useful in systems where query speed is more important than having the most up-to-date data.

NOTE: OpenText recommends that you use delayed synchronization if you index a large number of small files (files that are smaller than 100MB).

To configure delayed synchronization

1. Open the Content component configuration file in a text editor.

2. In the `[Server]` section, set the `DelayedSync` parameter to `True`.

3. In the `[Server]` section, set the `MaxSyncDelay` parameter to the maximum length of time between synchronization operations.

4. In the `[IndexCache]` section, set the `IndexCacheMaxSize` parameter to the maximum size that the Content component index cache can grow to before synchronizing.

   NOTE: When the index cache reaches this maximum size, Content synchronizes the cache, but data is not available for searching until the `MaxSyncDelay` has passed, or you send a `DRESYNC` index action.

5. Save and close the configuration file.

6. Restart the Content component for your changes to take effect.

Copyright 2024 Open Text
Version 25.1 | Last updated January 2025

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Product: Knowledge Discovery 25.1

Topic Title: Delayed Synchronization