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# Delayed Synchronization

The delayed synchronization feature allows you to select how the IDOL Content component synchronizes the index cache with the permanent data index. This process is useful in systems where you schedule indexing tasks at times when Content is also handling queries.

By default, synchronization occurs as soon as a representation of data has been made in the index cache. New data is available to the user (as query results) quickly, so use this setting in systems where current data is the priority. However, synchronization uses resources that Content could otherwise use for querying.

Delayed synchronization reduces the impact of this effect by collecting multiple data representations in the index cache and then synchronizing them all in one go. This process is useful in systems where query speed is more important than having current data.

NOTE:

HPE recommends using delayed synchronization if you index a lot of small files (files that are smaller than 100 MB).

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

- Set `DelayedSync` to `True` if you want the IDOL Content component to delay synchronization. In this case, Content stores data on disk only when:

  - the index cache is full.

  - the index cache contains some data and the timeout specified by `MaxSyncDelay` expires.

- Set `DelayedSync` to `False` if you do not want to delay synchronization.

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