Download Only synchronization parameter

Prevents changes from being uploaded from the UltraLite database during this synchronization.

When you have remotes that are synchronized by download-only synchronization, you should regularly do a full synchronization to reduce the amount of log that is scanned by the download-only synchronization. Otherwise, the download-only synchronizations will take an increasingly long time to complete.

For ulsync When download-only synchronization occurs, ulsync does not upload any changes to the data. Instead, it:
- Uploads information about the schema and the value stored in the progress counter.
- Ensures that changes on the remote database are not overwritten during download-only synchronization.

ulsync performs these actions by scanning the UltraLite database log to watch for rows with pending operations on the consolidated database. If ulsync detects a conflict, the download is rolled back and the synchronization fails. You must then do a full synchronization (that is an upload and a download) to correct this conflict.

Example

ulsync supports this parameter as an extended synchronization parameter:

ulsync -c DBF=myuldb.udb "MobiLinkUid=remoteA;ScriptVersion=2;DownloadOnly=ON;Stream=http"

UltraLite for C/C++ applications can set the parameter as follows:

ul_sync_info info;
// ...
info.download_only = ul_true;

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Download Only synchronization parameter

Syntax

Default

Allowed values

Conflicts with

Remarks

See also

Example