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0000834: Add clarity to mention of CRON to differentiate Springs vers…
…ion vs the typical Unix one.
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mhanes committed Oct 11, 2012
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Expand Up @@ -465,6 +465,16 @@ insert into sym_data (
by a cron expression as specified by the following properties: <literal>job.purge.outgoing.cron</literal>, <literal>job.purge.incoming.cron</literal>,
and <literal>job.purge.datagaps.cron</literal>. The default is <literal>0 0 0 * * *</literal>, or once per day at midnight.
</para>

<important>
<para>
SymmetricDS utilizes Spring's CRON support, which includes seconds as the first parameter. This differs from the typical Unix-based
implementation, where the first parameter is usually minutes. For example, <literal>*/15 * * * * *</literal> means every 15 seconds, not every 15 minutes.
See <ulink url="http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/scheduling/support/CronSequenceGenerator.html">Spring's documentation</ulink>
for more details.
</para>
</important>

<para>
Two retention period properties
indicate how much history SymmetricDS will retain before purging. The <literal>purge.retention.minutes</literal> property indicates the period
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