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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
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><A
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>6.2. <SPAN
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>Slony-I</SPAN
> Watchdog</A
></H1
><DIV
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><H2
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><A
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>6.2.1. Watchdogs: Keeping Slons Running</A
></H2
><A
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></A
><P
>There are a couple of <SPAN
CLASS="QUOTE"
>"watchdog"</SPAN
> scripts available
that monitor things, and restart the <SPAN
CLASS="APPLICATION"
>slon</SPAN
>
processes should they happen to die for some reason, such as a network
<SPAN
CLASS="QUOTE"
>"glitch"</SPAN
> that causes loss of connectivity.</P
><P
>You might want to run them...</P
><P
> The <SPAN
CLASS="QUOTE"
>"best new way"</SPAN
> of managing <A
HREF="slon.html"
><SPAN
CLASS="APPLICATION"
>slon</SPAN
></A
> processes is via the combination of <A
HREF="additionalutils.html#MKSLONCONF"
>Section 6.1.2</A
>, which creates a configuration file for each
node in a cluster, and <A
HREF="additionalutils.html#LAUNCHCLUSTERS"
>Section 6.1.4</A
>, which uses
those configuration files.</P
><P
> This approach is preferable to elder <SPAN
CLASS="QUOTE"
>"watchdog"</SPAN
>
systems in that you can very precisely <SPAN
CLASS="QUOTE"
>"nail down,"</SPAN
> in
each config file, the exact desired configuration for each node, and
not need to be concerned with what options the watchdog script may or
may not give you.  This is particularly important if you are using
<A
HREF="logshipping.html"
> log shipping </A
>, where forgetting
the <TT
CLASS="COMMAND"
>-a</TT
> option could ruin your log shipped node, and
thereby your whole day.</P
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