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List:       linux-ha-dev
Subject:    [Linux-ha-dev] an improvement in hbagent...
From:       Yoshiyuki Yoshida <yoshiday () valinux ! co ! jp>
Date:       2007-07-23 8:12:11
Message-ID: 20070723171011.F704.YOSHIDAY () valinux ! co ! jp
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Hello, all

I'm trying the improvement of SNMP responce in hbagent...


[SNMP AGENT] Cache values where possible

While using net-snmp's snmp-walk tool to probe heartbeat I encountered
timeouts. It seems that this is caused by hbagent querying the
linux-ha core extensively in order to satisfy each SNMP request.
In order to mitigate this problem it seems sensible for hbagent to cache
infrequently (never) updated values.

This patch implements a "partial" mode for hbagent, which when
in effect will cache values, periodically updating them according
to the supplied refresh period.

Patch by Yoshiyuki Yoshida. Text by Simon Horman.

Cc: Simon Horman <horms@verge.net.au>
Signed-off-by: Yoshiyuki Yoshida <yoshiday@valinux.co.jp>


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