Hi Alexander,

Generally we would recommend having a combined rrd + mysql + webui server, to reduce generation latency for the graphs.

In this case you install the central system as normal, configure rrdcached as per the docs, then on the slave systems you do a "normal" install then modify the config.php to point observium at the central rrdcached and MySQL server.

Once rrdcached is configured with a remote IP on the slave, it'll automatically switch to handling rrds purely via rrdcached.

Adam.

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On 5 May 2019, 18:58, at 18:58, "Joelly, Alexander via observium" observium@observium.org wrote:

Hi,

When using a dedicated rrd caching server - for what is the local /opt/observium/rrd caching folder used for? In our setup we created a dedicated rrd-caching server and several distributed and partitioned pollers and would expect the rrd's are only written/updated on the rrd-caching server and do not need much diskspace on the pollers but it seems the rrd's are also written on the pollers? Is that on purpose (fallback - rrd server unavailable) or what is the need of the rrd's on the pollers when using a rrd-caching server?

Thanks, Alex

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