[mrtg] rrd file size to store 5-min data for 1 yr

[Francis Borman]

Hi guys,

Anyone has an experience to store 5-min data of 1000 router interfaces for 1
yr in rrd?

I knwo that we can tune up the RRD, so that we can store as much data as we
like. However, the rrd size for just storing 5-min data for two days is
about 170kb!!! It seems that to store 1 yr 5-min data, the file size must be
31 MB!!

Let say, if I have one rrd per router interface, and if I got 1000
interfaces to monitor, I must prepare 31GB for just data storage?!!!!!

It seems a huge capacity for a PC/Server!!!! It also takes a very long time
to retrieve data for one particular date!!!!! (That's why we need to store
5-min data for a yr)

We are now doing sth that archive all rrd every midnite and write a script
for data retrieval. When we comes up a situation that need to reference the
past data, we use that script to retrieve the archived rrd of that date. It
seems to work for somehow, but what if I need to retrieved data for a
particular week??? It seems that we need another way to handle it......

Any suggests? ^_^ Thanks

Francis

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