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

[Sander Foppen]

You must be doing something wrong. A RRD should never grow bigger then
93K.
It's 93 when you start and it should stay 93K during time.

-----Original Message-----
From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch]
On Behalf Of Francis Borman
Sent: vrijdag 9 mei 2003 12:55
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] rrd file size to store 5-min data for 1 yr

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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