[rrd-users] Sizing of RRD Files

Alex van den Bogaerdt alex at vandenbogaerdt.nl
Mon Nov 10 17:31:50 CET 2008

This will vary from os to os (bytes per variable) and from setup to setup 
(amount of DSes in your RRD).

Create a test rrd file. Note its size. shrink the rrd file by one row. Note 
its size. Subtract, now you know the size per row.

The actual file size will be more than n*rowsize. This is because of the 
file header. It is relatively small under normal circumstances.

5 minutes per row, 2 years: (365+366)*86400/300=210528. One entry for each 
DS, being 6 or 8 bytes.  Some 1.3 to 1.7 MB per DS should be right, unless I 
made a mistake here.

----- Original Message ----- 
From: "O'Neil, Donald A." <DONALD.A.O'NEIL at saic.com>
To: <rrd-users at lists.oetiker.ch>
Sent: Monday, November 10, 2008 5:13 PM
Subject: [rrd-users] Sizing of RRD Files

How many bytes does each row in an RRD file take?

I'm trying to get an accurate count for file size for something that
keeps the data around for 2 years every 5 minutes.


Don O'Neil
Senior Network Engineer
SAIC - CCSD Network Operations
(702) 351-7261 cell

(702) 799-6174 fax

0099-5941 wan

oneilda at saic.com


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