At my Ganglia installation, rrd files at /var/lib/ganglia/rrds/
are owned by nobody:root, with permission 666.

Due to system audit issues, world-writable and world-readable
files are not preferred.

I have tried to set the rrd files world non-readable, but it breaks the UI.
I have tried to set the rrd files world non-writable, so far so good.

I post here in case it is useful for others.

Ganglia version: 3.3.7
OS: CentOS 6.4

-- 
Clotho Tsang
Senior Software Engineer
Cluster Technology Limited
Email: clo...@clustertech.com
Tel: (852) 2655-6129
Fax: (852) 2994-2101
Website: www.clustertech.com
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