Per the 3.1.0 release notes:
------------------------------------------
Upgrading from 3.0
The 3.0 and 3.1 versions of ganglia are only compatible at the XML
layer, and so you can't mix them in the same cluster (as defined by the
multicast address or unicast collector used).
A 3.1 gmetad will be able to collect data from either version (both
gmond or gmetad) and so it will be better if you plan your migration in
a cluster by cluster basis and starting from the top of your gmetad
hierarchy (if you have one) recursively as described by the following
steps:
1. upgrade your head gmetad/frontend (or your only gmetad if not
using a hierarchy)
2. upgrade each one of the sources one cluster at a time (will
include upgrading a leaf gmetad if using a hierarchy)
------------------------------------------
Just to confirm:
Do the statements above imply that you can upgrade the gmetad's to
3.1.X, and still have them safely polling/pulling data from 3.0 gmond's?
(but cannot mix 3.1.x and 3.0 versions of gmond's on the same cluster?)
Regards,
Michael Zebrowski
eXcellence in IS Solutions, Inc. (X-ISS) http://www.x-iss.com
em: [EMAIL PROTECTED] / ph. 713-862-9200 x 231
-----Original Message-----
From: Jason A. Smith [mailto:[EMAIL PROTECTED]
Sent: Saturday, October 25, 2008 8:13 AM
To: Kristy Kallback-Rose
Cc: [email protected]
Subject: Re: [Ganglia-general] REPOST: 3.1.1 and 3.0.X compatibility?
Hi Kristy,
Ganglia versions 3.0.x & 3.1.x are only compatible at the XML/gmetad
level, not at the gmond udp/multicast metric level. See the release
notes for version 3.1.0 for more information:
http://ganglia.wiki.sourceforge.net/ganglia_release_notes
Perhaps this important note should be kept in the release notes for all
3.1.x versions, just in case someone skips over 3.1.0 when upgrading.
~Jason
On Fri, 2008-10-24 at 16:05 -0400, Kristy Kallback-Rose wrote:
> [repost with subject line changed, was: 3.1.1 report to]
>
>
> I currently have systems with gmond 3.0.5 reporting to a system with
> gmond 3.0.5 and gmetad 3.0.4 (gmetad -V ganglia 3.0.4). I have
> upgraded one of the reporting hosts to gmond 3.1.1 and while it
> appears as an uphost on the web frontend, none of the metrics are
> appearing for that host.
>
>
> I created a new config file on the 3.1.1 host using gmond
> --default_config and then just added a udp_send_channel section to
> report to my data collection host.
>
>
> When I run gmond in debug mode on the 3.1.1 host it seems to be happy,
> reports loading modules, collecting data, sending messages...
>
>
> So, my questions are:
>
>
> 1) Do I have something dorked up, or is it the case that a 3.1.x gmond
> cannot report to the older gmond?
> 2) If I upgrade my "central" gmond and gmetad (the one that the hosts
> report to) will I still have the historical data from when I was
> running Ganglia at the 3.0.x version? or should I snapshot the data at
> the 3.0.x version and expect new data files (RRD files) under 3.1.x?
>
>
> Thanks,
> Kristy
>
>
> Kristy Kallback-Rose
> Research Storage
> [EMAIL PROTECTED]
>
>
>
>
>
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