Also, if the size of the XML payload is the biggest concern (rather than the
sheer amount of XDR traffic) then gzip compression would be a good idea:
gzip_output = yes
See https://www.quantcast.com/blog/quantcast-open-source-diaries-ganglia-gzip/
for some background. Also might want to look into using rrdcached ?
https://github.com/ganglia/monitor-core/wiki/Integrating-Ganglia-with-rrdcached
/Anders
Den 2017-03-30 kl. 15:22, skrev Vladimir Vuksan:
Clusters are logical grouping of like hosts. This can be e.g. per location
(same data center), per app or per function (DB, web, etc.). It really depends
how you are viewing your environment. There is no right or wrong way to group
it.
Vladimir
03/30/2017 u 04:30 AM, Guo, Jason je napisao/la:
Thanks Vladimir
As you mentioned, FB had clusters with tens of thousands of nodes in a cluster.
How they orchestrate these nodes? Here are some options in my mind
1. All the nodes share a few centralized gmonds and all of them belong to
a single cluster (the cluster concept in ganglia)
2. All the nodes share a few centralized gmonds and each centralized
gmond belong to different cluster, and there is a single gmetad which poll data
from these centralized gmond
3. There are multiple gmetad/grid and then orchestrate these grids with a
centralized gmetad/grid\
Thanks & Best Regards,
Jason Guo
From: Vladimir Vuksan <vli...@veus.hr><mailto:vli...@veus.hr>
Date: Wednesday, March 29, 2017 at 20:09
To: "Guo, Jason" <ju...@ebay.com><mailto:ju...@ebay.com>,
"ganglia-developers@lists.sourceforge.net"<mailto:ganglia-developers@lists.sourceforge.net>
<ganglia-developers@lists.sourceforge.net><mailto:ganglia-developers@lists.sourceforge.net>
Subject: Re: [Ganglia-developers] Does Ganglia work well for a large-scale
cluster
Hi Jason,
it depends on the number of metrics and associated metadata in the cluster and
how busy gmetad is overall. Also depends on your hardware. At one point FB had
clusters with tens of thousands of nodes in a cluster.
Try to keep your metrics lean ie. don't add any metric descriptions if you
don't have to so to keep the XML payload small and it should be fine.
Vladimir
3/28/2017 u 10:19 PM, Guo, Jason je napisao/la:
Hi,
I’m writing this mail to discuss whether Ganglia works well for a large-scale
cluster (more than 4000 nodes).
As per Ganglia document, ganglia can scale to handle clusters with 2000 nodes.
So many people have concern on using Ganglia for a 4000 nodes production
cluster.
It has been used to link clusters across university campuses and around the
world and can scale to handle clusters with 2000 nodes.
If the cluster is large than 2000 nodes, say 4000 nodes, can Ganglia handle it
properly?
To verify this, I create a 5000 nodes ganglia cluster on top of Docker cluster
(10 machine).
I put 500 nodes in a cluster, so there are 10 cluster. And these 10 clusters
are in the same Grid.
For each gmond, I use a script to generate 30 customized metrics (with
gmetric).
Currently it works fine in the Docker based test environment.
So, my question is whether Ganglia is suitable for 4000 nodes cluster?
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