Great idea.
I like the idea of greying out. Perhaps something like a <div style="display:
inline-block; opacity: 0.4;"><img...></div> would work. Red's probably not a
great choice; lots of folks can't distinguish it, and it's just too loud.
Also, with a grey-out, you can do something fairly consistent in host view for
a down node: make the background grey. If you've got dozens of metrics, it's
important that the state be easily known way down the page.
Thanks --
-- ReC
On Sep 10, 2009, at 4:27 PM, Bernard Li wrote:
Hi all:
With current releases of Ganglia, when a node goes down, it is
represented by a red box with the hostname, "load_one: down" and its
last heartbeat in the frontend.
There is no way to click through to get historic graphs, eg. if you
would like to find out if the temperature was extremely high prior to
the node crashing.
I was thinking of changing the behaviour such that the user can access
the historic data easily.
As Kostas pointed out, all that is needed is comment out the "if
($hosts_down)" block in host_view.php and the hostname can then be
clicked through to get the historic data.
However, what I like is to be able to show the actual graph as well
(in the cluster summary view) but have some other representation that
the node is down (perhaps have a red border, or some descriptive text
saying that the node is down, or maybe grey it out, etc...)
What do you guys think?
Cheers,
Bernard
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