On Fri, Oct 19, 2012 at 4:16 PM, Vishal Gupta <[email protected]>wrote:
> I am using colmux on a Oracle Exadata Machine full rack with linux hosts
> (OEL 5.7), if colmux is left running for few hours it starts showing
> duplicate lines for server in the output.
>
are you using the latest version [3.2.0]? I do remember seeing that in an
earlier version and I thought I fixed it. I'm really hoping it's not still
there because it can be pretty painful to track down or even reproduce.
The way colmux works is it asynchronously receives/stores data from each
remote host and at the same time fires a timer every monitoring interval.
Colmux then displays the late value it's seen for each entry. Sounds
simple enough but it turned of the incoming data was occasionally
overwriting the data from the previous samples. My solution was to
double-buffer the data, reading from one dataset while writing to a new
one. I'm just hoping I don't need to dig back into it.
> Also i noticed that some of the hosts are automatically completely removed
> from the output. Is there some kind of timeout configured in colmux or
> collectl which might remove the server entries from the output over time.
>
unfortunately the way colmux works is if it doesn't hear from a remote
server in x-seconds (which you can set via --age) it drops it from the list
and doesn't try to reconnect. as for the age, you don't want to make it
too long or else a server could disconnect and you'd never know it and keep
displaying stale data. I suppose on a glitchy network you could end up
having to wait a little longer. Maybe you could try upping it to 5 or 10
and see if that helps OR if the remote machine really did drop the link.
you're not the first to ask about reconnecting when a host drops...
-mark
> Regards,****
> Vishal Gupta****
> Blog <http://blog.vishalgupta.com/> |
> LinkedIn<http://www.linkedin.com/in/vishalgupta77>
> * | *Twitter <https://twitter.com/vishalgupta77>
>
>
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