[one-users] '-' or 'err' (instead of 0) as a value for parameters which ONE fails to get

[Carlos Martín Sánchez]

Hi Nikolay,

The memory and cpu are numeric attributes managed by the core, initialized
to 0.
If the driver doesn't report them, they are not updated.

The way I see it, the drivers didn't know how to populate the values, rather
than encounter an error monitoring them.
We could modify the core to initialize them with -1, and make the CLI show
'unk' or '-'.

But to me it makes more sense to report always a positive value, since the
data can be consumed by other applications, and dealing with the special
case of -1 (or 'err' if the data is read from the onevm output) can
introduce bugs.

Regards.
--
Carlos Martín, MSc
Project Major Contributor
OpenNebula - The Open Source Toolkit for Cloud Computing
www.OpenNebula.org <http://www.opennebula.org/> | cmartin at opennebula.org


---------- Forwarded message ----------
From: <knawnd at gmail.com>
Date: Wed, May 11, 2011 at 6:19 PM
Subject: [one-users] '-' or 'err' (instead of 0) as a value for parameters
which ONE fails to get
To: users <users at lists.opennebula.org>


Hi!

ONE shows 0 (zero) as a value for those parameters which it fails to
retrieve. For example,
$ onevm list
  ID     USER     NAME STAT CPU     MEM        HOSTNAME        TIME
  39 oneadmin   one-39 runn   0      0K       <host1> 01 04:02:29
  40 oneadmin   vps145 runn   0      0K       <host2> 00 08:23:28

I wonder if it wouldn't be more reasonable to show '-' or 'err' instead of
0?
Sorry if that question has been already asked before (I couldn't found
anything similar).

Regards,
Nikolay.


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