On Thu, Apr 16, 2015 at 11:12:28AM +0000, William Hay wrote:
It appears that you can have load sensors report values for individual hosts
other than the one on which it runs. I've tested this by having a load sensor
run on one host report different values for two different hosts and used qhost
-F to verify that gridengine reports them.
The possibility of doing this is implied by the format of load sensor reports
but I've never seen it explicitly documented as possible or used elsewhere.
Being able to use this would simplify certain aspects of the configuration of
our production cluster so it would be useful to know if this is intended
behavior
and therefore something I can rely on or an implementation quirk.
Opinions?
It's a useful trick.
It's also a security issue, of a sort. A specific host could subvert
values for other hosts (intentionally or not). I realize that an actual
attacker who can alter a load sensor script probably has better things
to do than adjust the tmp_free counters. However, a bug in the script
could legitamately cause trouble.
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Jesse Becker (Contractor)
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