Jim Jagielski pisze:
On May 29, 2008, at 5:38 PM, andrzej wrote:
Hi,
module mod_proxy_balancer can make decision basing on volume of
traffic or number of requests. How, for example, this volume is
counted? Is it counted from the time server starts (hope not) or maybe
it is counted in 10 minutes period (after 10 minutes values read and
transfered are reset and counted from zero)? Where/how can I change
this time?
It is counted after each request... that each, the counters are
updated with info after each request.
They are not "reset" or "aged" for a number of reasons:
1. The overhead associated with it. Esp something like what
is done in mod_jk...
2. Validity: LBs try to maintain an overall average. If
you occasionally "reset" then you lose knowledge of
the past and so you are only averaging over smaller
time-periods... It's like the difference in tracking
stocks short-term rather than long-term. LB is a long
term action.
The only reason I can see for some kind of "reset" is to
avoid overflow, but even then you don't want to "reset" to
0 but rather do a uniform normalization.
Why is the current behavior bad and why do you want to change
it?
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Hi,
thanks for answer. This behavior isn't bad. I'm writing my MSc project
and when I've told my DSc that this counters are not reseting he ordered
me to better known the software. I don't know how I convince him, he was
so sure that this values are measured in periods...
Regards
Andrew
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