在 2014-11-20 19:02, Graham Clinch 写道:
In the xfer log file, there are line of request to servers and ones of
reply from the servers. Do they come in pairs? If do, are they next to
each other?
Assuming we're thinking of the same xfer log (categories
xfer-in/xfer-out)...
In normal operation you could expect pairs:
* '(A|I)XFR started' & '(A|I)XFR ended' for xfer-out,
* 'connected' & 'Transfer completed' for xfer-in
yes.
but they won't necessarily be next to each other - a second transfer may
start before the first has finished (however, perhaps with
transfers-in/transfers-out set to 1...?)
Yes. it is not necessary for them to be next to each other.
But how to pair two lines which are a pair but not next to each other?
Are there identification to locate them?
Sometimes, to find pairs are needed to found to fix zone transfer problems.
It'll be different in error/failure situations.
Is there a particular reason to be interested in whether a transfer
completes before the next one starts?
Graham
Liu Mingxing
CNNIC
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