What is time-stamping?
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It is a technique proposed by Lamport, used to order events
in a distributed system without the use of clocks. This
scheme is intended to order events consisting of the
transmission of messages.
Each system 'i' in the network maintains a counter Ci.
Every time a system transmits a message, it increments its
counter by 1 and attaches the time-stamp Ti to the message.
When a message is received, the receiving system 'j' sets
its counter Cj to 1 more than the maximum of its current
value and the incoming time-stamp Ti.
At each site, the ordering of messages is determined by
the following rules: For messages x from site i and y from
site j, x precedes y if one of the following conditions
holds....(a) if Ti<Tj or (b) if Ti=Tj and i.
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