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# Abstract
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Sigres is a fast version of PostgreSQL. 
It accelerates INSERT/UPDATE operations 
by modifying write ahead logging protocol code, 
i.e. around XLOG. 
The modifications are mainly done in xlog.c, 
and you can find the modification easily by seeing "#ifdef SIGRES".

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# Usage
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To use Sigres, you are required :
(1) Preparing UPS (Uninterruptible Power Supply).
(2) Execute "pgctl shutdown" while UPS works 
    when your system encounters power failure.
Except for the above, the usage of Sigres is 
the same as the PostgreSQL-8.2.1.

Enjoy !


-- Hideyuki Kawashima (kawasima@cs.tsukuba.ac.jp)

