Richard Tucker wrote:
>
> We also have implemented a roll forward recovery mechanism. We modified a
> 7.2.1 version of Postgres.
> The mechanism is designed to provide a means of recoverying from the loss or
> corruption of media. It provides for duplicating wal_files so that if a
> wal_file is lost roll forward recovery can recover the database using the
> duplicated wal_files. Hooks were also added so that the roll forward
> recovery mechanism can be used to implement a hot standby database.
> Along with the roll forward recovery mechanism we have also implemented an
> online database backup utility which is synchronized with the recovery log
> so that the backup can be a starting point for a roll forward recovery
> session.
In researching who has done this work, I found that
http://www.multera.com/ is Progress Software. I assume this
"Distributed but Connected" is partly based on PostgreSQL.
-- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610)
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