|Subject||Re: FB database in RAM|
> So, does this mean that you can go online immediately after a rebootIf i do the reeboot proces self then this look like this
> using the disk copy, while FB is at work copying data to a new RAM disk
> Is this how it works:
> 1. Go online with the disk copy as primary and RAM copy as
> secondary/shadow. FB starts copying data to the RAM shadow...
> Performance will be as with a regular disk based database (or worse, due
> to the shadow copying being in progress).
> 2. When FB is done copying data the RAM shadow, you switch and make the
> RAM copy primary and the disk copy secondary/shadow. Performace is now
> lightning fast for selects, but inserts and updates still have to go to
> disk and are as slow as with a regular disk based database (or worse
> because it also has to work with the RAm copy).
> Kjell Rilbe
> DataDIA AB
> E-post: kjell@...
> Telefon: 08-761 06 55
> Mobil: 0733-44 24 64
before os shutdown i turn LAN off stop FB process copy database to hard disk. After reeboot i copy database back to ram disk and start FB and LAN.
I have not hard failture then i only test this scenario
i acctivate shadow (and recreate new one) and i am back to normal configuration