Re: PostgreSQL alternative to "Oracle Real Application

On Thu, 2003-06-19 at 02:39, Shridhar Daithankar wrote:
> Sorry, I lost original post so replying several quote level deep.
>
> On 18 Jun 2003 at 13:22, Matthew Nuzum wrote:
> > > Where would the 400-4000GB of data go in this setup? On all the distinct
> > > postgresql-servers? On a single SAN/NAS? (Postgresql doesn't really work
> > > with that, does it? At least not in a loadbalancing setup).
> > > And why can't a scriptinglanguage not be used with loadbalancing? I know
> > > it is hard or impossible to get a connectionpool in such setups, but
> > > that doesn't mean they can't be used with loadbalancing...
>
> May be this is another approach, may be dumb but consider.
>
> The data is read-only archive data. Not likely to be changed once loaded.
> Besides this is not OLTP style stuff where heavy concurrent transactions are
> involved.
>
> I suggest that keep BLOBs in file system rather than in database. I know it is
> already suggested but just ealborating on that.
>
> There is no need to replicate huge amount of data. The app can store file name
> and checksum in database. Once loading is complete and correct, an archive copy
> of data can be kept offline for recovery purpose.
>
> The app. can retrieve data and file separately and checksum it. May be it would
>  need a small kind of caching layer but should be fairly trivial.
>
> Once that is done, the rest of the actual database would be pretty small and
> could be replicated if required. The database can be hosted on a small-medium
> server and BLOBS can be sent to SAN/NAS.
>
> Data loading need to be verified but that is a small cost to pay for advantages
> this method offers.

Another benefit of this method is that by using the Global File
System, multiple web servers could access those files simultaneously,
thus speeding response time.

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