| From: | Hannu Krosing <hannu(at)tm(dot)ee> |
|---|---|
| To: | Franck Martin <Franck(at)sopac(dot)org> |
| Cc: | "'Lincoln Yeoh'" <lyeoh(at)pop(dot)jaring(dot)my>, Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Re: 7.2 items |
| Date: | 2001-05-14 05:30:45 |
| Message-ID: | 3AFF6D85.E9171127@tm.ee |
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| Lists: | pgsql-hackers |
Franck Martin wrote:
>
> I think OID should be truly unique in the world as to make it easier for
> replication. If OID are real unique number (not in a table, not in a
> database, but in the world) then replication can be easily built with
> OIDs...
>
Exactly! That is what the Mariposa project did - they made OIDs uniqe
and
consisting of 32bit site id + 32bit local OID. I guess this could be
split
some other way too, like 20 bit site id + 44bit local or any other.
IMHO the best would be a scheme of 32bit site id + 32bit local, but each
site can get additional site ids from some central (for a supersite)
table
when it sees that it is near runnig out of oids.
-----------------------
Hannu
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