From: | "Hiroshi Inoue" <Inoue(at)tpf(dot)co(dot)jp> |
---|---|
To: | "Vadim Mikheev" <vadim(at)krs(dot)ru> |
Cc: | "The Hermit Hacker" <scrappy(at)hub(dot)org>, <pgsql-general(at)postgreSQL(dot)org> |
Subject: | RE: [GENERAL] TODO list elements |
Date: | 1998-12-14 09:13:14 |
Message-ID: | 000001be2741$fa8f37c0$2801007e@cadzone.tpf.co.jp |
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> -----Original Message-----
> From: root(at)dune(dot)krs(dot)ru [mailto:root(at)dune(dot)krs(dot)ru]On Behalf Of Vadim
> Mikheev
> Sent: Monday, December 14, 1998 5:03 PM
> To: Hiroshi Inoue
> Cc: The Hermit Hacker; pgsql-general(at)postgreSQL(dot)org
> Subject: Re: [GENERAL] TODO list elements
>
>
> Hiroshi Inoue wrote:
> >
> > > And note - this will be not row level locking, but
> > > multi-version concurrency control.
> > >
> >
> > What does it mean ?
> > LLL in 6.5 doesn't include row level locking ?
>
> One systems (Informix, Sybase) use locking for concurrency control,
> another ones (Oracle, Interbase) use multi-versioning for this.
> I'm implementing multi-version concurrency control.
>
My words might be obscure.
What I meant was
How writers block other writers in LLL ?
Certainly readers block no writers(readers) in LLL.
But writers block no writers or the same-row writers or the same-table
writers ?
Currently writers block the same-table writers(readers also) ?
Thanks.
Hiroshi Inoue
Inoue(at)tpf(dot)co(dot)jp
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