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From: Ron Johnson <[email protected]>
To: pgsql-generallists.postgresql.org <[email protected]>
Subject: Re: PostgreSQL Active-Active Clustering
Date: Mon, 15 Jul 2024 22:26:26 -0400
Message-ID: <CANzqJaA-Z3p1Bsv2EP=GCswEJG7Xjvu_ZZjuGMh=sh=_fkPO6Q@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <PN0PR01MB9069922B90966633C8183C5AC5A12@PN0PR01MB9069.INDPRD01.PROD.OUTLOOK.COM>
	<PN0PR01MB90693B1DF528D64769D81B91C5A12@PN0PR01MB9069.INDPRD01.PROD.OUTLOOK.COM>
	<[email protected]>
	<CANzqJaBA=iJ+vadW=d1b=12KCM5Aj_RDYHVZ13GDwo2jwdzR+g@mail.gmail.com>
	<[email protected]>

On Mon, Jul 15, 2024 at 5:54 PM Christoph Moench-Tegeder <[email protected]>
wrote:

> ## Ron Johnson ([email protected]):
>
> > This "lack of products" puzzles me, because DEC was doing this with VAX
> > (then Alpha and Itanium) clusters 40 years ago via a Distributed Lock
> > Manager integrated deep into VMS.  Their Rdb and (CODASYL) DBMS products
>
> Tech and trade-offs have changed over the last 40 years :)
> These days you can so many cores in one package, while "more than one
> processor" was quite a feat in the 80ies ("A dual processor VAX 11/780",
> 1982 https://dl.acm.org/doi/10.5555/800048.801738; also the 11/782 and
> 11/784), and you get so much RAM and storage (even fast storage, if
> you keep it local) with that package. Response Latency really jumps
> if you have to communicate with anything outside your box.
> While latency matters, the number of problems where you absolutely
> need that distributed lock manager has not really grown that much,
> I think.


 Customers still want High Availability, and VMS Clusters were great for
HA.

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