[Info-vax] Distributed Applications, Hashgraph, Automation

[Kerry Main]

> -----Original Message-----
> From: Info-vax [mailto:info-vax-bounces at rbnsn.com] On Behalf Of
> Phillip Helbig undress to reply via Info-vax
> Sent: February 15, 2018 7:22 AM
> To: info-vax at rbnsn.com
> Cc: Phillip Helbig undress to reply <helbig at asclothestro.multivax.de>
> Subject: Re: [Info-vax] Distributed Applications, Hashgraph,
Automation
> 
> In article <mailman.2.1518697085.18116.info-
> vax_rbnsn.com at rbnsn.com>,
> "Kerry Main" <kemain.nospam at gmail.com> writes:
> 
> > Just to clarify -
> >
> > While the OpenVMS community refer to its clustering arch as shared
> > everything, the industry term for the same thing is shared disk.
> 
> Other people in the industry refer to a wide variety of configurations
> as "clusters", though many offer not even the most basic of VMS
cluster
> benefits.  In a VMS cluster with shared disks, more is usually
involved
> than in other "clusters" with shared disks.
> 

While I agree with you, the really basic difference is whether the
co-ordination of writes among multiple servers is done at the OS level
(shared disk - integrated or add-on DLM) or at the App / DB layers
(shared nothing requires App logic coding and data partitioning).  

The article points out where each data sharing strengths and weaknesses
are.

Regards,

Kerry Main
Kerry dot main at starkgaming dot com