[Info-vax] free shell accounts?

[Kerry Main]

> From: Info-vax [mailto:info-vax-bounces at info-vax.com] On Behalf Of
> Stan Radford
> Sent: 23-Jan-15 8:02 AM
> To: info-vax at info-vax.com
> Subject: Re: [New Info-vax] free shell accounts?
> 
> Hi Simon. Thanks I am familiar with sharing devices and maintaining
> integrity across volumes, files, etc. From all the answers I see I should
> have asked more directly about deathrow and what benefits the cluster
> brought to hobby users vs. a conventional system of load balancing that
> could route users to similar boxes in a failover configuration. But thanks
> for taking the time to fill me in on some of the issues in VMS.
> 
> I'm not interested in cluster per se because I'm not looking at VMS for
> production. I'm just looking for new technical horizons and anyway
> information about how something successful works is always worth
> hearing.
> 
> Regards,
> 
> Stan

>From a technical perspective, remember that there are typically two
different clustering technologies used by various OS platforms:

1. Shared nothing (one writer, many readers, writes coordinated by
the designated writer)

2. Shared everything (many writers, many readers with distributed 
lock management coordinating writes between OS hosts)

UNIX, Linux, Windows, NonStop use option 1 - shared nothing

OpenVMS, Oracle RAC use Option 2 - shared everything. (Oracle RAC
evolved from Tru64 UNIX clustering which is a subset of OpenVMS 
clustering)

A good whitepaper on the different strategies can be found here:
http://www.scaledb.com/pdfs/WP_SDvSN.pdf

Regards,

Kerry Main
Back to the Future IT Inc.
 .. Learning from the past to plan the future

Kerry dot main at backtothefutureit dot com