[Info-vax] VSI strategy for OpenVMS

[Arne Vajhøj]

On 9/14/2021 10:08 AM, Bill Gunshannon wrote:
> On 9/13/21 8:09 PM, Arne Vajhøj wrote:
>> On 9/13/2021 4:57 PM, Scott Dorsey wrote:
>>> Phillip Helbig (undress to reply) <helbig at asclothestro.multivax.de> 
>>> wrote:
>>>> In article <sho5ts$lt3$1 at dont-email.me>, Dave Froble
>>>> <davef at tsoft-inc.com> writes:
>>>>
>>>>> Yes, there are multiple reasons to run a VMS cluster.  But compute
>>>>> resources for the most part is no longer one of those reasons.
>>>>
>>>> There are certainly many big VMS customers who run clusters partly for
>>>> increased computing power.  Of course, disaster tolerance, rolling
>>>> upgrades, and so on are also reasons.
>>>
>>> In the case of web services, clusters get you improved reliability, more
>>> CPU, but most importantly more I/O.  The thing is, few people are using
>>> VMS for web services, and that's a shame because it's something where it
>>> could do well.
>>
>> I find that hard to see.
>>
>> Web services need:
>> * low cost HW
>> * low cost OS & web SW
>> * uptodate web SW
> 
> And very efficient I/O.

Very efficient network IO.

The web services should be all in memory with practically
no disk IO.

Disk IO becomes relevant back at the data/persistence/storage
tier.

Arne