[Info-vax] New filesystem mentioned

[Chris Scheers]

Kerry Main wrote:
>> -----Original Message-----
>> From: Info-vax <info-vax-bounces at rbnsn.com> On Behalf Of IanD via Info-
>> vax
>> Sent: May 16, 2019 6:08 AM
>> To: info-vax at rbnsn.com
>> Cc: IanD <iloveopenvms at gmail.com>
>> Subject: Re: [Info-vax] New filesystem mentioned
>>
>> I seem to remember something about Oracle using the VMS clustering
>> goodies too but it was nothing in writing, just spoken about. Perhaps it
> was
>> something to do with them using a dlm that was similar?
>>
>> The Lustre file system makes direct mention of modeling some of it's
>> distributed lock manager off of concepts used by VMS dlm
>>
>> Like in lots of things, VMS has sat on it's outstanding technology and
> charged
>> an arm and a leg for it
>>
>> This help foster a catch up market where others had an incentive to create
>> their own.
>> One can argue as much as one likes as to the strength of VMS clustering
> but
>> other offerings are now possibly just as good or good enough and the VMS
>> premium is considered too expensive now
>>
>> What and when was the last technological advance made in VMS clustering?
>> Compare this to innovation made by others now and where clustering and
>> distributed technology innovation comes from now
>>
>> Hashgraph and related technologies might hold ways of expanding existing
>> clustering technologies with it's blistering fast transaction rates (100's
> of
>> thousands of transactions per second). Sure, it's limited by the number of
>> nodes you can gossip with in a reasonable timeframe, but I believe it's
>> around 1000 or so, so maybe it could be adapted to support VMS clusters of
>> that size?
>>
>> Perhaps there's opportunity for VMS clusters still if they can truly be a
>> backbone for distributed redundant synched data supporting high speed
>> replication or is that chasing a crowded market?
>>
>> But there's so much work to be done, this sort of cutting edge clustering
> stuff
>> could be 10 years away before being production available and I doubt I
> could
>> even imagine what other technologies might be upon us by then
>>
>> At least VSI has done more for VMS in the short time they tucked VMS under
>> their wing compared to HP who let it rot and worse, let the public think
> it had
>> no future by being vague about it's future until the 11th hour of it's
> death
>> announcement (yeah, I'm still a tiny bit bitter how HP treated VMS!!!)
> 
> Oracle's RAC clustering came from DEC's Tru64 UNIX.
> 
> The core or, at least a major portion, of DEC's Tru64 UNIX DLM came from
> OpenVMS. 
> 
> I remember internal discussions about how Tru64 UNIX's DLM was not really
> "active-active", but I think there are doc's on Internet that discusses
> this.


That's probably what I remember.

So the conversion path to the Oracle donated Linux DLM is:

	VMS => Tru64 => Oracle RAC => Linux

It's not surprising that it looks VMSish.

-- 
-----------------------------------------------------------------------
Chris Scheers, Applied Synergy, Inc.

Voice: 817-237-3360            Internet: chris at applied-synergy.com
   Fax: 817-237-3074