Robert Gezelter

Computer systems and IT Consulting practice; Computer Scientist

[Robert Gezelter @RLGSC]

Mass Storage Performance Confluences and Coincidence: Things are not always what they seem

We still casually speak of "disk performance." However, the very phrasing does not match the reality ...
#OpenVMS #Storage #Performance #virtualization

https://t.co/WXunyzkd3x

[Robert Gezelter @RLGSC]

Latest Installment of Ruminations -- An IT Blog
Flash Flood Safety: Immediately Implementable Precautions

News coverage of the recent flash flooding along the Guadalupe River in Texas has focused on the tragedy and resulting political drama. ...

https://t.co/4jBIDv1R42

[Robert Gezelter @RLGSC]

I recently presented sessions on virtual machine performance, shareable libraries, ASTs, mass storage migration, and ESI (electronic evidence) at VMS Systems' 2024 #OpenVMS Bootcamp. The five slide sets are now available at: https://t.co/hIsEDKdFvC

#OpenVMSBootcamp2024

[Robert Gezelter @RLGSC]

The ICANN Board has approved the resolution reserving the DNS TLD ".INTERNAL" for internal organization use. Now one can use ".INTERNAL" for systems within the organization without fear that someone, somewhere will register the corresponding TLD. #Intranet

[Robert Gezelter @RLGSC]

@Grady_Booch Quite. Architectural choices constrain future developments in many way. Architectural choices are not about yesterday or today; they are about limits on future choices. See my 2009 IASA presentation "Forethought: The Unspoken Foundation of Evolution" at https://t.co/ICmOKLNaLD

[Robert Gezelter @RLGSC]

#HowtoGeek https://t.co/RScqWIIxh9 has a bit of a perspective problem: "All Time" begins in 1979 with the Intel 8088. Hardly. Perhaps "microprocessor CPUs" is arguable, but that ignores the 6502 of Apple II, and the Intel 8086, not to mention two decades of prior history.

[Robert Gezelter @RLGSC]

@FrancisStantech @validatrium @NaveenS16 @bensilverm @SysnettechS @FrancisStantch IMHO, there is no definitive answer. In terms of efficiency, containers are generally speaking more efficient than virtual machines. In terms of security, virtual machines have more separation, but more is not always better, also more overhead/maintenance.

[Robert Gezelter @RLGSC]

Running OpenVMS x86-64 on a virtual machine requires careful attention to network connectivity between the OpenVMS instance(s) and the outside network as well as the virtual machine host. ...

https://t.co/r9wVOl3N1N
#OpenVMS #virtualmachine

[Robert Gezelter @RLGSC]

@Grady_Booch Quite so. I have been saying "Architecture defines the limits of what a system can be." Subsetting is safe; supersetting/extensions are risky or worse.

[Robert Gezelter @RLGSC]

Tradition without foundation is not a good rationale to technical procedures.

Today's conditions make "clone and update forward" a far more appealing operational procedure than "backup; update; restore if problem".

https://t.co/QwStt4GPwr

#OpenVMS

[Robert Gezelter @RLGSC]

High-speed connectivity is critical to today's business. Impairment could easily be catastrophic. Transoceanic connections are vulnerable. https://t.co/yOUOGVjcB3 #internetconnectivity #supplychains

[Robert Gezelter @RLGSC]

Adding hinting to #OpenVMS DCL command procedures is a matter of a few lines and makes command procedure use easier. See how to add hinting: https://t.co/oihV36prBY

[Robert Gezelter @RLGSC]

@HoffmanLabs Indeed. This class of vulnerability echoes out-sourcing. Risk merely migrates "off balance sheet", where it is less perceivable. Similar syndrome to the financial crisis.

[Robert Gezelter @RLGSC]

@ianopenvmsorg Quite. Was contacted several years ago about just such a case. Software/hardware is no where as inherently reliable as physics/chemistry.

[Robert Gezelter @RLGSC]

Friday's “Revisiting Operating System Mass Storage Presumptions Enables Higher Performance and Efficiency” at IEEE Long Island's LISAT 2022 presentation and pre-print are available at https://t.co/8cMVSbnfAH #storage #performance #architecture #apis

[Robert Gezelter @RLGSC]

@jjturner @HoffmanLabs @myraccoonhands @GossiTheDog Quite. I have seen things like that so many times that it has been depressingly commonplace. My favorite was the story of the MicroVAX (acting as the DNS server) which had been walled off in a closed space with sheetrock. Reported as "found" when someone asked "Where is it?

[Robert Gezelter @RLGSC]

“Revisiting Operating System Mass Storage Presumptions Enables Higher Performance and Efficiency” has been accepted by the 2022 Long Island Systems, Applications, and Technology conference on May 6, 2022. Details at:
https://t.co/MFyVIm0PnK

[Robert Gezelter @RLGSC]

@Grady_Booch The referenced article is not clear. Is the power coming from outside, or is it generated on the property? One would be interfering with community electrification; the other makes the question somewhat irrelevant.

[Robert Gezelter @RLGSC]

@ianopenvmsorg @VMSSoftware There are many other artifacts, some dating as far back as the changeover in STARTUP at VAX/VMS V5.0 (see my OpenVMS Consultant blog series and related White Paper on https://t.co/xmxwhr3KlE

[Robert Gezelter @RLGSC]

@HoffmanLabs I keep time in 1/4 hour quanta, not too much burden. Stopping every 1/4 hour is burdensome is micromanagement at a high level. I log start/end times, not intermediate 1/4 hours.