OpenVMS Notes: Linux
Edit: 2019-02-06 (split this page into five)
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Introduction (Linux on an OpenVMS information
Okay so everyone reading this already knows that
OpenVMS is an operating
system that competes with Unix and
Linux so why did I include this
topic as part of OpenVMS Notes?
- We were running MariaDB-5.5-25 on OpenVMS and where experiencing shutdown-related
problems associated with very large databases using the XtraDB Engine (which
masquerades as the InnoDB Engine). Many self-support blogs claim these issues
can be fixed by upgrading to MariaDB-10 which is not (yet) available on OpenVMS.
So setting up a nearby Linux box with MariaDB-10.1-19 on it would allow us to
verify if the problem was fixed
note-1: we only intended to test "MariaDB-10 on Linux" from our OpenVMS
business system. All you need
to do is modify the client connect strings on the OpenVMS side to send requests
to the Linux box via a private network. We
opted to use an OpenVMS "logical name". Easy-peasy!
note-2: our test results were so impressive that we never went
back. Our primary business system still runs OpenVMS but now relies upon
a MariaDB database hosted by a Linux platform. IMHO this heterogeneous
solution is not much different from running an OpenVMS which depends
upon a SAN (storage area network) or NAS (network attached storage)
- Computer industry know-it-alls assert that every computer professional should
be familiar with at least five computer languages and/or scripting environments.
A similar case could be made for familiarity with 3-4-5 operating systems. These
additional skills should translate directly into increased job security and
employability (Happy Wife = Happy Life).
- Linux is the fastest growing computer ecosystem with 50% of all the computer
systems on the planet are already running some sort of Linux. Got an Android
phone? Android is a stripped-down version of Linux.
OpenVMS-Linux System Hybrid (heterogeneous computing)
as of 2017.01.xx
- MariaDB-5.5-25 (the latest version of MariaDB for
OpenVMS) experiences long shutdown problems when running large InnoDB (er, XtraDB) tables for longer than a month
- experiments with MariaDB-10.1-19 on CentOS-7 were better than all expectations
- so we permanently moved our production MariaDB files from OpenVMS to CentOS-7 and connect
via a private TCP/IP network running 1000 Mb/s
as of 2018-08-xx
| server : HPE rx2800-i2 | | server : HP DL385p-gen8 |
| OS : OpenVMS-8.4 | | OS : CentOS-7 |
| client : MariaDB-5.5-60 | ! server : MariaDB-10.3.11 |
| net-1 : TCP/IP +-----+ net-1 : TCP/IP |
private ------+ net-2 : TCP/IP | +--------------------------+
intranet | net-3 : DECnet +---> hub to other OpenVMS systems
| net-4 : DECnet +---> Windows-7 PC (host for offsite backups)
Kitchener - Waterloo - Cambridge,