Hacker News: coolkil

New comment by coolkil in "So you want to build your own data center"

coolkil — Fri, 17 Jan 2025 22:38:07 +0000

Awesome!! Hope to see more companies go this route. I had the pleasure to do something similar for a company(lot smaller scale though)

It was my first job out of university. I will never forget the awesome experience of walking into the datacenter and start plugging cables and stuff

New comment by coolkil in "A Minecraft server written in COBOL"

coolkil — Thu, 26 Dec 2024 13:32:26 +0000

Or ask my colleague who is zos sysprog to run it on our own ;)

Or just run on zlinux

New comment by coolkil in "A Minecraft server written in COBOL"

coolkil — Thu, 26 Dec 2024 10:25:04 +0000

Lol, big question is would it work on zOS as well.

New comment by coolkil in "The weird and wonderful world of DNS LOC records (2014)"

coolkil — Mon, 29 Jul 2024 13:47:36 +0000

Firstly I never knew Loc records existed… interesting to read something like this.

Secondly I think cloudflare will see an (sizable???) increase in Loc records due to this article

New comment by coolkil in "Biggest CPU for the Bad System"

coolkil — Mon, 13 May 2024 16:44:52 +0000

Shame it is running ms sql. anything Postgress, oracle or db2 and it might have been a candidate for running on a IBM Linuxone might even be a valid contender for the cost it is currently running at.

New comment by coolkil in "New IBM LinuxONE 4 Express – Rack-mounted pre-configured Linux mainframe"

coolkil — Tue, 06 Feb 2024 22:09:15 +0000

Only for Linux guests. It is also possible to run kvm

New comment by coolkil in "New IBM LinuxONE 4 Express – Rack-mounted pre-configured Linux mainframe"

coolkil — Tue, 06 Feb 2024 22:04:35 +0000

I also think most cloud providers are at least a vendor lock-in and maybe a proprietary nightmare. This way you at least got your own iron and ibm comes to fix parts when they break. (Without disabling your system)

I do agree it is debatable whether it is beter than x86 most of the time cost savings projected when using a LinuxOne it is based on licensing. In the past oracle licenses where per core and we did a project where 8 ifl’s replaced 140 x86 cores

New comment by coolkil in "New IBM LinuxONE 4 Express – Rack-mounted pre-configured Linux mainframe"

coolkil — Tue, 06 Feb 2024 21:51:11 +0000

I worked on multiple LinuxOne systems. You can run z/vm and pr/sm. it will also run kvm if you like.

Power consumption (of our box z13 based)is 3kwh regardless of configuration (give or take) but also consider you need a lot less san switches and networking switches to achieve the same goal as a large rack of individual servers

New comment by coolkil in "OpenSSI is an open-source single-system image clustering system"

coolkil — Thu, 26 Sep 2019 20:54:07 +0000

Could be interesting. Some kind of opensource zOS parallel sysplex or zVM single system image. Shame that the last update was done in 2010. Any other known alternatives?

New comment by coolkil in "IBM introduces z15 mainframe"

coolkil — Sun, 15 Sep 2019 21:40:03 +0000

You use it in an environment where you need an extreme level of data integrity and availability. Think banks, airports, government, etc.

Due to io offloading to co-processors and a whole range of supporting cpu types you can set up a system which can handle thousands of transaction per second. Most of the application that are used on mainframe's are databases or message que's

Recently there is an increased interest in running Linux on mainframe's something which can be done since early 2000 you get the benefits of high available and secure hardware and the relative ease of Management of Linux. Another benefit is that you don't really need to train personnel in more exotic operating systems like z/OS.

New comment by coolkil in "IBM introduces z15 mainframe"

coolkil — Sun, 15 Sep 2019 19:21:15 +0000

Most commonly z/OS, z/VM as a hypervisor or just native Linux(rhel, sles, Ubuntu or Debian)

Depending on what model of mainframe you got you can use up to 60 logical partitions which are firmware level virtual machines. and can extend this functionality using z/VM or just plain KVM in a Linux environment

New comment by coolkil in "Ask HN: How do you define DevOps and is it dead?"

coolkil — Mon, 24 Apr 2017 11:48:58 +0000

I see dev-ops as a way a company has shaped its delivery process. This means a devops profession does not exist. In short it means that a developer has direct contact with an operator and tester or viceversa. Dev-ops focusses on short direct comunication which has nothing to do with technology or platform (like AWS Cloud, Azure or Google Cloud)

However technology can be used to enhance the devops delivery process. Tools like Puppet, Chef, Docker/Kubernetes can have a positive effect.

To give an answer to your question: no devops is not dead. It is a way to work.