4 ms·
Remind me of how IBM positions mainframes: they are so highly available that you simply never let them shut down.
by redwood 6y ago
Remind me of how IBM positions mainframes: they are so highly available that you simply never let them shut down.
- lasereyes136 6y agoIBM Mainframes are designed to be serviced while running so if you have multiple CPUs you can offline one at a time for upgrade it without the whole mainframe going down. Big Sun Solaris boxes where built like at as well. If your mainframe had only one CPU, you did have to turn it off in order to service it. But you could upgrade the OS without turning it off. While they aren't cool tech now, mainframes are a marvel of hardware engineering.
- chasd00 6y agoplus, i would imagine turning them on and bringing them online isn't just a press of a button.
- MrMorden 6y agoIt's not. https://web.archive.org/web/20190324191654/https://www.ibm.com/support/knowledgecenter/zosbasics/com.ibm.zos.zsysprog/zsysprogc_initialization.htm https://web.archive.org/web/20190324191654/https://www.ibm.c... (archive.org link because ibm.com apparently isn't hosted on a mainframe.)