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Hot add RAM and CPU

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Hot add RAM and CPU - 27.Dec.2010 11:54:27 PM   
Scott Lowe

 

Posts: 444
Joined: 13.May2010
Status: offline
I recently wrote a blog posting outlining the steps you need to take to enable VMware ESX/ESXi's ability to hot add RAM and virtual CPUs to a running virtual machine. Although VMware's compatibility documentation indicates that certain operating systems don't support hot plugging new CPUs, it appears to work for some of them anyway.

If you've successfully hot added RAM or CPU to a running virtual machine, respond to this post with your operating system, edition (standard, enterprise, etc), service pack level/kernel version, and architecture (32/64-bit). If enough people respond, I'll compile all of the results into a usable format and republish it.

Scott
Post #: 1
RE: Hot add RAM and CPU - 18.Feb.2011 6:58:57 PM   
JustinC71

 

Posts: 36
Joined: 29.Jun.2010
From: VA
Status: offline
Honestly I've only tried this with Server 2008 R2, but I'm sure most know that works.  I'd be interested to see a list if you get some responses though.

(in reply to Scott Lowe)
Post #: 2
RE: Hot add RAM and CPU - 23.Feb.2011 12:23:23 AM   
Scott Lowe

 

Posts: 444
Joined: 13.May2010
Status: offline
I'd love to get some real-world information on this one and compile it into a comprehensive blog posting. So, if you know of anyone that's done this, point 'em here! :-)

Personally, I love hot add... makes it easy to be a bit conservative on resources at the front end and adjust as necessary.

Scott

(in reply to JustinC71)
Post #: 3
RE: Hot add RAM and CPU - 28.Feb.2011 9:17:24 PM   
Scott Lowe

 

Posts: 444
Joined: 13.May2010
Status: offline
All,

A caveat to the ability to hot add RAM and processors. First of all, your operating system has to support the hot add process. Second, you need to be running version 7 of the virtual hardware in vSphere. Version 4 hardware doesn't support hot add.

Scott

(in reply to Scott Lowe)
Post #: 4
RE: Hot add RAM and CPU - 13.Oct.2011 9:38:20 PM   
shenglu

 

Posts: 3
Joined: 12.Oct.2011
Status: offline
I just tried with Server 2008 R2, this, but I'm sure most people know that works. I am interested to see a list although if you get some response.

_____________________________

Gadgets | Flash Memory

(in reply to Scott Lowe)
Post #: 5
RE: Hot add RAM and CPU - 21.Oct.2011 3:46:45 PM   
atc

 

Posts: 66
Joined: 19.Oct.2011
Status: offline
Seems like only certain version of Linux can support cpu hot add.

I would like to know which works and which does not also.

(in reply to shenglu)
Post #: 6

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