06-12-2013 06:05 AM - edited 06-12-2013 09:59 AM
Allo, can anyone point me towards latest offical hp docs with recommended swap size for 11.31 vmhosts?
The current install i'm working on is 1x ram
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 131008 0 131008 0% 0 - 1 /dev/vg00/lvol2
reserve - 1740 -1740
memory 124568 75824 48744 61%
In the past i've used 2 x ram , which peeps have been saying is outdated for a while now.
But I read in another post
"We found it documented and actually it was true that when you are hosting VMs you will need swap space equal to twice the sizes of the VMs you want active simultaneously"
Just wondering what the official line is these days.
06-12-2013 08:48 AM - edited 06-12-2013 09:50 AM
>The current install I'm working on is 1x ram
This already is way too much for 128 GB.
>But I read in another post
What is the URL to that post?
06-12-2013 09:42 AM - edited 06-12-2013 09:44 AM
The link to the thread is - swap space size with big memory
Lots of people have a rule of thumb or personal preference on this, but with single blades now having more ram than superdomes i've worked on, i'm wondering what the official line/best practice is now for vmhosts.
Thanks in advance.
06-12-2013 09:47 AM
Current recommendations are in the Integrity VM & vPars v6.2 Admin Guide on page 37:
• Disk space for each guest operating system, including swap space
NOTE: The VSP requires swap space only as recommended by HP-UX 11i v3.
Otherwise, no swap space is required for Integrity VM.
In other words, configure enough swap for the VM Host system itself as you would any other HP-UX server. You do not need to configure swap space on the VM Host for each VM guest that will run on the host, assuming you're running a recent version of Integrity VM.
06-12-2013 09:50 AM - edited 06-12-2013 10:12 AM
>The link to the thread is ...
Unfortunately Ken never replied where he saw that documented. :-(
And now Dave has refuted it.
>configure enough swap for the VM Host system itself as you would any other HP-UX server.
Where is that "any other" documented?
06-12-2013 10:05 AM
"The VSP requires swap space only as recommended by HP-UX 11i v3"
The way I read that statement is that the swap requirements of the VSP are just like any other HP-UX 11i v3 server. We no longer require you to configure extra swap space for VM guests on the VSP. That requirement was removed as of Integrity VM v4.1. Looking at the v4.1 Release Notes:
3.2.8 No Swap Space Required for Guest Allocation
The Integrity VM Version 4.1 VM Host requires swap space only as recommended by HP-UX 11i v3. Otherwise, no swap space is required for Integrity VM V4.1.
06-12-2013 10:14 AM
>just like any other HP-UX 11i v3 server.
What I was asking where is the "any other" documented/recommended?
I.e. George's next question. :-)
06-12-2013 10:23 AM
>What I was asking where is the "any other" documented/recommended?
I.e. George's next question. :-)
Yep that would be it :-)
This is not my build, i'll just be the monkey supporting it once it's live, so this is more out of curiosity to see how the recommended settings have changed and a chance to update my docs.
Last time I came out of my cave I found out the world wasn't flat! :-)
06-12-2013 10:26 AM
HP-UX 11i v3 Installation and Update Guide
HP Integrity Server Blades, HP Integrity Servers, and
HP 9000 Servers
Page 11 - Disk space requirements for a cold install
Table 3 on page 12 lists minimum disk space recommendations, including swap space