LDoms versions & compatibility

With the release of LDoms 1.0.1 last October, along with the release of the first members of our UltraSPARC T2 (US T2) based platform family, issues of version compatibility naturally arise. When I first posted about the availability of LDoms 1.0.1, I included the following caveats:

WARNING: There are two important caveats when upgrading from LDoms 1.0 to LDoms 1.0.1:

  • Configurations saved to the service processor under 1.0 are not usable under 1.0.1. The LDoms 1.0.1 Administration Guide describes the upgrade procedure that needs to be applied to work around this. Part of this procedure needs to be carried out BEFORE performing the actual upgrade!
  • You must upgrade both the firmware and LDom Manager components at the same time.

One of the pillars of Sun's products is our ability to maintain compatibility; we have explicit practices & processes in place to guarantee compatibility between product releases. Unfortunately, we did not apply those to the 1.0.1 LDoms upgrade. This was an omission we do not intend to repeat. So, when upgrading from LDoms 1.0 to any subsequent version, the caveats mentioned above do apply (the current LDoms release is still 1.0.1, but we are planning for two follow-on releases in CY 2008).

As we wrap up the development phase of our upcoming 1.0.2 release, we're re-verifying that existing configurations created under 1.0.1 do continue to work under 1.0.2, and that firmware & LDom Manager upgrades do not need to be synchronized. Of course, certain 1.0.2 capabilities might not be fully enabled until both the firmware & the LDom Manager are upgraded, but at least the system will continue to function with only one or the other upgraded.

UPDATE 4/29/2008: With the release of LDoms 1.0.2, I'm happy to report that neither of the caveats described in this entry apply when upgrading from LDoms 1.0.1 to LDoms 1.0.2. However, they do still apply if you're upgrading from LDoms 1.0 to LDoms 1.0.2 (or any subsequent release). In other words, these compatibility issues only come into play when upgrading from LDoms 1.0 to a subsequent release.

Comments:

Thanks for the continuing look into the LDOM environment. I'm particularly interested in two things I've seen mentioned here and in other blogs.
1) the T1 boxes at least had split bus available to configure two I/O domains. the T5x20 so far are less capable in this respect (ability to separate or isolate storage I/O in particular). You mention in one entry that "PCI-E hybrid I/O support is on our roadmap, which will permit individual PCI-E leaf devices to be assigned to different domains. This will enable many more I/O domains to be created."
2) Being able to provide a slice, or better yet, a soft partition from the I/O domain to a guest domain as a network installable boot device.

Are either these features going to be in seen 1.0.2, or a near term update?
Thanks.

Posted by Jim Willey on December 10, 2007 at 09:14 AM EST #

Post a Comment:
Comments are closed for this entry.
About

I work on the Oracle VM Server for SPARC (nee LDoms) team.

View Eric Sharakan's profile on LinkedIn

Search

Categories
Archives
« April 2014
SunMonTueWedThuFriSat
  
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
   
       
Today