Sunday May 03, 2009

Improving integration of LDoms and FMA

Scott Davenport recently posted a blog entry announcing the availability of Solaris 10 Update 7 (aka Solaris 10 5/09 or just s10u7), and touted some of the FMA improvements in the release. Of particular interest for LDoms and its users are improvements in diagnosis of IO faults when one or more IO root complexes are allocated to domains other than the control domain (i.e. so-called root domains). These improvements were designed & developed through a collaborative effort between the LDoms & FMA teams. The collaboration between these teams is nothing new; even before the initial release of Logical Domains technology in April 2007, as well as ever since, there has been tight coordination between LDoms and FMA, both in terms of the technology, and the teams.

The changes needed to resolve the IO diagnosis problems required new interfaces between the FMA and LDoms code, as well as new software on both sides of the interface. As Scott mentioned, the FMA software is now available in the Solaris 10 5/09 release. However, the necessary changes on the LDoms side (in the LDoms Manager) will be available in the upcoming 1.2 release of Logical Domains, currently scheduled for this summer. That's no reason not to install s10u7 in a Logical Domains environment now; all currently supported versions of LDoms will function correctly with s10u7 installed in a control domain, guest domains, or both. And once LDoms 1.2 is released, simply installing the new firmware & LDoms Manager that make up the 1.2 update on a system running s10u7 will automatically enable the improved IO diagnosis features (along with several other new LDoms features, but that's the subject of another post).

Wednesday Dec 24, 2008

LDoms 1.1

Just in time for the holidays, LDoms version 1.1 is now available! This is a major new release of Logical Domains technology, with an extensive list of new features & bugfixes. Here are the highlights:

Major Features Introduced in LDoms version 1.1:

  • Warm and Cold Migration
  • Network NIU Hybrid IO
  • VLAN Support for Virtual Network Interface and Virtual Switch
  • Public XML Interface and XMPP Connection with the Domain Manager
  • Virtual IO DR
  • Virtual Disk Multipathing and Failover
  • Virtual Switch Support for Link Aggregated Interface
  • iostat(1M) Support in Guest Domains

Alex has more details on these features here.

Other Improvements Include:

  • Improved Interrupt Distribution (CR 6671853)
  • Performance improvements for virtual IO (CR 6689871, 6640564)
  • Solaris Installation to Single Slice Disk (CR 6685162)
  • Numerous Improvements and Extension to our Domain Services Infrastructure (CR 6560890)
  • Improved Console Behavior when not using Virtual Console (CR 6581309)
  • VDisk EFI Label Support for Disk Image (CR 6558966)
  • VDisk Support for Disk Managed by Multipathing Software (Veritas DMP, EMC Powerpath) (CR 6694540, 6637560)
  • LDoms Manager Improvements to IO FMA (CR 6463270)
  • ldm list -l now displays MAC assigned to guest (CR 6586046)
  • Improved Error Messages (CR 6741733, 6590124, 6715063)
  • ldm list -o provides fine-grained control of configuration display options (CR 6562222)
  • More accurate utilization percentage reporting (CR 6637955, 6709020)
  • Can now explicitly set a domain's hostid (CR 6670605)
  • Improved persistence of VIO service and VDS volume names (CR 6729544, 6771264)
  • More predictable behavior when deciding which cpus to DR out of a domain (CR 6567372)
  • More accurate annotations in ldm ls-spconfig output (CR 6744046)
  • Better support for large, fragmented memory configs in a domain (CR 6749507)
  • Supports setting persistent WANboot keys from OBP (CR 6510365)
  • Lots of Bug Fixes (over 100)

Get it here!

Monday May 19, 2008

LDoms 1.0.3

Logical Domains (LDoms) 1.0.3 is now available. This release is mainly intended to enable many new features included in Solaris 10 5/08 (aka update 5). Jason did an excellent job with details & logistics in this blog entry, so there's no need in my repeating that info here.

One thing I do want to mention in terms of LDom Manager functionality is that with this release, the XML format produced by the

ldm ls-constraints -x
command has changed. While the LDom Manager will continue to accept our previous, so-called v2 XML format, as of 1.0.3, it also accepts & produces the new v3 format. This format is designed to closely align with the schema defined as part of the draft Open Virtual Machine Format (OVF) specification.

This is just the tip of the iceberg. Coming in LDoms 1.1 (currently targeted for release in Q4CY08) will be a complete XML based control interface for monitoring & managing Logical Domains, based on this same v3 schema. In addition, it will utilize the XMPP transport, providing secure, standards-based XML messaging between client application & the LDom Manager.

This combination of a standards-based schema over a standard XML transport provides a rich control interface for creating management applications. More details about this new management interface, including detailed specifications, will be forthcoming.

Thursday Oct 11, 2007

UltraSPARC T2 & LDoms 1.0.1

Sun is officially announcing the first products in its UltraSPARC T2 (US T2) based platform lineup today, the T5x20 series. You can read all about the details here and here. There are two big stories here related to our Logical Domains technology. For those of you who are new to my blog, Logical Domains (LDoms for short) is the name of Sun's virtualization technology for our SPARC CMT platforms that allows multiple operating systems to run concurrently on a single system.

These products represent the first of our CMT based platforms that are shipping with LDoms technology pre-installed from the factory. All future CMT servers from Sun will ship with the ability to run Logical Domains out of the box. This includes the LDoms-enabled hypervisor (our LDoms hypervisor runs on bare metal, and is embedded in the firmware of the platform), all the necessary Solaris components, and the LDoms Manager package (which is what my team works on).

This further represents the introduction of version 1.0.1 of LDoms technology. Besides support for the new US T2 based platforms (and a slew of bug fixes), this release supports the ability to reset any domain, even one which owns physical I/O devices, while all other domains continue to run. Even the control domain, i.e. the one on which the LDoms Manager runs, can reboot while all other domains stay up. This represents a major step forward in terms of RAS capability for LDoms.

As of today, LDoms version 1.0.1 is only available pre-installed on our newly announced US T2 based servers. Stay tuned here for information on the impending availability of this upgrade on our existing US T1 based platforms!

UPDATE: LDoms version 1.0.1 is now available for download here. This includes the firmware updates for US T1 platforms.

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

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