Logical Domains 1.2
There is a new version of the Logical Domains available. The version 1.2 of the LDOMs gives you some new interesting features. You can download it here. The Release Notes for 1.2 are available at docs.sun.com. To give you a short overview to the new features, i´ve extracted the relevant passages out of the documentation.
- Support for CPU power management.
- Support for jumbo frames.
The Logical Domains virtual switch (vsw) and virtual network (vnet) devices can now support Ethernet frames with payload sizes larger than 1500 bytes. This change results in these drivers being able to increase network throughput.
- Restriction of delayed reconfiguration operations to the control domain.
The Logical Domains Manager 1.2 software restricts delayed reconfiguration operations to the control domain. For all other domains, you must stop the domain to modify the configuration unless the resource can be dynamically reconfigured.
- Support for configuring domain dependencies.
You can use the Logical Domains Manager to establish dependency relationships between domains. A domain that has one or more domains that depend on it is called a master domain. A domain that depends on another domain is called a slave domain.
Each master domain can specify what happens to its slave domains in the event that the master domain fails. For instance, if a master domain fails, it might require its slave domains to panic. If a slave domain has more than one master domain, the first master domain to fail triggers its defined failure policy on all of its slave domains.
- Support for autorecovery of configurations.
Starting with the Logical Domains 1.2 release, a copy of the current configuration is automatically saved on the control domain whenever the Logical Domains configuration is changed. This autosave operation enables you to recover a configuration when the configurations that are saved on the SP are lost. This operation also enables you to recover a configuration when the current configuration was not explicitly saved to the SP when the system powercycled.
- Support for export of same backend multiple times.
A virtual disk backend can be exported multiple times either through the same or different virtual disk servers. Each exported instance of the virtual disk backend can then be assigned to either the same or different guest domains. When you mount such devices read/write on two different paths, the applications have to enforce the consistency. Without such means mounting r/w from different locations is a sure way to the tapes ;)
- API to support LDMD discovery.
Logical Domains Managers can be discovered on a subnet by using multicast messages. The ldmd daemon is able to listen on a network for a specific multicast packet. If that multicast message is of a certain type, ldmd replies to the caller. This enables ldmd to be discovered on systems that are running Logical Domains.
- Support for physical-to-virtual migration tool.
The Logical Domains P2V Migration Tool automatically converts an existing physical system to a virtual system that runs in a logical domain on a chip multithreading (CMT) system. The source system can be any of the following:
- Any sun4u SPARC system that runs at least the Solaris 8 Operating System</il>
- Any sun4v system that runs the Solaris 10 OS, but does not run in a logical domain</il></ul>
- Support for configuration assistant tools.The Logical Domains Configuration Assistant leads you through the configuration of a logical domain by setting basic properties.
- Bug Fixes