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Oracle VM Server for SPARC 2.2 Administration Guide Oracle VM Server for SPARC |
Part I Oracle VM Server for SPARC 2.2 Software
1. Overview of the Oracle VM Server for SPARC Software
2. Installing and Enabling Software
3. Oracle VM Server for SPARC Security
4. Setting Up Services and the Control Domain
How to Export a Virtual Disk Back End Multiple Times
How to Change Virtual Disk Options
How to Change the Timeout Option
Virtual Disk Identifier and Device Name
How to Export a Physical Disk as a Virtual Disk
How to Export a Physical Disk Slice as a Virtual Disk
File or Volume Exported as a Full Disk
How to Export a File as a Full Disk
How to Export a ZFS Volume as a Full Disk
File or Volume Exported as a Single-Slice Disk
How to Export a ZFS Volume as a Single-Slice Disk
Exporting Volumes and Backward Compatibility
Summary of How Different Types of Back Ends Are Exported
Guidelines for Exporting Files and Disk Slices as Virtual Disks
Configuring Virtual Disk Multipathing
Virtual Disk Multipathing and Virtual Disk Timeout
How to Configure Virtual Disk Multipathing
How to Export a CD or DVD From the Service Domain to the Guest Domain
How to Export an ISO Image From the primary Domain to Install a Guest Domain
Virtual Disk and the format Command
Configuring a ZFS Pool in a Service Domain
Examples of Storing Disk Images With ZFS
How to Create a Disk Image Using a ZFS Volume
How to Create a Disk Image Using a ZFS File
How to Assign the ZFS Volume or File to a Guest Domain
Creating a Snapshot of a Disk Image
How to Create a Snapshot of a Disk Image
Using Clone to Provision a New Domain
Using Volume Managers in a Logical Domains Environment
Using Virtual Disks on Top of Volume Managers
Using Virtual Disks on Top of Solaris Volume Manager
Using Virtual Disks When VxVM Is Installed
Using Volume Managers on Top of Virtual Disks
Using ZFS on Top of Virtual Disks
Using Solaris Volume Manager on Top of Virtual Disks
Using VxVM on Top of Virtual Disks
11. Managing Domain Configurations
12. Performing Other Administration Tasks
Part II Optional Oracle VM Server for SPARC Software
13. Oracle VM Server for SPARC Physical-to-Virtual Conversion Tool
14. Oracle VM Server for SPARC Configuration Assistant (Oracle Solaris 10)
15. Using the Oracle VM Server for SPARC Management Information Base Software
16. Logical Domains Manager Discovery
17. Using the XML Interface With the Logical Domains Manager
By default, if the service domain providing access to a virtual disk back end is down, all I/O from the guest domain to the corresponding virtual disk is blocked. The I/O automatically is resumed when the service domain is operational and is servicing I/O requests to the virtual disk back end.
However, there are some cases when file systems or applications might not want the I/O operation to block, but for it to fail and report an error if the service domain is down for too long. It is now possible to set a connection timeout period for each virtual disk, which can then be used to establish a connection between the virtual disk client on a guest domain and the virtual disk server on the service domain. When that timeout period is reached, any pending I/O and any new I/O will fail as long as the service domain is down and the connection between the virtual disk client and server is not reestablished.
This timeout can be set by doing one of the following:
Using the ldm add-vdisk command.
ldm add-vdisk timeout=seconds disk-name volume-name@service-name ldom
Using the ldm set-vdisk command.
ldm set-vdisk timeout=seconds disk-name ldom
Specify the timeout in seconds. If the timeout is set to 0, the timeout is disabled and I/O is blocked while the service domain is down (this is the default setting and behavior).
Alternatively, the timeout can be set by adding the following line to the /etc/system file on the guest domain.
set vdc:vdc_timeout=seconds
Note - If this tunable is set, it overwrites any timeout setting done using the ldm CLI. Also, the tunable sets the timeout for all virtual disks in the guest domain.