Virtual memory combines RAM and dedicated disk storage areas known as swap space. Virtual memory management software maps copies of files on disk to virtual addresses. Programs use these virtual addresses rather than real addresses to store instructions and data. Virtual memory makes it possible for the operating system (OS) to use a large range […]
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Volumes are virtual devices (virtual objects) that appear to be physical disks to applications, databases and file systems. Volumes are the VxVM software’s top-tier virtual objects. Although volumes appear to be physical disks, they do not share the limitations of physical disks. Volumes have the following characteristics: Volumes are directly addressed by the Solaris OE.
The VxVM software virtual objects built from subdisks are called plexes. A plex consists of one or more subdisks located on one or more VxVM software disks.Plexes are: Also known as submirrors Mid-tier building blocks of the VxVM software volumes Named based on the name of the volume for which it is a submirror, plus
Subdisks are contiguous blocks of space. Subdisks provide the basic building blocks for the VxVM software plexes and volumes, creating the VxVM software basic unit of storage allocation. Subdisks are virtual objects.The following characteristics apply to subdisks: Subdisk storage is allocated from the public region of a VxVM software disk. A VxVM software disk can
A named collection of VxVM software disks that share a common configuration is called a disk group. Common configuration refers to a set of records that provide detailed information about related VxVM software objects, their connections and attributes. This configuration information is stored in the private region of the VxVM software disks. A backup copy
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When a physical disk is brought under VxVM software control, it is either initialized or encapsulated. Initialized Disks Initialized disks are reformatted with either one or two partitions, and all data is destroyed. The partitions are used to store the VxVM software configuration and data areas called private and public regions. The private region is
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The VxVM software manipulates physical and virtual devices which enable the VxVM software storage management operations, as follows: Physical objects – Physical objects are physical storage devices that present raw or block device interfaces to the Solaris OE. Virtual objects – The VxVM software builds virtual objects from physical storage objects that are brought under
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The VxVM software storage management subsystem is implemented by the drivers and daemons described below. Kernel Drivers VxVM software storage management drivers include the following: vxio – The vxio driver manages access to VxVM software virtual devices. Prior to initiating an input/output (I/O) operation to one of these virtual devices, the vxio driver consults the
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Heel pain is a common symptom that has many possible causes. Although heel pain sometimes is caused by a systemic (total body) illness, such as rheumatoid arthritis or gout, it usually is a local condition that affects only the foot. This information is about heel pain that gives you soreness or tenderness on the bottom
When doing a system recovery often the things that can break your recovery procedures is having a new system that is new and completely dissimilar from the old system. This recovery procedure will walk you thru the process of creating the backup image and image restoration. Describe the recovery problem and its fixes. Assumptions: I
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