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#Veritas volume manager price driver

RVG (Replicated Volume Group) for VVR.

Some volobjects types that are predefined in VxVM : Volobjects are created, deleted or changed within transactions only. All volobjects has their associated operation vectors that gets activated once operations are done, either by applications or vxconfigd. These are created once a volume is created (not always). It is a representation of all Volumes and their infrastructure that are visible to users and applications.

All virtual disk devices (Volumes) are character and block devices with major no.

All these devices are character devices with major no of vxspec driver.

Vxconfigd daemon is the sole and exclusive owner of these devices.

Volume configuration service is the interface through which all changes to the volumes are performed.

#Veritas volume manager price driver

vxdmp : Is a multipathing driver and its job is to find out the various paths to the device and establish a one to many relationship between disk media (dm) and disk access(da) names.All logical processing of IO operations initiates here.

vxio : Is the first entry point for reading and writing VxVM volumes.vxspec : Responsible for configuration changes, gathering statistics, monitoring tasks, starting kernel daemons etc.vxrelocd - The hot-relocation daemon monitors VxVM for events that affect redundancy, and performs hot-relocation to restore redundancy.By default, 16 I/O threads are started at boot time, and at least one I/O thread must continue to run at all times. vxiod - VxVM I/O kernel threads provide extended I/O operations without blocking calling processes.vxconfigd - The VxVM configuration daemon maintains disk and group configurations and communicates configuration changes to the kernel, and modifies configuration information stored on disks.Renaming DMP node names (DA names)/Enclosures.Enabling/Disabling multipathing and making devices invisible to VxVM.Enabling/Disabling I/O to controller/ports/SPs/paths.