LVM Volume Group Dynamic LUN Expansion (DLE) and Contraction (DLC) (September 2009)

Command line options.................................................................................................................... 50
Command usage ........................................................................................................................... 51
Online DLE to increase the space available for user data ................................................................ 51
Online DLE to increase the space available for LVM configuration data ............................................ 51
Online reprovisioning to increase the maximum volume group size .................................................. 51
Online DLC to decrease the space used by a physical volume ......................................................... 52
Online reprovisioning to decrease the maximum volume group size ................................................. 52
Online vgmodify ............................................................................................................................ 52
Prerequisites .............................................................................................................................. 52
Online DLE ................................................................................................................................ 52
Online DLC................................................................................................................................ 53
Online reprovisioning to increase the maximum volume group size .................................................. 53
Online reprovisioning to decrease the maximum volume group size ................................................. 54
Common Version 2.x examples ....................................................................................................... 54
Online DLE examples.................................................................................................................. 55
Online reprovisioning examples ................................................................................................... 61
Online DLC examples ................................................................................................................. 68
LVM vgmodify Messages for Version 2.x volume groups..................................................................... 76
For More Information ......................................................................................................................... 80
Call to action .................................................................................................................................... 80