#!!!UNDER CONSTRUCTION!!!
#
#    This is not a production quality shell code,
#    Use at your own risk.
#    Whenever possible, copy-paste to the interactive shell,
#    instead of running directly.
#
#    Andrei.Ryjov@Credit-Suisse.COM aka aryzhov@spasu.net
#
#
#  Purpose: EMC 1:1 frame-to-frame host data migrations
#
#  Method:
#  In a given Vx diskgroup,
#  export the vxmake stream at plex layer, recursively down.
#  Fake the stream, replacing ctlr/trg by a destination ones.
#  Rename existing Vx objects (from plex layer down to dmdisk)
#  of the given diskgroup group to X$name. But keep the volume names!
#  Vxinit and vdxg-add new disks with non-X names, matching the Xnames.
#  Run vxmake against the fake command stream (this creates new plexes
#  with old non-X names on destination disks using original layout.
#  (i.e. all subdisks offset/len are as per source disks and Xnames).
#  Mirror (vxplex att) to new plexes, sync, detach and remove all
#  source objects (plexes, subdisks, dm_disks) with Xnames.
#
#  See the inline comments for more details.
#
#  Assumptions:
#  1.LUNs and sizes of the destination disks are exactly as on source.
#  2.Each volume consists of one plex only.
#
#
# Example:
#
#   OLDCT=c3t2d
#   NEWCT=c3t0d
#   G=opics_t_db_dg
#
#   Duplicate
#   WaitForSync
#   DetachAndClean
#

Duplicate() {

  # Generate the list of all Vx object names, recursively,
  # starting at plexes layer, down to subdisk layer
  VxObjNames=`vxprint -g$G -p -h -F%name | sort -u`

  # List the only Vx dm_disks that are actually USED in diskgrp,
  # i.e. list only the dm_disks associated with existing subdisks.
  VxDiskNames=`vxprint -g$G -s -F%disk | sort -u`

  # Generate a fake VxMake stream
  VxMakeComms=`vxprint -g$G -p -h -m | sed "s/$OLDCT/$NEWCT/g"`

  # Rename source Vx objects to X$name
  for i in $VxObjNames $VxDiskNames ; do
    vxedit -g$G rename $i X$i || return 1
  done

  # Add destination disks to the group, re-using old (pre-X) names.
  for DmName in $VxDiskNames ; do
    D=`vxprint -g$G -d -F%assoc X$DmName | sed "s/$OLDCT/$NEWCT/;s/s2$//"`1
    echo "$D \c"
    vxdisk offline $D 2>/dev/null
    echo "y\nty\n0\nla\ny\n" | format -s $D 2>&1 | grep -v expected
    /etc/vx/bin/vxdisksetup -i $D       || return 2
    vxdg -g $G adddisk $DmName=$D       || return 3
  done ; echo

  # Create the plexes on destination disks, using fake VxMakeComms.
  # Thus, layout is exactly as on source disks
  echo "$VxMakeComms" | vxmake -g$G -d - || return 4

  # Attach new plexes to the volumes associated with corresponding Xplexes
  for P in `vxprint -g$G -p -F%name | egrep -v '^X'` ; do
    vxplex -g$G att `vxprint -g$G -p -F%assoc X$P` $P &
  done
}

WaitForSync() { while [ `vxtask list | wc -l`  -gt  1 ] ; do sleep 60 ; done ; }

DetachAndClean() {
  for P in `vxprint -g$G -p -F%name | grep '^X'` ; do vxplex -g$G -o rm dis $P ; done
  for D in `vxprint -g$G -d -F%name | grep '^X'` ; do vxdg -g$G  rmdisk $D ; done
}

#---------------------------------------------------------------------------------------

OLDCT=c6t11d
NEWCT=c6t12d
G=oracle_dg
Duplicate