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RE: [Linux-cluster] Snapshots with GFS1/RHEL 4 (U4)



Quoting "Caetano, Greg" <Greg Caetano hp com>:

Oliver

What does the following command show for the status of your snapshot
volume and/or device

# lvdisplay /dev/GFS/LV1

Greg,
The output is as follows

[root gfs1 Scripts]# lvdisplay /dev/GFS/LV1
  --- Logical volume ---
  LV Name                /dev/GFS/LV1
  VG Name                GFS
  LV UUID                zCkOfT-2Nua-Z3V2-GEy7-vrrs-p0IX-qu01kr
  LV Write Access        read/write
  LV snapshot status     source of
                         /dev/GFS/snap [active]
  LV Status              available
  # open                 1
  LV Size                1.56 GB
  Current LE             400
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:3

[root gfs1 Scripts]# lvdisplay /dev/GFS/snap
  --- Logical volume ---
  LV Name                /dev/GFS/snap
  VG Name                GFS
  LV UUID                KSPZxh-y9j4-h1c3-JaYo-O8FZ-2dPr-Nbv09S
  LV Write Access        read/write
  LV snapshot status     active destination for /dev/GFS/LV1
  LV Status              available
  # open                 0
  LV Size                1.56 GB
  Current LE             400
  COW-table size         100.00 MB
  COW-table LE           25
  Allocated to snapshot  0.02%
  Snapshot chunk size    8.00 KB
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:5

(I used "lvcreate -L100M -s -n snap /dev/GFS/LV1" for this particular snapshot)

Best regards,
Oliver Olsen


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