5.13.2 Increasing the Size of the root File System

This procedure describes how to increase the size of the system partition and / (root) file system.

This procedure is performed while the file system remains online.

Note:

There are two system partitions, LVDbSys1 and LVDbSys2. One partition is active and mounted. The other partition is inactive and used as a backup location during upgrade. The size of both system partitions must be equal.

Keep at least 1 GB of free space in the VGExaDb volume group. The free space is used for the LVM snapshot created by the dbnodeupdate.sh utility during software maintenance. If you make snapshot-based backups of the / (root) and /u01 directories as described in "Creating a Snapshot-Based Backup of Oracle Linux Database Server," then keep at least 6 GB of free space in the VGExaDb volume group.

1. Collect information about the current environment.
   1. Use the df command to identify the amount of free and used space in the root partition (/)

      # df -h /
      

      The following is an example of the output from the command:

      Filesystem            Size  Used Avail Use% Mounted on
      /dev/mapper/VGExaDb-LVDbSys1
                             12G  5.1G  6.2G  46% / 
      

      Note:

      The active root partition may be either LVDbSys1 or LVDbSys2, depending on previous maintenance activities.

   2. Use the lvs command to display the current logical volume configuration.

      # lvs -o lv_name,lv_path,vg_name,lv_size
      

      The following is an example of the output from the command:

      LV        Path                   VG      LSize 
      LVDbOra1  /dev/VGExaDb/LVDbOra1  VGExaDb 10.00g
      LVDbSwap1 /dev/VGExaDb/LVDbSwap1 VGExaDb  8.00g
      LVDbSys1  /dev/VGExaDb/LVDbSys1  VGExaDb 12.00g
      LVDbSys2  /dev/VGExaDb/LVDbSys2  VGExaDb 12.00g 
      

2. Verify there is available space in the volume group VGExaDb using the vgdisplay command.

   # vgdisplay VGExaDb -s
   

   The following is an example of the output from the command:

   "VGExaDb" 53.49 GiB [42.00 GiB used / 11.49 GiB free]
   

   The volume group must contain enough free space to increase the size of both system partitions, and maintain at least 1 GB of free space for the LVM snapshot created by the dbnodeupdate.sh utility during upgrade. If there is not sufficient free space in the volume group, then add a new disk to LVM.

3. Resize both LVDbSys1 and LVDbSys2 logical volumes using the lvextend command.

   # lvextend -L +size /dev/VGExaDb/LVDbSys1
   # lvextend -L +size /dev/VGExaDb/LVDbSys2
   

   In the preceding command, size is the amount of space to be added to the logical volume. The amount of space added to each system partition must be the same.

   The following example extends the logical volumes by 10 GB:

   # lvextend -L +10G /dev/VGExaDb/LVDbSys1
   # lvextend -L +10G /dev/VGExaDb/LVDbSys2
   

4. Resize the file system within the logical volume using the resize2fs command.

   # resize2fs /dev/VGExaDb/LVDbSys1
   # resize2fs /dev/VGExaDb/LVDbSys2
   

5. Verify the space was extended for the active system partition using the df command.

   # df -h /