HowTo_ExtendMirrorDisk.md

Overview

In ECX 4.2, you can extend mirror disk data partition size dynamically without stopping application.

This guide shows how to extend mirror disk data partition size dynamically

Note

On Linux, the data partition should be LVM, and its filesystem should be xfs.

On Windows, there is no limitation.

How to extend mirror disk data partition size

1. On standby server, execute clpmdctrl --resize command

   • On Linux

   > clpmdctrl --resize [the new size of data paritition] [md resource name]
   
   e.g.
   > clpmdctrl --resize 5G md1
   

   • On Windows

   > clpmdctrl --resize [md resource name] [the new size of data paritition]
   
   e.g.
   > clpmdctrl --resize md1 5G
   

   Tips for specifying disk size

   • K (Kibi byte)
   • M (Mibi byte)
   • G (Gibi byte)
   • T (Tebi byte)

2. On active server, execute clpmdctrl --resize command

   Pleaes execute the same command as Step 1

3. On active server, extend the filesystem of the data partition

   • On Linux

     1. Extend the filesystem

        xfs_growfs [mount point of mirror disk]
        
        e.g.
        xfs_growfs /mnt/md1
        

   • On Windows

     1. Open Command Prompt
     2. Open diskpart

        > diskpart
        

     3. Confirm the volume number of the data partition

        e.g.
        DISKPART> list volume
        
        Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
        ----------  ---  -----------  -----  ----------  -------  ---------  --------
        Volume 0     D   SSS_X64FRE_  UDF    DVD-ROM     4618 MB  Healthy
        Volume 1         System Rese  NTFS   Partition    549 MB  Healthy    System
        Volume 2     C                NTFS   Partition     39 GB  Healthy    Boot
        Volume 3     E                RAW    Partition   1024 MB  Healthy
        Volume 4     F   New Volume   NTFS   Partition   5000 MB  Healthy
        

     4. Select the volume number of the data partition

        DISKPART> select volume [the volume number]
        
        e.g.
        DISKPART> select volume 4
        

     5. Extend the filesystem

        DISKPART> extend filesystem
        

     6. Exit diskpart

        DISKPART> exit