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File systems for WAS MQ

WAS file system for MQ

The following shows how to add logical volumes and filesystems for use by MQ on an AIX system. The procedure uses command-line, but you can also create using smit. For reference, use: 10.60.102.14

1. Log on to target 10.45.110.86 as user root

2. First confirm disk is part of volume group

   root@mhost / # lsvg -p appvg
   appvg:
   PV_NAME           PV STATE          TOTAL PPs   FREE PPs    FREE DISTRIBUTION
   hdisk0            active            399         399         80..80..79..80..80
   

3. Next, determine how many free physical partitions we have to work with

   root@mhost / # lspv hdisk0
   PHYSICAL VOLUME:    hdisk0                   VOLUME GROUP:     appvg
   PV IDENTIFIER:      00c609d7bdbe5686 VG IDENTIFIER     00c609d700004c0000000141bdbe56dc
   PV STATE:           active
   STALE PARTITIONS:   0                        ALLOCATABLE:      yes
   PP SIZE:            256 megabyte(s)          LOGICAL VOLUMES:  0
   TOTAL PPs:          399 (102144 megabytes)   VG DESCRIPTORS:   2
   FREE PPs:           399 (102144 megabytes)   HOT SPARE:        no
   USED PPs:           0 (0 megabytes)          MAX REQUEST:      512 kilobytes
   FREE DISTRIBUTION:  80..80..79..80..80
   USED DISTRIBUTION:  00..00..00..00..00
   MIRROR POOL:        None
   

4. Create logical volumes, filesystems, then mount.

   For mklv we calculate size based on no of PP's and size. For example, if appvg has a pp size of 256Mb, for a 40 GB filesystem we need 160 PPs.

   echo "Making logical volumes"
   mklv -y fslv01 -t jfs2 appvg 120 hdisk0
   mklv -y fslv02 -t jfs2 appvg 120 hdisk0
   
   echo "Making filesystems"
   crfs -v jfs2 -d fslv01 -m /usr/mqm -A yes -p rw -a agblksize=4096 -a isnapshot=no
   crfs -v jfs2 -d fslv02 -m /var/mqm -A yes -p rw -a agblksize=4096 -a isnapshot=no
   
   echo "Mounting filesystems"
   mount /usr/mqm
   mount /var/mqm

   To erase your work...

   unmount /usr/mqm
   unmount /var/mqm
   rmfs /usr/mqm
   rmfs /var/mqm
   rmlv -f fslv01
   rmlv -f fslv02

5. Verify...

   # df -g
   Filesystem    GB blocks      Free %Used    Iused %Iused Mounted on
   /dev/hd4           0.56      0.37   36%    10317    11% /
   /dev/hd2           2.44      0.15   94%    47456    54% /usr
   /dev/hd9var        2.06      1.71   18%     8713     3% /var
   /dev/hd3           3.12      3.12    1%       62     1% /tmp
   /dev/hd1           3.06      3.06    1%        5     1% /home
   /dev/hd11admin     10.00      9.63    4%       31     1% /admin
   /proc                 -         -    -         -     -  /proc
   /dev/hd10opt       0.44      0.17   61%     9070    19% /opt
   /dev/fslv01        7.50      7.50    1%        4     1% /usr/mqm
   /dev/fslv02        7.50      7.50    1%        4     1% /var/mqm