File systems

Local (JFS) filesystems

/var and /tmp should be at least 64MB (131072 512-byte blocks) in size. Paging space should be at least as large as the machine's RAM.
The /tmp filesystem should be cleaned on a daily basis, edit /var/spool/cron/crontabs/root or use

   crontab -e

to insert

   0 3 * * * /usr/sbin/skulker >/dev/null # obsolete

   0 3 * * * /opt/bin/scavenger -t+1 /tmp >/dev/null

which will cleanup at 3 AM.

/opt

This filesystem usually holds optional software, mostly freeware. It is created automatically during installation of AIX>=5.1. On earlier versions one has to create it manually on rootvg with a size of 64MB, better 128MB:

   smitty storage: Logical Volumes - Add a Logical Volume 
   smitty storage: Filesystems - Add / Change / Show / Delete File Systems
   smitty storage: Filesystems - Add / Change / Show / Delete File Systems
   smitty storage: Filesystems - Mount a File System

or per command line

   mklv -y'hd10opt' -t'jfs' rootvg 1               # 1 partition to start with
   crfs -v jfs -d'hd10opt' -m'/opt' -p'rw' -A yes  # filesystem with default parameters
   chfs -a size='262144' /opt                      # increase it to 128MB      
   mount /dev/hd10opt /opt                         # mount it

Remote filesystems, mounted via automounter

There are user, scratch and data filesystems, as well as freeware and commercial applications.

Prepare links and directories,

   rm /u     # it's only a softlink to /home 
   mkdir /u

At GSI:

			mkdir /nfs
			ln -s /nfs/clri6c/cern      /cern
			ln -s /nfs/clri6c/local.AIX /usr/local
			mkdir /bio
			ln -s /nfs/bio/local.AIX/52 /bio/local       # for AIX 5.2
			ln -s /nfs/bio/local.AIX/53 /bio/local       # for AIX 5.3
			ln -s /nfs/bio/local.AIX/61 /bio/local       # for AIX 6.1
			ln -s /nfs/bio/local.AIX/71 /bio/local       # for AIX 7.1

else:
```
   mkdir /nfs
```

Prepare the automounter files (the comments in the following should be omitted, their content belongs into the respective /etc/auto.* file)

GSI, AIX >= 5.1, new:
/etc/auto_master for example looks like

/u        /etc/auto.u       # $user     -rw,vers=3,proto=tcp biops5z:/userfs/userb01/$user (distributed by IT)
/s        /etc/auto.s       # bio       -rw,vers=3,proto=tcp biops6b:/scratch/bio
/d        /etc/auto.d       # bio       -rw,vers=3,proto=tcp biops6a:/data/data014
/nfs/clri6c /etc/auto.nfs   # (for GSI /usr/local etc)
/nfs/bio    /etc/auto.bio   # local.AIX -ro,vers=3,proto=tcp biops5z:/applfs/applb00/AIX
/-        /etc/auto.lxg0110 # 
/-        /etc/auto.lxg0113 # /datalxg0113   -rw,bg,soft,intr,retry=10   lxg0113:/data.local1

If maps have changed, stop the automounter and restart:

stopsrc -s automountd; /usr/sbin/automount -m -v -f /etc/auto_master

GSI, AIX <= 4.3, old:
/etc/auto_master for example looks like:

/u        /etc/auto.u       # $user     -rw,vers=3,proto=tcp biops5z:/userfs/userb01/$user (distributed by IT)
/s        /etc/auto.s       # bio       -rw,vers=3,proto=tcp biops6b:/scratch/bio
/d        /etc/auto.d       # bio       -rw,vers=3,proto=tcp biops6a:/data/data014
/nfs/clri6c /etc/auto.nfs   # (for GSI /usr/local etc)
/bioapps /etc/auto.bioapps  # (for WP 6, applix) 
/apps /etc/auto.apps        # (for WP 8, applix 4.42)
/-        /etc/auto.lxg0012 # /data.local  -rw,vers=3,proto=tcp   lxg0012:/data.local

To enable Biophysics commercial apps (WordPerfect, applixware, etc.) /etc/auto.bioapps must have entries like

APPLIX        -ro,vers=3,proto=tcp   biori6y:/bioapps/APPLIX

As of October 2005, /d/bio and /s/bio file systems reside on bio servers, thus ensure that /etc/auto.d and /etc/auto.s contain the lines

bio        -rw,vers=3,proto=tcp biops6a:/data/data014 
bio        -rw,vers=3,proto=tcp biops6b:/scratch/bio

else, and on AIX == 4.3:
/etc/auto_master for example looks like:

/nfs      /etc/auto.nfs  # local   -ro rs6kf:/applfs/applb01/AIX/POWER
                         # install -rw rs6kf:/applfs/applb01/AIX/POWER
/s        /etc/auto.s    # bio -rw rs6kf:/scratch/bio
/d        /etc/auto.d    # bio -rw  rs6kf:/datafs/bio
/-        /etc/auto.u    # /u  -rw rs6kf:/userfs/AIX/POWER/

If this file exists, the automount daemon will be started on boot automatically via /etc/rc.nfs.

else, and on AIX <= 4.2:
/etc/auto.master for example looks like:
```
/nfs      /etc/auto.nfs  # local   -ro,soft,bg,intr,retry=10 rs6kf:/applfs/applb01/AIX/POWER
                         # install -rw,soft,bg,intr,retry=10 rs6kf:/applfs/applb01/AIX/POWER
                         # common  -rw,soft,bgintr,retry=10 rs6kf:/applfs/applb01/COMMON
/s        /etc/auto.s    # 
/d        /etc/auto.d    # 
/-        /etc/auto.u    # 
```
Note that it might be necessary to explicitly fall back to an ancient NFS version by specifying vers=2 as mount option.
The automount daemon has to be started e.g. in /etc/rc.local:
```
/usr/sbin/automount -f /etc/auto.master
```
Alternatively, it may be placed in /etc/inittab:
```
automount:2:once:/usr/etc/automount -T -v >/dev/null 2>&1
```
Note that the automount daemon should not be terminated by kill -9, rather use kill -15 in order to allow cleanup.
Note further, that the NFS daemons (/etc/rc.nfs) have to be active in order for the automounter to work.

At GSI, for a new machine, the operating group (E.Stiel@gsi.de) has to be informed to regularly update the autofs maps on this machine.
(Obsolete as of fall 2006: it must be allowed to mount filesystems on the servers filesv1 and filesv2, M.Feyerabend@gsi.de).
clri6m

Last update: 30-Dec-2012, M.Kraemer