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chfs increase /var limit at 512mb? chfs increase /var limit at 512mb?
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  #1 (permalink)  
Old 06-21-2007
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chfs increase /var limit at 512mb?
Is there a limit of 512Mb when doing a "chfs -a size=XXXXX /myfs" ?

I managed to increase /var to 512MB fine, no issues, then i wanted to increase /usr to 2Gb, but when i enter:

Code:
# chfs -a size=2260992 /usr                                                     
chfs: 0506-908 Cannot reduce size of file system.
What's causing this? Why can't i increase /usr?

I've pasted all the stuff i know of that might be relevant below, any other command that might be useful?

Many thanks,

Craig

Code:
lsfs
Name            Nodename   Mount Pt               VFS   Size    Options    Auto Accounting
/dev/hd4        --         /                      jfs   65536   --         yes  no 
/dev/hd1        --         /home                  jfs   65536   --         yes  no 
/dev/hd2        --         /usr                   jfs   2424832 --         yes  no 
/dev/hd9var     --         /var                   jfs   524288  --         yes  no 
/dev/hd3        --         /tmp                   jfs   131072  --         yes  no 
/proc           --         /proc                  procfs --      --         yes  no 
/dev/hd10opt    --         /opt                   jfs   131072  --         yes  no 

# df -k
Filesystem    1024-blocks      Free %Used    Iused %Iused Mounted on
/dev/hd4            32768     18172   45%     1632    10% /
/dev/hd2          1212416     32732   98%    29900    10% /usr
/dev/hd9var        262144    222416   16%      354     1% /var
/dev/hd3            65536     63424    4%       25     1% /tmp
/dev/hd1            32768     31684    4%       18     1% /home
/proc                   -         -    -         -     -  /proc
/dev/hd10opt        65536     14304   79%      981     6% /opt

# lspv                                                                          
hdisk0          0041c0da0006d691                    rootvg          active      
# lspv -l 0041c0da0006d691                                                      
pvid=0041c0da0006d691:                                                          
LV NAME               LPs   PPs   DISTRIBUTION          MOUNT POINT             
hd9var                8     8     00..00..08..00..00    /var                    
hd2                   37    37    00..00..37..00..00    /usr                    
hd4                   1     1     00..00..01..00..00    /                       
hd8                   1     1     00..00..01..00..00    N/A                     
hd6                   16    16    00..16..00..00..00    N/A                     
hd5                   1     1     01..00..00..00..00    N/A                     
hd10opt               2     2     00..00..02..00..00    /opt                    
hd1                   1     1     00..00..01..00..00    /home                   
hd3                   2     2     00..00..02..00..00    /tmp
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Old 06-21-2007
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Your /usr is already grater in size than the value you tried to set it to.

Code:
new size: 2260992 
old size: 2424832
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Old 06-21-2007
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It's allways nice to specify just how much to add. You can for example give the following command:

chfs -a size=+500M /usr.
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Old 06-21-2007
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Hi Guys, many thanks for the replies.

Reborg - I'm reading the df -k output and it's telling me there's just over 1.1Gb, why is there a difference between size reportied by lsfs and df -k - what am i missing here - besides any meaningful prior experience of aix :-) ?

Sprellarinn - Now that's cool. Thats nice and easy.

I quite like this AIX approach to LVM. It seems pretty clean and sensible (even if i'm not yet familiar with the commands to make it tick).
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Old 06-21-2007
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One is in multiples of 1024 (kb "df -k"), the number you used is in blocks of 512. As Sprellarinn said it's easier for humans to deal with MB than blocks.
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Old 06-21-2007
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That's excellent.
-c
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