[linux-lvm] thin volume usage report

[linux-lvm] thin volume usage report

[Xen]

So I concocted another thing:

     name             pct      size
     ------------------------------
     data          38.66%    15.43g
     home           8.22%     3.28g
     sites         33.55%    13.39g
     ------------------------------ +
     total         80.43%    32.11g

     reported      80.50%    32.13g
     available     19.50%     7.78g
     ------------------------------ +
     full size    100.00%    39.91g

This script will take a thin pool as a parameter (or search for all 
existing)
and obtain all non-snapshot volumes.

It then counts the PE usage of all segments of those volumes together.
Then based on the usage % it will calculate the number of extents in 
use.

It will turn that into a percentage of the total amount of extents in 
the pool.

Then it will calculate the size in use and turn it into a human readable 
form based on the LVM xxx.xxs format meaning that megabytes are also 
displayed 123.00m with a max of 999.00m but typically you would see 
0.99g or 2.23g figures.

Goes upto exa :p.

It obtains the VG PE_size (normally 4MB) for size calculations.

The discrepancy between "total" and "reported" is not yet used but 
typically this difference would sit in snapshots...

It would become:

     name             pct      size
     ------------------------------
     data          38.66%    15.43g
     home           8.22%     3.28g
     sites         33.55%    13.39g
     ------------------------------ +
     total         80.43%    32.11g
     unaccounted    0.07%    20.00m
     ------------------------------ +
     reported      80.50%    32.13g
     available     19.50%     7.78g
     ------------------------------ +
     full size    100.00%    39.91g

Or something of the kind.

The idea for this thing is of course to be used in reports but you could 
also run it manually.

Re: [linux-lvm] thin volume usage report

[Xen]

Xen schreef op 16-04-2017 11:47:

> This script will take a thin pool as a parameter (or search for all 
> existing)
> and obtain all non-snapshot volumes.

Currently though it will paste the reports together in parallel if it 
finds more than one pool :p

      name             pct      size        name             pct      
size
      ------------------------------        
------------------------------
      crazy             0%     0.00m        data          38.66%    
15.43g
      ------------------------------ +      home           8.22%     
3.28g
      total             0%     0.00m        sites         33.55%    
13.39g
                                            
------------------------------ +
      reported       0.00%     0.00m        total         80.43%    
32.11g
      available    100.00%    32.00m
      ------------------------------ +      reported      80.50%    
32.13g
      full size    100.00%    32.00m        available     19.50%     
7.78g
                                            
------------------------------ +
                                            full size    100.00%    
39.91g

I don't know how many thin pools people might have :p.

I guess I should make a number of forms available but it is so much work 
:p.

Lol.

Current version is at : 
http://www.xenhideout.nl/scripts/thin_size_report.sh.txt

Running it will crash your system and send your brain contents to NASA.

But it might also produce the above output or something similar.

It needs access to /sbin/lvs and /sbin/vgdisplay but I guess there is 
really only one binary.

Re: [linux-lvm] thin volume usage report

[Xen]

New format:

     name               pct       size
     ---------------------------------
     data            38.66%     15.43g
     home             3.32%      1.32g
     sites           14.47%      5.77g
     --------------------------------- +
     volumes         56.45%     22.53g
     snapshots        5.07%      2.10g
     --------------------------------- +
     used            61.52%     24.55g
     available       38.48%     15.36g
     --------------------------------- +
     pool size      100.00%     39.91g


Old format:

     name             pct      size
     ------------------------------
     data          38.66%    15.43g
     home           8.22%     3.28g
     sites         33.55%    13.39g
     ------------------------------ +
     total         80.43%    32.11g

     reported      80.50%    32.13g
     available     19.50%     7.78g
     ------------------------------ +
     full size    100.00%    39.91g