Quota: Difference between revisions

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File systems that support RPC quotad quotas are reported to the user by the '''<tt>quota</tt>''' command.  Home directories that are mounted from our Dell FluidFS NAS will support these kinds of quotas.
File systems that support RPC quotad quotas are reported to the user by the '''<tt>quota</tt>''' command.  Home directories that are mounted from our Dell FluidFS NAS will support these kinds of quotas.


To find out what your current quota is, first run '''<tt>df .</tt>''' to find out what file system you are currently mounted from (in this example it is  <tt>fluidfs:/rama_cfarhomes/derek</tt>). '''Please note that the Use% here is for the entire file system and not your user-specific home directory.'''
To find out what your current quota is, first run '''<tt>df .</tt>''' to find out what file system you are currently mounted from (in this example it is  <tt>data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/gabija</tt>). '''Please note that the Use% here is for the entire file system and not your user-specific home directory.'''
<pre>
<pre>
# df .
# df .
Filesystem           1K-blocks     Used Available Use% Mounted on
Filesystem                                         1K-blocks Used Available Use% Mounted on
fluidfs:/rama_cfarhomes/derek
data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/gabija  5138048    32  5138016  1% /nfshomes/gabija
                    1073741824 759351008 314390816  71% /cfarhomes/derek
</pre>
</pre>


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<pre>
<pre>
$ quota
$ quota
Disk quotas for user derek (uid 2174):  
Disk quotas for user gabija (uid 16912):
     Filesystem  blocks  quota  limit  grace  files  quota  limit  grace
     Filesystem  blocks  quota  limit  grace  files  quota  limit  grace
fluidfs:/rama_cfarhomes/derek
data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/gabija
                337560      0 10240000              0      0      0
                    24  5138024 5242880              10  10276045 10485760
</pre>
</pre>



Revision as of 21:27, 5 January 2021

RPC Quotas

File systems that support RPC quotad quotas are reported to the user by the quota command. Home directories that are mounted from our Dell FluidFS NAS will support these kinds of quotas.

To find out what your current quota is, first run df . to find out what file system you are currently mounted from (in this example it is data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/gabija). Please note that the Use% here is for the entire file system and not your user-specific home directory.

# df .
Filesystem                                          1K-blocks  Used Available Use% Mounted on
data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/gabija   5138048    32   5138016   1% /nfshomes/gabija

Then run quota and that line will list your quota information for that file system. If you see errors such as "Error while getting quota from ..." you may safely ignore these as some of our file systems such as Gluster do not report quotas correctly.

$ quota
Disk quotas for user gabija (uid 16912):
     Filesystem  blocks   quota   limit   grace   files   quota   limit   grace
data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/gabija
                     24  5138024 5242880              10  10276045 10485760

If you have hit your RPC quota and haven't realized it, you may see some strange issues. For example, you will not be able to write-out files (although 'touch' and file concatenation will succeed). Some applications such as vi will throw "FSync" errors. Similarly, commands such as wget will appear to succeed but your files will be zero-length.

Tree Quotas

An alternate style of quota management is done through tree quotas that show up in how much space is available in the file system by using the df command to inspect either the current path (no arguments given) or a given path.

For example to show my /nfshomes/derektest home directory quota i can just use df ~

$ df ~
Filesystem           1K-blocks      Used Available Use% Mounted on
umiacsfs02:/nfshomes/derektest
                       1024000     49984    974016   5% /nfshomes/derektest