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=Quotas= | =Quotas= | ||
==RPC Quotas== | ==RPC 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 | 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 Isilon 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>data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/ | 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/username</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 | Filesystem 1K-blocks Used Available Use% Mounted on | ||
data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/ | data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/username 5138048 32 5138016 1% /nfshomes/username | ||
</pre> | </pre> | ||
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<pre> | <pre> | ||
$ quota | $ quota | ||
Disk quotas for user | Disk quotas for user username (uid 13337): | ||
Filesystem blocks quota limit grace files quota limit grace | Filesystem blocks quota limit grace files quota limit grace | ||
data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/ | data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/username | ||
24 5138024 5242880 10 10276045 10485760 | 24 5138024 5242880 10 10276045 10485760 | ||
</pre> | </pre> | ||
| Line 25: | Line 25: | ||
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 '''<tt>df</tt>''' command to inspect either the current path (no arguments given) or a given path. | 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 '''<tt>df</tt>''' command to inspect either the current path (no arguments given) or a given path. | ||
For example to show my /nfshomes/ | For example to show my /nfshomes/username home directory quota, I can just use '''<tt>df ~</tt>''' | ||
<pre> | <pre> | ||
$ df ~ | $ df ~ | ||
Filesystem | Filesystem 1K-blocks Used Available Use% Mounted on | ||
data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/ | data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/username 5138048 32 5138016 1% /nfshomes/username | ||
</pre> | </pre> | ||
=Calculating Space Usage= | =Calculating Space Usage= | ||
When you are looking to diagnose how much space you are using you often want to know how much storage the immediate directories are taking in a certain folder. The utility to do this is <code>du</code>. Since *NIX operating systems use the concept of <code>..</code> for the previous directory simple file globs like <code>.*</code> don't provide exactly what you need since in certain places like your home directories there are a lot of dot files or hidden files (eg. <code>.somename</code>). To identify all files and directories from the current directory you can use something like <code>du -hs .[^.]* *</code>. | When you are looking to diagnose how much space you are using you often want to know how much storage the immediate directories are taking in a certain folder. The utility to do this is <code>du</code>. Since *NIX operating systems use the concept of <code>..</code> for the previous directory simple file globs like <code>.*</code> don't provide exactly what you need since in certain places like your home directories there are a lot of dot files or hidden files (eg. <code>.somename</code>). To identify all files and directories from the current directory you can use something like <code>du -hs .[^.]* *</code>. | ||
Latest revision as of 17:52, 6 December 2023
Quotas
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 Isilon 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/username). 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/username 5138048 32 5138016 1% /nfshomes/username
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 do not report quotas correctly.
$ quota
Disk quotas for user username (uid 13337):
Filesystem blocks quota limit grace files quota limit grace
data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/username
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/username home directory quota, I can just use df ~
$ df ~ Filesystem 1K-blocks Used Available Use% Mounted on data.isilon.umiacs.umd.edu:/ifs/umiacs/homes/username 5138048 32 5138016 1% /nfshomes/username
Calculating Space Usage
When you are looking to diagnose how much space you are using you often want to know how much storage the immediate directories are taking in a certain folder. The utility to do this is du. Since *NIX operating systems use the concept of .. for the previous directory simple file globs like .* don't provide exactly what you need since in certain places like your home directories there are a lot of dot files or hidden files (eg. .somename). To identify all files and directories from the current directory you can use something like du -hs .[^.]* *.
-bash-4.2$ du -hs .[^.]* * 48K .bash_history 94M .cache 160K .compiz 3.0M .config 32K .gconf 64K .gnupg 48K .history 48K .ICEauthority 4.2M .local 29M .mozilla 224K .ssh 48K .viminfo 48K .Xauthority 48K .xsession-errors 7.2M catkin_ws 32K Desktop 32K Documents 57M Downloads 32K Music 32K perl5 32K Pictures 32K Public 32K Templates 32K Videos