==== home directory ====
  * The home directory is located at ''/home/your_login_name''
  * The home directory is a "per user" directory
  * The home dir has a maximum size of **200 Gigabyte** and a file number limit of **2 mio files**.
  * The home is excluded from backup service but has a snapshot over the **last 14 days**.\\ The snapshot data are located at ''$HOME/.snapshot''
  * The home dir is available (read & write) on all CPU-, GPU- and interactive node.

Please use Your home dir only for basic work - not for saving huge amount of data!\\
Dont go over the above limit - check Your limits frequently with ''show_user_info''.

==== scratch directory ====
  * The scratch directory is located at ''/scratch/your_login_name''
  * The scratch directory is a "per user" directory.
  * The sratch directory is only designed for temporary job data.
  * The scratch dir has a maximum size of **5 Terabyte** and a file number limit of **2 mio files**.
  * The scratch dir is NOT included in a backup!
  * The scratch dir is available (read & write) on all CPU-, GPU- and interactive node.

Please use Your scratch dir for Your data generated during job runtime and pre/post processing.\\
Dont use this scratch dir for long term storage of any data!\\
This scratch dir is designed for high [[https://en.wikipedia.org/wiki/IOPS|IOPS]] performance

==== data exchange directory ====
  * the exchange directory is located at ''/scratch/aaa_exchange/''
  * it is only designed for data exchange of different users
  * the data exchange directory is NOT included in the backup
  * the data exchange directory is not designed for long tern storage
  * all data (files & directories) will be removed **40 days after generation**

==== project (group) directory ====
  * The project directory is located at ''/groups/your_group_name''
  * The project directory is a "per group" directory
  * The project directory has a maximum size of **1 Terabyte** and a file number limit of **1 mio files**.
  * The project directory is NOT included in a backup!
  * The project directory is available \\ a) readonly on all CPU- and GPU- nodes \\ and \\ b) read/writable on Login- and interactive nodes.
  * The project directory is designed for collaboration purposes for a research group or subdepartment - not for data exchange
  * for exchange of data please use the **data exchange directory**


==== archive directory ====
  * The archive directory  is located at ''/data2/hpcuser/your_login_name''
  * The archiv directory is a "per user" directory
  * The archive dir has a default size of **100 Gigabyte** and a file number limit of **200.000 files** - please contact [[hpc@tu-ilmenau.de]] for higher limits
  * The archive dir is included in the central backup (weekly incremental)!
  * The archive dir is available (read & write) only at the **transfer nodes**!

Please use Your archive dir for saving representative data weekly or monthly.\\
We recommend to setup Your archive file as a tar or zip file together with meta data description files.\\
Please contact our data steward [[data-steward@tu-ilmenau.de|Data Steward]] to this topic.\\
You can also save code or other data at our [[https://gitlab.tu-ilmenau.de|Gitlab Service]] or in our [[https://cloud.tu-ilmenau.de|NextCloud Service]]

Please contact [[hpc@tu-ilmenau.de|hpc@tu-ilmenau.de]] for more details and questions.\\
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