✎ ICS Home Directory [Support Wiki]

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====== ICS Home Directory ======
===== Overview ======

  * The school provides an ICS home directory for every member of the ICS community.
  * The ICS home directory is, typically, automatically available on any ICS managed Windows and Linux system.
  * That ICS home directory is available to **any** computer connected to the Campus Network(even via [[network:campus:campusvpn|VPN]]).
  * Backed up twice daily


===== Ubiquitous Availability ======

Any time you login to an ICS managed Windows or [[https://swiki.ics.uci.edu/doku.php/services:supported_os|Linux computer]] you will be presented with the same home directory and files as any other managed host at ICS.   

The School of ICS provides an ICS home directory for **every** member of the ICS community, including faculty, staff, grad and ugrad students, and visitors.  That ICS Home Directory is available to **any** ICS computer, **any** computer on the UCI campus, and **any** computer connected to the [[network:campus:campusvpn|Campus VPN]].
The ICS home directory is automatically mounted on any ICS managed Linux or Windows host.  Your home directory may be [[accounts:fuse-sshfs|mounted via sshfs or Samba]] from any unmanaged host.


=== ICS Managed Linux ===

Home directories are automatically mounted on /home/<username> via [[https://en.wikipedia.org/wiki/Network_File_System|NFS]] by the [[https://en.wikipedia.org/wiki/Automounter|autofs]] service.   

=== ICS Managed Windows ===

Home directories are typically mapped as the H: drive at login time via the [[accounts:mapping_network_drive|Samba service]].

=== Unmanged/Personal Linux, Windows, Macintosh ===

Follow these instructions to mount your home directory [[accounts:fuse-sshfs|via sshfs or Samba]] from any host connected to the campus network.


==== Tardigrade:  The Updated Storage Server ====

Beginning Fall 2021, all home directories are being stored on a new [[https://www.purestorage.com/products/file-and-object/flashblade.html|Purestorage Flashblade]] named [[hardware:storage:tardigrade|tardigrade.ics.uci.edu]], occasionally abbreviated as tg.ics.uci.edu.

Highlights:

  * Backed by all flash storage so home directory access is fast 
  * Redundant 40Gb/s uplink to the ICS Data Center Backbone
  * Inline compression (data reduction factor of ~1.6)
  * [[accounts:snapshots|28 days of self service snapshots]] + long term disaster recovery backups




==== Quotas ====

The following chart lists current quota limits for home directories that are on Tardigrade.  There are no limits on the number of files a user may own.

| **Account Type**  | **Quota**  |
| Faculty | 512 GB |
| Graduate Students |384 GB |
| Staff |256 GB |
| Undergraduate Students | 256GB |
| Visitors | TBD |

=== How much space am I using? ===

Are you getting an over quota message but when running **df -h** it shows that there TBs of available space? 

<code>
# df . -h
Filesystem         Size  Used Avail Use% Mounted on
tardigrade:/ugrad   99T   13T   86T  13% /net/tardigrade/ugrad
</code>

The command is returning the size of physical filesystem. Your quota is what is listed in the table above. If you would like to know how much space you're using, please run **du -sh /home/your_username**. This command could take a few minutes depending on how much data is in your home directory.
==== Backup and Recovery====

=== Snapshots ===

Self service [[accounts:snapshots|Snapshots]] are available to all users for file recovery for the previous four weeks (28 days).

=== Long Term Backups/Disaster Recovery ===

Backups to tape are made once per month.   Our goals is to keep a quarterly copy of the each home directory on tape for two or more years.   Contact [[:start#contacting_ics_computing_support_helpdesk|ICS Computing Support Helpdesk]] if you feel  you require a file recovery that is no available via snapshots.

=== Exceptions ====

Files or directories called "scratch" and some video and audio files will be excluded from backups.