Difference between revisions of "LSDF Online Storage: Snapshots"

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Snapshots can be used to quickly restore files or folders that were unintentionally deleted. Snapshots also provide a form of file versioning and the ability to revert to a previous version of a file, depending on the time interval between snapshots.
 
Snapshots can be used to quickly restore files or folders that were unintentionally deleted. Snapshots also provide a form of file versioning and the ability to revert to a previous version of a file, depending on the time interval between snapshots.
   
Snapshots for LSDF storage projects are available in the sub directory ''.snapshots'' in the base directory of you OE (e.g. ''/lsdf/kit/scc/projects/.snapshots''). Snapshots for user home directories are available in the directory ''/lsdf/kit/.snapshots''. On the [[LSDF Online Storage:LSDF_Online_Storage:_Secure_Shelllogin machines|LSDF_Online_Storage:_Secure_Shelllogin machines]] these directories are mapped with two environment variables ''$PROJECTSNAPSHOTS'' and ''$SNAPSHOTS''.
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Snapshots for LSDF storage projects are available in the sub directory ''.snapshots'' in the base directory of you OE (e.g. ''/lsdf/kit/scc/projects/.snapshots''). Snapshots for user home directories are available in the directory ''/lsdf/kit/.snapshots''. On the [[LSDF Online Storage:_Secure_Shell|login machines]] these directories are mapped with two environment variables ''$PROJECTSNAPSHOTS'' and ''$SNAPSHOTS''.
   
 
To access the snapshots of the user directories on the login machines:
 
To access the snapshots of the user directories on the login machines:

Latest revision as of 14:45, 9 August 2019

Snapshots are used to create a point-in-time copy of a file system or file sets. Snapshots can be used to quickly restore files or folders that were unintentionally deleted. Snapshots also provide a form of file versioning and the ability to revert to a previous version of a file, depending on the time interval between snapshots.

Snapshots for LSDF storage projects are available in the sub directory .snapshots in the base directory of you OE (e.g. /lsdf/kit/scc/projects/.snapshots). Snapshots for user home directories are available in the directory /lsdf/kit/.snapshots. On the login machines these directories are mapped with two environment variables $PROJECTSNAPSHOTS and $SNAPSHOTS.

To access the snapshots of the user directories on the login machines:

$ ssh loginname@os-login.lsdf.kit.edu
$ cd $SNAPSHOTS
$ ls
daily-2018.02.02-03.00.12  monthly-2017.11.30-23.00.12
daily-2018.02.03-03.00.12  monthly-2017.12.31-23.00.12
daily-2018.02.04-03.00.12  monthly-2018.01.31-23.00.12
daily-2018.02.05-03.00.12  weekly-2018.01.14-14.30.12
daily-2018.02.06-03.00.12  weekly-2018.01.21-14.30.12
daily-2018.02.07-03.00.12  weekly-2018.01.28-14.30.12
daily-2018.02.08-03.00.12  weekly-2018.02.04-14.30.12

To access the snapshots of the project directories on the login machines:

$ ssh loginname@os-login.lsdf.kit.edu
$ ls $PROJECTSNAPSHOTS
daily-2018.02.06-05.00.58 
daily-2018.02.07-05.00.58
daily-2018.02.08-05.00.58
...

Additional information can be found in the description of the LSDF file system characteristics.