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  1.   Short term project storage
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  4. Sharing GWS data on JASMIN

Sharing GWS data on JASMIN

 

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Sharing GWS data with other users elsewhere on JASMIN

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Introduction   How to share specific directories  

Introduction  

This article explains how a GWS Manager can organise for some directories within a GWS to be shared with other users on JASMIN.

Note: this only applies to sharing data within the managed environment of the JASMIN platform. If you need to share data with users outside JASMIN, or to users of external cloud tenancies, please consider the HTTP option.

How to share specific directories  

Sometimes it is useful to share the contents of specific directories within your GWS with other users on JASMIN (that do not have access to your GWS). This can be achieved with the following approach:

Suppose you manage the GWS /group_workspaces/jasmin/superproj and you want to share the directory /group_workspaces/jasmin/superproj/mydata with other JASMIN users.

1. Add read and execute permission for all to the top-level GWS directory. This requires root access so you might need to request that CEDA make this change for you:

chmod 775 /group_workspaces/jasmin/superproj

2. Alter the permissions of all sub-directories to remove the execute permission for all users that don’t have access to the GWS:

find /group_workspaces/jasmin/superproj -type d -exec chmod o-x {} \;

3. Add execute permission on the sub-directory you want to share:

chmod o+x /group_workspaces/jasmin/superproj/mydata

NOTE: You may need to change permissions on directories and files within the sub-directory as well. Please consult the chmod man pages (by typing man chmod) for details.

NOTE: if you have a public directory then it needs 755 access if you want it to be visible via the webserver via the gws-access.jasmin.ac.uk service. So you may wish to re-add execute permission on that directory, e.g.:

chmod o+x /group_workspaces/jasmin/superproj/public
 

Do not set open permissions on files or directories. By this we mean permissions where data are “world-writable” by anyone, for example

-rw-rw-rw- for a file, or « DON’T USE THESE!!

drwxrwxrwx for a directory. « DON’T USE THESE!!

We provide a UNIX a group corresponding to each group workspace, usually named gws_<name> which all members of that GWS belong to: this enables sharing within the group if you set permissions appropriately using that group. If you are unsure about setting permissions, please ask the helpdesk.

Last updated on 2024-10-01 as part of:  updates oct 01 for r9 env (cfbd4f95b)
On this page:
Introduction   How to share specific directories  
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