CAEDM groups

CAEDM groups are used for class assignments, clubs, research, department files, and more.

CAEDM groups can be created and used by anyone with a CAEDM account. Each group has users and resources available to be added to the group. Groups are one of the many collaboration resources made available by the college through CAEDM.

Group Users

A group needs an owner, and may have managers and members.

  • The group owner is responsible for creating and renewing the group. They are the only person who may add group managers and request additional filespace quota for the group. The group owner must be the user to request optional group resources. An owner may relinquish ownership of their group at any time. The group owner has all of the privileges of a group manager. An owner does not need to be a member, but will need to be if they need access to any of the group resources.
  • A group manager may add and remove members from the group. If the group is owned by a user who could teach coursework, then the manager can use the Autopopulate feature to add and remove users from the group. A group manager will need to also be a member if they need access to group resources. A group may have many managers. It is not necessary to add the owner as a manager.
  • Group members have access to the resources of a group. Group members may be full-access members or read-only members. Read-only members have full-access to all group resources except creating or editing files to the group filespace.

Default Group Resources

Video: CAEDM Groups

Group Filespace

By default, each group is given a generous amount of filespace to share. Files created in a group space can be edited and deleted by any full-access member. Read-only members will be able to read and copy files from this filespace. Changes made to files on a group space affect other users. Keep this in mind when deleting files that others may still be interested in.

There is a quota, or limit to the number of gigabytes, you can store on your group filespace. Group quotas do not count against personal filespace quotas.

To access group files: From Windows

  • Log off and then back on.
  • Go to J:\groups.
  • Click on the folder with your group's name.

From Linux

  • Go to $HOME/groups.
  • Click or cd into the folder with your group's name.

DO NOT DELETE THE GROUPS FOLDER!!! The groups folder is a container for all of your groups. If you delete the groups folder, your operating system may systematically delete every file in every group you are a member of. This could potentially affect many other students, faculty and staff.

Fast Space

Fast Space, as the name implies, uses high-speed, enterprise-grade hard disk drives that can handle reading and writing small, scattered chunks of data continuously for an extended period of time. While high-performance disks are significantly faster than a disk you might buy at a retail store, they don't hold nearly as much data. For this reason, the quotas are smaller.

Fast Space works best for highly-random workloads, such as group projects for classes, small data sets that are actively read and written, compiling source code, rendering models, presentations, documents, spreadsheets, small videos, images, etc.

Big Space

Big Space uses enterprise-grade disks that are much larger, and the quotas are also much larger. The downside is the disks are slower, providing roughly the same performance as a common disk you would buy at a retail store.

Big Space is best for large streaming workloads and large data sets that are referred to periodically, but not on an active, continuous basis. Examples of streaming workloads would include reviewing the results from finite element analysis, batch results, simulations, data sampled from lab equipment during an experiment, video clips of student projects or capstone projects, large image repositories, etc. Large numbers of smaller files such as office suite documents are also welcome to be stored in Big Space groups, just keep in mind that the disks are larger and slower than Fast Space. The more serialized your workload is the better.

If you decide to use big space for your group and the need arises later to reprocess or compute against that data, you can still add Scratch Space to the group and temporarily copy the relevant data sets to that high-performance Scratch Space area. Any final results from the processing can be written back to Big Space if done so in a streaming fashion, or copied from Scratch Space to Big Space when the results are complete.

Group Web Space

Every group file space is created with a www folder. Files placed in this folder are published to the web at Group web spaces are subject to group quota limits and have all of the same resources and limitations as user webspaces.

Optional Group Resources

Scratch Space

Scratch space has no quota, but is not backed up.
Scratch space allows groups to have a temporary location to store large files. Unlike the standard J Drive, or a group filespace, a scratch space does not have an enforced quota. Scratch space is however, intended as a temporary location for data. Files placed here are not backed up.

The scratch space is a pooled resource. When the community pool fills to near capacity, the oldest files in the space are deleted to clear the dead wood and allow for new, temporary storage. The space itself is many terabytes in size and typically does not cycle very often.

Important Scratch Space Facts

  • There is no quota
  • Files are not backed up
  • This is temporary storage
  • You need to wait 15 minutes for scratch space to appear after creating it

How to Create a Scratch Space

Use the CAEDM website as outlined below, to modify a group to have scratch space.

Group Printing

Group printing may be useful for departments and other groups, enabling students to print using common funds.
Group printing provides a method for any user in a CAEDM group, with group printing enabled, to charge printing costs of selected jobs to specific group print accounts. For example, a student employee could print a document for a professor in the CAEDM lab, and the professor's department account would directly cover the cost of the print job.

Enabling Group Printing

To set up this feature, you will first need an existing CAEDM group. Even if the sole purpose of the group will be to share printing costs, all of the default group resources need to be created for this group. After the CAEDM group has been created, a CAEDM employee can add the print feature to your group account. You will need to provide a journal entry from your department or research group to initiate a balance on your account. A professor or department secretary can help you with a journal entry. You will need to decide how much money you would like to pre-load onto your group print balance. Contact a CAEDM employee to have this feature enabled.

How to use Group Printing

To print using a CAEDM group account balance, print as normal and select "Charge a group account" on the CAEDM Print Driver dialog. For instance, if a student wanted to print to ctb450psa, using a group print balance, they would print to CAEDM and select "ctb450psa" + "Charge a group account".

After the job is sent to the printer, you need to release the print job. This step is necessary to authorize the use of group funds, and to select which group will pay for the desired print.

To release a print job:

  • Login into and follow the menu: Printing->Release Print Job.
  • Find the job you just sent to the group queue, and release the job.
  • If enough money is in your group account to print the job, the job will print immediately to the printer you chose.

Group Database

A group may request a MySQL database. The database must be for legitimate academic purposes related to the college. Click here for database creation instructions.

Group Management Instructions

Creating a Group

When you create a group, you become it's owner. There are some responsibilities that only an owner may be responsible for. It is possible to relinquish ownership of a group. When a group is created, it will already have all of the default resources. The owner may add optional resources later. Note that owners and managers will also need to be members if they wish to use the filespace associated with the group. Each CAEDM user is limited to the number of groups that they may create. This number depends on the circumstances of the account; faculty, staff and students may have different allowances as to the number of groups that they are authorized to create. To create a group:

  1. From the CAEDM website, select "Create a Group" from the Groups menu
  2. Follow the detailed instructions on the "Create a Group" webpage.

Deleting a Group

Deleting a group makes resources available for other users. If you are done with the resources in your group, delete it. It is good practice to make sure the members of the group are finished with shared resources before you delete the group. To delete a group:

  1. From the CAEDM website, select "Manage My Groups" from the Groups menu
  2. Click the "Delete groupname" button for the group you wish to delete.

Additional Quota

It may be possible to request more filespace to your group.

Modifying a Group

Most features of a group may be configured by group owners and managers from the Groups menu of the CAEDM website. Exceptions are adding a database to a group, and group printing.

Renewing a Group

Renewing a group will allow the group to exist for another few months to a year. The exact timeframe depends on who owns the group. For example, groups owned by faculty are not renewed as often as groups owned by undergraduate students. To renew a group:

  1. From the CAEDM website, select "Manage My Groups" from the Groups menu
  2. Click the "modify" button of the group you wish to renew.
  3. Click the "Renew this group" button

Relinquishing ownership of a Group

When an owner of a group leaves the university, groups that user owns will need to be given to another user. It is best practice to complete this process before the group owner retires or graduates, etc. Finding an owner of a group becomes more difficult once they have left the university. To give a group away:

  1. From the CAEDM website, select "Manage My Groups" from the Groups menu
  2. Click the "modify" button of the group you wish to renew.
  3. Click the "Give Group to Someone Else" button

Editing Group Members

Owners and managers may manually add and remove both full access and read-only members to a group. Members may also be Auto Populated by class section.

Allow 15 minutes for group membership changes to take effect. Newly added members must refresh their group memberships by logging out of their computer and back in. Otherwise they will get an "Access Denied" error.

To Edit Group Members:

  1. From the CAEDM website, select "Manage My Groups" from the Groups menu
  2. Click the "modify" button of the group you wish to edit membership of.
  3. Click the "Edit Members" icon in the left sidebar.
  4. Follow the detailed instructions on the Edit Group Membership webpage.
  5. Allow 15 minutes for group membership changes to take effect.
  6. If you added group members, ask them to log out of and back into their computer.

Editing Group Managers

A group owner may delegate adding and removing users from a group to group managers. This feature may be useful to delegating this responsibility to department employees or research assistants. To Edit the List of Group Managers:

  1. From the CAEDM website, select "Manage My Groups" from the Groups menu
  2. Click the "modify" button of the group you wish to edit managers of.
  3. Click the "Edit Managers" icon in the left sidebar.
  4. Follow the detailed instructions on the Edit Group Managers webpage.

Auto Populating a Group

This feature is available to users who are involved in teaching coursework. Auto Populate Courses adds and removes membership in a group based on enrollment in specified class sections. Group membership may change daily as people add and drop classes. A group may have a combination of manually added members and Auto Populated members. To use this feature:

  1. From the CAEDM website, select "Manage My Groups" from the Groups menu
  2. Click the "modify" button of the group you wish to Auto Populate.
  3. Click the 'Autopopulate" icon in the left sidebar.
  4. Follow the detailed instructions on the Auto Populate webpage.

Adding Scratch Space

Group managers or owners can use the CAEDM website to add scratch space for a particular group. After adding the scratch space, it may take up to 15 minutes for it to be created.

  1. From the CAEDM website, select "Manage My Groups" from the Groups menu
  2. Under the section, "You are the owner of the following groups" click on the button "Modify -groupname-".
  3. Scroll down and look for the option to "Create" scratch space. Select it and click the button to submit the changes for the group.
  4. Within the next 15 minutes a folder called scratch will be linked in your groups' group folder -homedir-/groups/-groupname-/scratch
  5. In this folder you can store temporary files.
  6. Be sure to save irreplaceable files elsewhere, since all files left in scratch will eventually be removed.