Linux Home Directories

PPD Computing provides a personal home directory for users of the Linux systems whichwill be available from the interactive servers, the cluster worker nodes, and our standard configuration Linux desktops. This directory is intended for low volume personal data. If you have large amounts of data, software, etc, it should not be stored in your home directory. Instead it should be stored in a more appropriate location like your experiment's dCache space.

File Space Quotas

Quotas are in force for space usage. The default is 100MB, but if you need more, contact us and we will increase this for you -- although if the request is very high we may need to discuss with you what your storage needs are, because your home directory might not be the best place for your data!

Use quota -v to see your current quota and usage.

Backups

Home directories are mirrored to another fileserver on a daily basis in case of failure, and backed up to tape one a weekly basis.

NOTE: if you are using more space than your agreed quota (this would generally be because your space used increased while we were not implementing quotas), your home directory may be excluded from the tape backups as we do not have enough resources to handlelarge backups. If in doubt, please contact the PPD IT Helpdesk.

File Space Quotas

Quotas are in force for space usage. The default is 100MB, but if you need more, contact us and we will increase this for you -- although if the request is very high we may need to discuss with you what your storage needs are, because your home directory might not be the best place for your data!

Backups

Home directories are mirrored to another fileserver on a daily basis in case of failure, and backed up to tape one a weekly basis.

NOTE: if you are using more space than your agreed quota (this would generally be because your space used increased while we were not implementing quotas), your home directory may be excluded from the tape backups as we do not have enough resources to handlelarge backups. If in doubt, please contact the PPD IT Helpdesk.

New Hardware/Transitioning

March 2011: We will soon be migrating Linux user home directories to new hardware. When we do so, quotas will be more rigidly enforced. In preparation for the transition, users with more than 10GB of data have had a 5GB (soft) limit (10GB hard) imposed. If you have more than 10GB of data stored you will need to delete or move away the excess. Contact PPD IT Helpdesk if you need help or advice with this.

-- RobHarper - 2011-03-18

Linux Home Directories

PPD Computing provides a personal home directory for users of the Linux systems whichwill be available from the interactive servers, the cluster worker nodes, and our standard configuration Linux desktops. This directory is intended for low volume personal data. If you have large amounts of data, software, etc, it should not be stored in your home directory. Instead it should be stored in a more appropriate location like your experiment's dCache space.

File Space Quotas

Quotas are in force for space usage. The default is 100MB, but if you need more, contact us and we will increase this for you -- although if the request is very high we may need to discuss with you what your storage needs are, because your home directory might not be the best place for your data!

Backups

Home directories are mirrored to another fileserver on a daily basis in case of failure, and backed up to tape one a weekly basis.

NOTE: if you are using more space than your agreed quota (this would generally be because your space used increased while we were not implementing quotas), your home directory may be excluded from the tape backups as we do not have enough resources to handlelarge backups. If in doubt, please contact the PPD IT Helpdesk.

New Hardware/Transitioning

March 2011: We will soon be migrating Linux user home directories to new hardware. When we do so, quotas will be more rigidly enforced. In preparation for the transition, users with more than 10GB of data have had a 5GB (soft) limit (10GB hard) imposed. If you have more than 10GB of data stored you will need to delete or move away the excess. Contact PPD IT Helpdesk if you need help or advice with this.

-- RobHarper - 2011-03-18