spacesavers2 ¶

Background¶

spacesavers2

• crawls through the provided folder (and its subfolders),
• gathers stats for each file like size, inode, user/group information, etc.,
• calculates unique hashes for each file,
• using the information gathers determines "duplicates",
• reports "high-value" duplicates, i.e., the ones that will give back most diskspace, if deleted,and
• makes a "counts-matrix" style matrix with folders as rownames and users a columnnames with each cell representing duplicate bytes.

New improved parallel implementation of spacesavers. spacesavers is soon to be decommissioned!

Note: spacesavers2 requires python version 3.11 or later and the xxhash library. These dependencies are already installed on biowulf (as a conda env). The environment for running spacesavers2 can get set up using:

. "/data/CCBR_Pipeliner/db/PipeDB/Conda/etc/profile.d/conda.sh" && \
conda activate py311

Commands¶

spacesavers2 has the following Basic commands:

• spacesavers2_catalog
• spacesavers2_mimeo
• spacesavers2_grubbers
• spacesavers2_usurp
• spacesavers2_e2e
• spacesavers2_pdq

Use case¶

One would like to monitor the per-user digital footprint on shared data drives like /data/CCBR on biowulf. Setting the spacesavers2_e2e as a weekly cronjob will allow automation of this task. slurm_job script is also provided to work as a template for using the job scheduler on the HPC to submit (possibly, as cronjob).