Show aging of directories.
The main motivation of this tool is to find out, for a given set of data directories, how much of the storage capacity is still in active use. This information can be used on data processing systems, like High-Performance Computing (HPC) clusters, to motivate users to migrate their unused data to long-term storage facilities.
The file system metadata available for this analysis are the access time and the modification time of the files in the data directory. Using this metadata and given a set of ages, the percentage of accessed and modified capacity of the total can be calculated for each of these ages and directories. Doing this over time, a usage profile of the data directories can be created. Users can be shown, when their data on the system gets stale and should be migrated to a storage facility suited for long-term archival.
Show how much of your directories have been lying around unused:
```console $ stor-age 90 365 -- ~/media/pics ~/projects
Directory Total Age Accessed Percent Modified Percent /home/user/media/pics 222.9 MiB 90 715.0 kiB 0.31% 382.5 kiB 0.17% 365 7.4 MiB 3.3% 1.1 MiB 0.5% /home/user/projects 4.0 GiB 90 3.4 GiB 84.78% 2.5 GiB 62.79% 365 3.7 GiB 92.64% 2.7 GiB 66.94%
```
Note: The two dashes -- are required because you can supply both
multiple ages and mulitple directories and the command-line argument parser
needs a way to distinguish these two lists.
Iterate over a set of directories with find-like tools:
bash
find /data/ -mindepth 1 -maxdepth 1 -type d |
stor-age --format prometheus 90 365
The output is in valid Prometheus metric exposition format:
```
storagebytestotal{dir="/data/foo"} 6564000342 storagebytestotal{dir="/data/bar"} 4453853339 storagebytes_total{dir="/data/baz"} 1229901478
storagebytesaccessed{dir="/data/foo",age="90"} 5887683522 storagebytesaccessed{dir="/data/foo",age="365"} 6496950716 storagebytesaccessed{dir="/data/bar",age="90"} 3728333714 storagebytesaccessed{dir="/data/bar",age="365"} 4269130140 storagebytesaccessed{dir="/data/baz",age="90"} 1229849194 storagebytesaccessed{dir="/data/baz",age="365"} 1229896439
storagebytesmodified{dir="/data/foo",age="90"} 5607932802 storagebytesmodified{dir="/data/foo",age="365"} 6432800333 storagebytesmodified{dir="/data/bar",age="90"} 1506205504 storagebytesmodified{dir="/data/bar",age="365"} 4228829760 storagebytesmodified{dir="/data/baz",age="90"} 976617687 storagebytesmodified{dir="/data/baz",age="365"} 1162918704 ```
The following list contains the crate features to be enabled via e.g.
cargo build --feature <FEATURES>. The list contains whether or not the
feature is enabled by default and what the rationale of this feature is.
table (default)
Adds an output format, i.e. --format table, that pretty-prints the report
as a table. This is intended for interactive command-line usage. It is the
default output format if this feature is enabled.
If you only need the output formats that are useful to be included as
metrics in monitoring systems (e.g. --format prometheus), you can disable
this feature to minimize dependencies.
spectrum-scale
Adds an optional file system iteration mode specific to IBM Spectrum Scale
file systems. This iteration mode uses the mmapplypolicy command instead
of universal directory traversal (std::fs::read_dir).
This can be considerably faster, especially for large directories, because
it uses file system internals and can use extensive parallelism. See the
respective command-line options in --help output for more information.
Note: The policies used with mmapplypolicy write temporary lists of
files to plain text files. These can get quite large, scaling with the
amount of files. Depending on where these lists are kept, you will either
need large amounts of memory (tmpfs) or disk space, approximately 150
MiB per million files.
Install the stor-age AUR package:
bash
pacaur -S stor-age
bash
cargo install stor-age
bash
git clone https://github.com/idiv-biodiversity/stor-age.git
cd stor-age
cargo build --release
install -Dm755 target/release/stor-age ~/bin/stor-age