SArchive

Archival tool for scheduler job scripts and accompanying files.

Note that the version on crates.io is older and only supports Slurm and archival to files. The reason is that we rely on several 3rd party crates that need to be published before we can publish a new version.

Minimum supported rustc

1.36

This version is what we test against in CI. We also test on

• stable
• beta
• nightly

for both Linux and MacOS.

If you do not have Rust, please see Rustup for installation instructions.

Usage

sarchive requires that the paths to the scheduler's main spool directory is specified.

sarchive supports multiple schedulers, the one to use should also be specified on the command line. Right now, there is support for Slurm and Torque.

Furthermore, sarchive offers various backends. The basic backend writes a copy of the job scripts and associated files to a directory on a mounted filesystem. We also have limited support for sending job information to Elasticsearch or produce to a Kafka topic. We briefly discuss these backends below.

File archival

For file archival, sarchive requires the path to the archive's top directory.

The archive can be further divided into subdirectories per

• year: YYYY, by provinding --period=yearly
• month: YYYYMM, by providing --period=monthly
• day: YYYYMMDD, by providing --period=daily This allows for easily tarring old(er) directories you still wish to keep around, but probably no longer immediately need for user support. Each of these directories are also created upon file archival if they do not exist.

For example, sarchive -s /var/spool/slurm -a /var/backups/slurm/job-archive

Elasticsearch archival

If you want to maintain the job script archive on another machine and/or make it easily searchable, the Elasticsearch backend. The shipped data structure contains a timestamp along with the job script and potentially other relevant information (at the scheduler's discretion).

We do not yet support SSL/TLS or authentication with the ES backend.

Kafka archival

Similar to ES archival, no SSL/TLS support at this moment. Data is shipped in the same manner.

Features

• Multithreaded, watching one dir per thread, so no need for hierarchical watching.
• Separate processing thread to ensure swift draining of the inotify event queues.
• Clean log rotation when SIGHUP is received.
• Experimental support for clean termination on receipt of SIGTERM or SIGINT, where job events that have already been seen are processed, to minimise potential loss when restarting the service.
• Output to a file in a hierarchical directory structure
• Output to Elasticsearch
• Output to Kafka

RPMs

We provide a build script to generate an RPM using the cargo-rpm tool. You may tailor the spec file (listed under the .rpm directory) to fit your needs. The RPM includes a unit file so sarchive can be started as a service by systemd. This file should also be changed to fit your requirements and local configuration.