mmoxi

A Rust library and collection of tools for IBM Spectrum Scale (formerly GPFS) file systems.

Motivation

The Rust library at the moment is mostly mm* -Y parsing for easier access in tooling. We did all the mm* -Y parsing and tooling in shell scripts before. You can certainly do this, but writing good tooling in bash just doesn't scale. Having a library for access to the parsed output just makes writing tools so much easier.

Notable exceptions to parsing in the library and listing in tooling are:

1. An nmon integration that groups NSDs by (fs,pool)-tuple to be shown in nmons Disk Group I/O mode:

   bash mmoxi cache nmon NMON=g nmon -s 1 -d 1024 -g '/run/mmlocal-nmon-cache'

   This gives a better view of file servers and how much I/O they do with NSD groups rather than individual NSDs or everything summed up.

2. Prometheus metrics for:

   • disk pool size
   • disk pool group I/O
   • quotas

Docs and Usage

See the docs for library documentation and mmoxi help [subcommand...] for the CLI tools.

Installation

cargo install

bash cargo install mmoxi

from source

bash git clone https://github.com/idiv-biodiversity/mmoxi.git cd mmoxi cargo build --release install -Dm755 target/release/mmoxi ~/bin/mmoxi