tritondatacenter / vnodestats

Description

vnodestats is used to take statistics on a Moray database, which is part of the Joyent Manta Project.

vnodestats currently returns the total number of vnodes (including duplicates), the number of unique vnodes and the average distance between adjacent vnodes.

This data is used to show that a resharding correctly split the vnode-pnode mapping in two. We expect the average distance between adjacent vnodes to double in a simple resharding where the number of pnodes is doubled.

Usage

$ # Copy vnodestats to a postgres zone
$ manta-login postgres
$ ./vnodestats

Build todo:

• In a SmartOS zone

    go build

• To cross compile (e.g. on macOS)

    GOOS=solaris GOARCH=amd64 go build 

Connection configuration

The database connection is configured via enviroment variables.

• DB_HOST - defaults to localhost
• DB_USER - defaults to postgres
• DB_PASSWORD - defaults to postgres
• DB_DATABASE - defaults to moray