25f43faa70
The hope here is that by moving all the schema files into synapse/storage/schema, it gets a bit easier for newcomers to navigate. It certainly got easier for me to write a helpful README. There's more to do on that front, but I'll follow up with other PRs for that.
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Synapse Database Schemas
This directory contains the schema files used to build Synapse databases.
Synapse supports splitting its datastore across multiple physical databases (which can be useful for large installations), and the schema files are therefore split according to the logical database they are apply to.
At the time of writing, the following "logical" databases are supported:
state- used to store Matrix room state (more specifically,state_groups, their relationships and contents.)main- stores everything else.
Addionally, the common directory contains schema files for tables which must be
present on all physical databases.
Full schema dumps
In the full_schemas directories, only the most recently-numbered snapshot is useful
(54 at the time of writing). Older snapshots (eg, 16) are present for historical
reference only.
Building full schema dumps
If you want to recreate these schemas, they need to be made from a database that has had all background updates run.
To do so, use scripts-dev/make_full_schema.sh. This will produce new
full.sql.postgres and full.sql.sqlite files.
Ensure postgres is installed, then run:
./scripts-dev/make_full_schema.sh -p postgres_username -o output_dir/
NB at the time of writing, this script predates the split into separate state/main
databases so will require updates to handle that correctly.