38 lines
1.4 KiB
Markdown
38 lines
1.4 KiB
Markdown
# 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.
|