nickva commented on a change in pull request #2666: [WIP] soft-deletion for
database
URL: https://github.com/apache/couchdb/pull/2666#discussion_r394813145
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File path: src/fabric/src/fabric2_fdb.erl
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@@ -172,7 +174,8 @@ create(#{} = Db0, Options) ->
% Eventually DbPrefix will be HCA allocated. For now
% we're just using the DbName so that debugging is easier.
DbKey = erlfdb_tuple:pack({?ALL_DBS, DbName}, LayerPrefix),
- DbPrefix = erlfdb_tuple:pack({?DBS, DbName}, LayerPrefix),
+ #{db_prefix_allocator := DBPrefixAllocator} = erlfdb_directory:root(),
+ DbPrefix = erlfdb_hca:allocate(DBPrefixAllocator, Tx),
Review comment:
We want to generate small prefixes but I we'd also want to keep the data
under the `LayerPrefix` subspace. This might become important for backups and
such or any places where we do range reads over the whole "CouchDB" instances
sharing the same FDB cluster for example.
Then it might be something like
```
AllocPrefix = erlfdb_hca:allocate(Allocator, Tx),
DbPrefix = erlfdb_tuple:pack({?DBS, AllocPrefix}, LayerPrefix)
```
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