* Vladimir Davydov <vdavydov.dev@xxxxxxxxx> [18/07/20 20:45]:
In the scope of #2129, we need to store deferred DELETE statements
generated during primary index compaction in the WAL so that we can
recover them after restart. This patch set introduces a new engine for
this purpose - blackhole. Spaces that use this engine may be written to,
but not read from (they don't even support creation of indexes). All
operations done on a blackhole space are logged in the WAL and hence
replayed during recovery, which is just what we need.
https://github.com/tarantool/tarantool/issues/2129
https://github.com/tarantool/tarantool/commits/dv/blackhole