Instead of lengthy blurbs, switch to single-line, machine-readable
standardized (https://spdx.dev) license identifiers. The Linux kernel
switched long ago, so there is strong precedent.
Three cases are handled: AGPL-only, Apache-only, and dual licensed.
For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0),
reasoning that our changes are extensive enough to apply our license.
The changes we applied mechanically with a script, except to
licenses/README.md.
Closes#9937
"
The first patch introduces evictable_reader_v2, and the second one
further simplifies it. We clone instead of converting because there
is at least one downstream (by way of multishard_combining_reader) use
that is not itself straightforward to convert at the moment
(multishard_mutation_query), and because evictable_reader instances
cannot be {up,down}graded (since users also access the undelying
buffers). This also means that shard_reader, reader_lifecycle_policy
and multishard_combining_reader have to be cloned.
"
* tag 'clone-evictable-reader-to-v2/v3' of https://github.com/cmm/scylla:
convert make_multishard_streaming_reader() to flat_mutation_reader_v2
convert table::make_streaming_reader() to flat_mutation_reader_v2
convert make_flat_multi_range_reader() to flat_mutation_reader_v2
view_update_generator: remove unneeded call to downgrade_to_v1()
introduce multishard_combining_reader_v2
introduce shard_reader_v2
introduce the reader_lifecycle_policy_v2 abstract base
evictable_reader_v2: further code simplifications
introduce evictable_reader_v2 & friends
distributed_loader is replica-side thing, so it belongs in the
replica module ("distributed" refers to its ability to load
sstables in their correct shards). So move it to the replica
module.
The database, keyspace, and table classes represent the replica-only
part of the objects after which they are named. Reading from a table
doesn't give you the full data, just the replica's view, and it is not
consistent since reconciliation is applied on the coordinator.
As a first step in acknowledging this, move the related files to
a replica/ subdirectory.
The code was moved in the relevant .cc file by previous patch, now
make it sit in the relevant class. One "significant" change is that
the messaging service is available by local reference already, not
by the sharded one. Other dependencies are already satisfied by the
patch that introduced the sstables_loader class.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
Just cut-n-paste the code into sstables_loader.cc. No other
changes but replace storage service logger with its own one.
For now the code stays in storage_service class, but next
patch will relocate the code into the sstables_loader one.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
