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 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 canonical_mutation type can contain a large mutation, particularly
when the mutation is a result of converting a big schema. Its data
was stored in a field of type 'bytes', which is non-contiguous and
may cause a large allocation.
This is fixed by simply changing the type to 'bytes_ostream', which is
fragmented. The change is compatible because the idl type 'bytes' is compatible
with 'bytes_ostream' as a result of dcf794b, and all canonical_mutations's
methods use the field as an input stream (ser::as_input_stream), which can
be used on 'bytes_ostream' too.
Fixes#8074
Signed-off-by: Wojciech Mitros <wojciech.mitros@scylladb.com>
Closes#8075
The header sits in many other headers, but there's a handy
schema_fwd.hh that's tiny and contains needed declarations
for other headers. So replace shema.hh with schema_fwd.hh
in most of the headers (and remove completely from some).
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
Message-Id: <20200303102050.18462-1-xemul@scylladb.com>
frozen_schema will transfer schema definition across nodes with schema
mutations. Because different nodes may have different versions of
schema tables, we cannot use frozen_mutations to transfer these
because frozen_mutation can only be read using the same version of the
schema it was frozen with. To solve this problem, new from of mutation
is introduced called canonical_mutation, which can be read using any
version of the schema.
