8eb5d6ed31
A frozen schema can be quite large (in #10071 we measured 500 bytes per column, and there can be thousands of columns in extreme tables). This can cause large contiguous allocations and therefor memory stalls or even failures to allocate. Switch to bytes_ostream as the internal representation. Fortunately frozen_schema is internally implemented as bytes_ostream, so the change is minimal. Ref #10071. Test: unit (dev) Closes #10105
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/*
|
|
* Copyright 2015-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: AGPL-3.0-or-later
|
|
*/
|
|
|
|
#include "frozen_schema.hh"
|
|
#include "db/schema_tables.hh"
|
|
#include "canonical_mutation.hh"
|
|
#include "schema_mutations.hh"
|
|
#include "idl/uuid.dist.hh"
|
|
#include "idl/keys.dist.hh"
|
|
#include "idl/mutation.dist.hh"
|
|
#include "idl/frozen_schema.dist.hh"
|
|
#include "serializer_impl.hh"
|
|
#include "serialization_visitors.hh"
|
|
#include "idl/uuid.dist.impl.hh"
|
|
#include "idl/keys.dist.impl.hh"
|
|
#include "idl/mutation.dist.impl.hh"
|
|
#include "idl/frozen_schema.dist.impl.hh"
|
|
|
|
frozen_schema::frozen_schema(const schema_ptr& s)
|
|
: _data([&s] {
|
|
schema_mutations sm = db::schema_tables::make_schema_mutations(s, api::new_timestamp(), true);
|
|
bytes_ostream out;
|
|
ser::writer_of_schema<bytes_ostream> wr(out);
|
|
std::move(wr).write_version(s->version())
|
|
.write_mutations(sm)
|
|
.end_schema();
|
|
return out;
|
|
}())
|
|
{ }
|
|
|
|
schema_ptr frozen_schema::unfreeze(const db::schema_ctxt& ctxt) const {
|
|
auto in = ser::as_input_stream(_data);
|
|
auto sv = ser::deserialize(in, boost::type<ser::schema_view>());
|
|
return sv.mutations().is_view()
|
|
? db::schema_tables::create_view_from_mutations(ctxt, sv.mutations(), sv.version())
|
|
: db::schema_tables::create_table_from_mutations(ctxt, sv.mutations(), sv.version());
|
|
}
|
|
|
|
frozen_schema::frozen_schema(bytes_ostream b)
|
|
: _data(std::move(b))
|
|
{ }
|
|
|
|
const bytes_ostream& frozen_schema::representation() const
|
|
{
|
|
return _data;
|
|
}
|