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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "documentbucketmover.h"
#include "i_move_operation_limiter.h"
#include "idocumentmovehandler.h"
#include "maintenancedocumentsubdb.h"
#include <vespa/searchcore/proton/documentmetastore/i_document_meta_store.h>
#include <vespa/searchcore/proton/feedoperation/moveoperation.h>
#include <vespa/searchcore/proton/bucketdb/bucket_db_owner.h>
#include <vespa/document/fieldvalue/document.h>
using document::BucketId;
using document::Document;
using document::GlobalId;
using storage::spi::Timestamp;
namespace proton::bucketdb {
using Iterator = IDocumentMetaStore::Iterator;
MoveOperation::UP
BucketMover::createMoveOperation(const MoveKey &key) {
if (_source->lidNeedsCommit(key._lid)) return {};
const RawDocumentMetaData &metaNow = _source->meta_store()->getRawMetaData(key._lid);
if (metaNow.getGid() != key._gid) return {};
if (metaNow.getTimestamp() != key._timestamp) return {};
Document::SP doc(_source->retriever()->getFullDocument(key._lid));
if (!doc || doc->getId().getGlobalId() != key._gid) {
// Failed to retrieve document, removed or changed identity
return {};
}
BucketId bucketId = _bucket.stripUnused();
return std::make_unique<MoveOperation>(bucketId, key._timestamp, std::move(doc),
DbDocumentId(_source->sub_db_id(), key._lid), _targetSubDbId);
}
void
BucketMover::moveDocument(MoveOperationUP moveOp, IDestructorCallbackSP onDone) {
_handler->handleMove(*moveOp, std::move(onDone));
}
BucketMover::MoveKey::MoveKey(uint32_t lid, const document::GlobalId &gid, Timestamp timestamp, MoveGuard guard) noexcept
: _lid(lid),
_gid(gid),
_timestamp(timestamp),
_guard(std::move(guard))
{ }
BucketMover::MoveKey::~MoveKey() = default;
BucketMover::MoveKeys::~MoveKeys() = default;
std::shared_ptr<BucketMover>
BucketMover::MoveKeys::stealMover() {
return std::move(_mover);
}
BucketMover::GuardedMoveOps
BucketMover::MoveKeys::createMoveOperations() {
auto & mover = *_mover;
return mover.createMoveOperations(std::move(*this));
}
BucketMover::GuardedMoveOps::GuardedMoveOps(std::shared_ptr<BucketMover> mover) noexcept
: _mover(std::move(mover)),
_success(),
_failed()
{}
BucketMover::GuardedMoveOps::~GuardedMoveOps() = default;
BucketMover::BucketMover(const BucketId &bucket, const MaintenanceDocumentSubDB *source,
uint32_t targetSubDbId, IDocumentMoveHandler &handler) noexcept
: _source(source),
_handler(&handler),
_bucket(bucket),
_targetSubDbId(targetSubDbId),
_started(0),
_completed(0),
_needReschedule(false),
_cancelled(false),
_allScheduled(false),
_lastGidValid(false),
_lastGid()
{ }
BucketMover::~BucketMover() {
assert(inSync());
}
std::pair<BucketMover::MoveKeys, bool>
BucketMover::getKeysToMove(size_t maxDocsToMove) {
std::pair<MoveKeys, bool> result(MoveKeys(shared_from_this()), false);
Iterator itr = (_lastGidValid ? _source->meta_store()->upperBound(_lastGid)
: _source->meta_store()->lowerBound(_bucket));
const Iterator end = _source->meta_store()->upperBound(_bucket);
std::vector<MoveKey> toMove;
for (size_t docsMoved(0); itr != end && docsMoved < maxDocsToMove; ++itr) {
uint32_t lid = itr.getKey().get_lid();
const RawDocumentMetaData &metaData = _source->meta_store()->getRawMetaData(lid);
if (metaData.getBucketUsedBits() == _bucket.getUsedBits()) {
result.first.keys().emplace_back(lid, metaData.getGid(), metaData.getTimestamp(), MoveGuard(*this));
++docsMoved;
}
}
result.second = (itr == end);
return result;
}
BucketMover::GuardedMoveOps
BucketMover::createMoveOperations(MoveKeys toMove) {
GuardedMoveOps moveOps(toMove.stealMover());
moveOps.success().reserve(toMove.size());
for (MoveKey &key : toMove.keys()) {
if (moveOps.failed().empty()) {
auto moveOp = createMoveOperation(key);
if (moveOp) {
moveOps.success().emplace_back(std::move(moveOp), std::move(key._guard));
} else {
moveOps.failed().push_back(std::move(key._guard));
}
} else {
moveOps.failed().push_back(std::move(key._guard));
}
}
if ( ! moveOps.failed().empty()) {
_needReschedule.store(true, std::memory_order_relaxed);
}
return moveOps;
}
void
BucketMover::moveDocuments(std::vector<GuardedMoveOp> moveOps, IDestructorCallbackSP onDone) {
for (auto & moveOp : moveOps) {
moveDocument(std::move(moveOp.first), onDone);
}
}
void
BucketMover::cancel() {
_cancelled = true;
setAllScheduled();
_needReschedule.store(true, std::memory_order_relaxed);
}
}
namespace proton {
using bucketdb::BucketMover;
using bucketdb::BucketDBOwner;
DocumentBucketMover::DocumentBucketMover(IMoveOperationLimiter &limiter, BucketDBOwner &bucketDb) noexcept
: _limiter(limiter),
_bucketDb(&bucketDb),
_impl()
{}
void
DocumentBucketMover::setupForBucket(const document::BucketId &bucket, const MaintenanceDocumentSubDB *source,
uint32_t targetSubDbId, IDocumentMoveHandler &handler)
{
_impl = BucketMover::create(bucket, source, targetSubDbId, handler);
}
bool
DocumentBucketMover::moveDocuments(size_t maxDocsToMove) {
return !_impl || moveDocuments(maxDocsToMove, _limiter);
}
bool
DocumentBucketMover::moveDocuments(size_t maxDocsToMove, IMoveOperationLimiter &limiter)
{
if (_impl->allScheduled()) {
return true;
}
auto [keys, done] = _impl->getKeysToMove(maxDocsToMove);
auto moveOps = _impl->createMoveOperations(std::move(keys));
bool allOk = moveOps.failed().empty();
if (done && allOk) {
_impl->setAllScheduled();
}
if (moveOps.success().empty()) return allOk;
_impl->updateLastValidGid(moveOps.success().back().first->getDocument()->getId().getGlobalId());
for (auto & moveOp : moveOps.success()) {
// We cache the bucket for the document we are going to move to avoid getting
// inconsistent bucket info (getBucketInfo()) while moving between ready and not-ready
// sub dbs as the bucket info is not updated atomically in this case.
_bucketDb->takeGuard()->cacheBucket(moveOp.first->getBucketId());
_impl->moveDocument(std::move(moveOp.first), limiter.beginOperation());
_bucketDb->takeGuard()->uncacheBucket();
}
return allOk;
}
std::shared_ptr<BucketMover>
BucketMover::create(const document::BucketId &bucket, const MaintenanceDocumentSubDB *source,
uint32_t targetSubDbId, IDocumentMoveHandler &handler)
{
return std::shared_ptr<BucketMover>(new BucketMover(bucket, source, targetSubDbId, handler));
}
}
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