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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "indexfusiontarget.h"
#include <cinttypes>
#include <vespa/log/log.h>
LOG_SETUP(".searchcorespi.index.indexfusiontarget");
namespace searchcorespi::index {
using search::SerialNum;
namespace {
class Fusioner : public FlushTask {
private:
IndexMaintainer &_indexMaintainer;
FlushStats &_stats;
SerialNum _serialNum;
std::shared_ptr<search::IFlushToken> _flush_token;
public:
Fusioner(IndexMaintainer &indexMaintainer, FlushStats &stats, SerialNum serialNum, std::shared_ptr<search::IFlushToken> flush_token) :
_indexMaintainer(indexMaintainer),
_stats(stats),
_serialNum(serialNum),
_flush_token(std::move(flush_token))
{}
void run() override {
vespalib::string outputFusionDir = _indexMaintainer.doFusion(_serialNum, _flush_token);
// the target must live until this task is done (handled by flush engine).
_stats.setPath(outputFusionDir);
}
SerialNum getFlushSerial() const override {
return 0u; // Zero means that no tls syncing is needed
}
};
}
IndexFusionTarget::IndexFusionTarget(IndexMaintainer &indexMaintainer)
: LeafFlushTarget("memoryindex.fusion", Type::GC, Component::INDEX),
_indexMaintainer(indexMaintainer),
_fusionStats(indexMaintainer.getFusionStats()),
_lastStats()
{
_lastStats.setPathElementsToLog(7);
LOG(debug, "New target, Num flushed: %d, Disk usage: %" PRIu64, _fusionStats.numUnfused, _fusionStats.diskUsage);
}
IndexFusionTarget::~IndexFusionTarget() = default;
IFlushTarget::MemoryGain
IndexFusionTarget::getApproxMemoryGain() const
{
return MemoryGain(0, 0);
}
IFlushTarget::DiskGain
IndexFusionTarget::getApproxDiskGain() const
{
uint64_t diskUsageBefore = _fusionStats.diskUsage;
uint64_t diskUsageGain = static_cast<uint64_t>((0.1 * (diskUsageBefore * std::max(0,static_cast<int>(_fusionStats.numUnfused - 1)))));
diskUsageGain = std::min(diskUsageGain, diskUsageBefore);
if (!_fusionStats._canRunFusion)
diskUsageGain = 0;
return DiskGain(diskUsageBefore, diskUsageBefore - diskUsageGain);
}
bool
IndexFusionTarget::needUrgentFlush() const
{
bool urgent = (_fusionStats.numUnfused > _fusionStats.maxFlushed) && (_fusionStats._canRunFusion);
LOG(debug, "Num flushed: %d Urgent: %d", _fusionStats.numUnfused, urgent);
return urgent;
}
IFlushTarget::Time
IndexFusionTarget::getLastFlushTime() const
{
return vespalib::system_clock::now();
}
IFlushTarget::SerialNum
IndexFusionTarget::getFlushedSerialNum() const
{
// Lack of fusion operation doesn't prevent transaction log
// pruning.
return _indexMaintainer.getCurrentSerialNum();
}
IFlushTarget::Task::UP
IndexFusionTarget::initFlush(SerialNum serialNum, std::shared_ptr<search::IFlushToken> flush_token)
{
return std::make_unique<Fusioner>(_indexMaintainer, _lastStats, serialNum, std::move(flush_token));
}
uint64_t
IndexFusionTarget::getApproxBytesToWriteToDisk() const
{
return _fusionStats.diskUsage;
}
}
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