5ba5aec1f8
As requested in #22104, moved the files and fixed other includes and build system. Moved files: - combine.hh - collection_mutation.hh - collection_mutation.cc - converting_mutation_partition_applier.hh - converting_mutation_partition_applier.cc - counters.hh - counters.cc - timestamp.hh Fixes: #22104 This is a cleanup, no need to backport Closes scylladb/scylladb#25085
78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
/*
|
|
* Copyright (C) 2018-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.0
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "gc_clock.hh"
|
|
#include "mutation/timestamp.hh"
|
|
#include "utils/extremum_tracking.hh"
|
|
|
|
// Stores statistics on all the updates done to a memtable
|
|
// The collected statistics are used for flushing memtable to the disk
|
|
struct encoding_stats {
|
|
|
|
// The fixed epoch corresponds to the one used by Origin - 22/09/2015, 00:00:00, GMT-0:
|
|
// Calendar c = Calendar.getInstance(TimeZone.getTimeZone("GMT-0"), Locale.US);
|
|
// c.set(Calendar.YEAR, 2015);
|
|
// c.set(Calendar.MONTH, Calendar.SEPTEMBER);
|
|
// c.set(Calendar.DAY_OF_MONTH, 22);
|
|
// c.set(Calendar.HOUR_OF_DAY, 0);
|
|
// c.set(Calendar.MINUTE, 0);
|
|
// c.set(Calendar.SECOND, 0);
|
|
// c.set(Calendar.MILLISECOND, 0);
|
|
//
|
|
// long TIMESTAMP_EPOCH = c.getTimeInMillis() * 1000; // timestamps should be in microseconds by convention
|
|
// int DELETION_TIME_EPOCH = (int)(c.getTimeInMillis() / 1000); // local deletion times are in seconds
|
|
// Encoding stats are used for delta-encoding, so we want some default values
|
|
// that are just good enough so we take some recent date in the past
|
|
static constexpr int32_t deletion_time_epoch = 1442880000;
|
|
static constexpr api::timestamp_type timestamp_epoch = api::timestamp_type(deletion_time_epoch) * 1000 * 1000;
|
|
static constexpr int32_t ttl_epoch = 0;
|
|
|
|
api::timestamp_type min_timestamp = timestamp_epoch;
|
|
gc_clock::time_point min_local_deletion_time = gc_clock::time_point(gc_clock::duration(deletion_time_epoch));
|
|
gc_clock::duration min_ttl = gc_clock::duration(ttl_epoch);
|
|
};
|
|
|
|
class encoding_stats_collector {
|
|
private:
|
|
min_tracker<api::timestamp_type> min_timestamp;
|
|
min_tracker<gc_clock::time_point> min_local_deletion_time;
|
|
min_tracker<gc_clock::duration> min_ttl;
|
|
|
|
protected:
|
|
void update_timestamp(api::timestamp_type ts) noexcept {
|
|
min_timestamp.update(ts);
|
|
}
|
|
|
|
void update_local_deletion_time(gc_clock::time_point local_deletion_time) noexcept {
|
|
min_local_deletion_time.update(local_deletion_time);
|
|
}
|
|
|
|
void update_ttl(gc_clock::duration ttl) noexcept {
|
|
min_ttl.update(ttl);
|
|
}
|
|
|
|
public:
|
|
encoding_stats_collector() noexcept
|
|
: min_timestamp(api::max_timestamp)
|
|
, min_local_deletion_time(gc_clock::time_point::max())
|
|
, min_ttl(gc_clock::duration::max())
|
|
{}
|
|
|
|
void update(const encoding_stats& other) noexcept {
|
|
update_timestamp(other.min_timestamp);
|
|
update_local_deletion_time(other.min_local_deletion_time);
|
|
update_ttl(other.min_ttl);
|
|
}
|
|
|
|
encoding_stats get() const noexcept {
|
|
return { min_timestamp.get(), min_local_deletion_time.get(), min_ttl.get() };
|
|
}
|
|
};
|