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#include "VolumeJBOD.h"
#include <Common/StringUtils/StringUtils.h>
#include <Common/formatReadable.h>
#include <Common/quoteString.h>
#include <Common/logger_useful.h>
namespace DB
{
namespace ErrorCodes
{
extern const int EXCESSIVE_ELEMENT_IN_CONFIG;
}
VolumeJBOD::VolumeJBOD(
String name_,
const Poco::Util::AbstractConfiguration & config,
const String & config_prefix,
DiskSelectorPtr disk_selector)
: IVolume(name_, config, config_prefix, disk_selector)
, disks_by_size(disks.begin(), disks.end())
{
Poco::Logger * logger = &Poco::Logger::get("StorageConfiguration");
auto has_max_bytes = config.has(config_prefix + ".max_data_part_size_bytes");
auto has_max_ratio = config.has(config_prefix + ".max_data_part_size_ratio");
if (has_max_bytes && has_max_ratio)
{
throw Exception(ErrorCodes::EXCESSIVE_ELEMENT_IN_CONFIG,
"Only one of 'max_data_part_size_bytes' and 'max_data_part_size_ratio' should be specified.");
}
if (has_max_bytes)
{
max_data_part_size = config.getUInt64(config_prefix + ".max_data_part_size_bytes", 0);
}
else if (has_max_ratio)
{
auto ratio = config.getDouble(config_prefix + ".max_data_part_size_ratio");
if (ratio < 0)
throw Exception(ErrorCodes::EXCESSIVE_ELEMENT_IN_CONFIG, "'max_data_part_size_ratio' have to be not less then 0.");
UInt64 sum_size = 0;
std::vector<UInt64> sizes;
for (const auto & disk : disks)
{
auto size = disk->getTotalSpace();
if (size)
sum_size += *size;
else
break;
sizes.push_back(*size);
}
if (sizes.size() == disks.size())
{
max_data_part_size = static_cast<UInt64>(sum_size * ratio / disks.size());
for (size_t i = 0; i < disks.size(); ++i)
{
if (sizes[i] < max_data_part_size)
{
LOG_WARNING(logger, "Disk {} on volume {} have not enough space ({}) for containing part the size of max_data_part_size ({})",
backQuote(disks[i]->getName()), backQuote(config_prefix), ReadableSize(sizes[i]), ReadableSize(max_data_part_size));
}
}
}
}
static constexpr UInt64 MIN_PART_SIZE = 8u * 1024u * 1024u;
if (max_data_part_size != 0 && max_data_part_size < MIN_PART_SIZE)
{
LOG_WARNING(logger, "Volume {} max_data_part_size is too low ({} < {})",
backQuote(name), ReadableSize(max_data_part_size), ReadableSize(MIN_PART_SIZE));
}
/// Default value is 'true' due to backward compatibility.
perform_ttl_move_on_insert = config.getBool(config_prefix + ".perform_ttl_move_on_insert", true);
are_merges_avoided = config.getBool(config_prefix + ".prefer_not_to_merge", false);
}
VolumeJBOD::VolumeJBOD(const VolumeJBOD & volume_jbod,
const Poco::Util::AbstractConfiguration & config,
const String & config_prefix,
DiskSelectorPtr disk_selector)
: VolumeJBOD(volume_jbod.name, config, config_prefix, disk_selector)
{
are_merges_avoided_user_override = volume_jbod.are_merges_avoided_user_override.load(std::memory_order_relaxed);
last_used = volume_jbod.last_used.load(std::memory_order_relaxed);
}
DiskPtr VolumeJBOD::getDisk(size_t /* index */) const
{
switch (load_balancing)
{
case VolumeLoadBalancing::ROUND_ROBIN:
{
size_t start_from = last_used.fetch_add(1u, std::memory_order_acq_rel);
size_t index = start_from % disks.size();
return disks[index];
}
case VolumeLoadBalancing::LEAST_USED:
{
std::lock_guard lock(mutex);
return disks_by_size.top().disk;
}
}
UNREACHABLE();
}
ReservationPtr VolumeJBOD::reserve(UInt64 bytes)
{
/// This volume can not store data which size is greater than `max_data_part_size`
/// to ensure that parts of size greater than that go to another volume(s).
if (max_data_part_size != 0 && bytes > max_data_part_size)
return {};
switch (load_balancing)
{
case VolumeLoadBalancing::ROUND_ROBIN:
{
size_t start_from = last_used.fetch_add(1u, std::memory_order_acq_rel);
size_t disks_num = disks.size();
for (size_t i = 0; i < disks_num; ++i)
{
size_t index = (start_from + i) % disks_num;
auto reservation = disks[index]->reserve(bytes);
if (reservation)
return reservation;
}
return {};
}
case VolumeLoadBalancing::LEAST_USED:
{
std::lock_guard lock(mutex);
DiskWithSize disk = disks_by_size.top();
disks_by_size.pop();
ReservationPtr reservation = disk.reserve(bytes);
disks_by_size.push(disk);
return reservation;
}
}
UNREACHABLE();
}
bool VolumeJBOD::areMergesAvoided() const
{
auto are_merges_avoided_user_override_value = are_merges_avoided_user_override.load(std::memory_order_acquire);
if (are_merges_avoided_user_override_value)
return *are_merges_avoided_user_override_value;
else
return are_merges_avoided;
}
void VolumeJBOD::setAvoidMergesUserOverride(bool avoid)
{
are_merges_avoided_user_override.store(avoid, std::memory_order_release);
}
}
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