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enhance:mmapchunkmanager allocates MmapChunkDescriptor itself (#42150)

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issue: https://github.com/milvus-io/milvus/issues/42157

Signed-off-by: cqy123456 <qianya.cheng@zilliz.com>
This commit is contained in:
cqy123456 2025-06-03 14:42:31 +08:00 committed by GitHub
parent 5a355d1e57
commit 727f4ec24b
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
5 changed files with 63 additions and 75 deletions
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7
internal/core/src/segcore/ChunkedSegmentSealedImpl.cpp
View File

@ -930,10 +930,8 @@ ChunkedSegmentSealedImpl::ChunkedSegmentSealedImpl(
return this->search_pk(pk, timestamp);
},
segment_id) {
mmap_descriptor_ = std::shared_ptr<storage::MmapChunkDescriptor>(
new storage::MmapChunkDescriptor({segment_id, SegmentType::Sealed}));
auto mcm = storage::MmapManager::GetInstance().GetMmapChunkManager();
mcm->Register(mmap_descriptor_);
mmap_descriptor_ = mcm->Register();
}
ChunkedSegmentSealedImpl::~ChunkedSegmentSealedImpl() {
@ -1478,7 +1476,8 @@ ChunkedSegmentSealedImpl::HasRawData(int64_t field_id) const {
SemiInlineGet(vector_indexings_.get_field_indexing(fieldID)
->indexing_->PinCells({0}));
auto vec_index = accessor->get_cell_of(0);
return vec_index->HasRawData() || get_bit(field_data_ready_bitset_, fieldID);
return vec_index->HasRawData() ||
get_bit(field_data_ready_bitset_, fieldID);
}
} else if (IsJsonDataType(field_meta.get_data_type())) {
return get_bit(field_data_ready_bitset_, fieldID);

9
internal/core/src/segcore/SegmentGrowingImpl.h
View File

@ -266,9 +266,9 @@ class SegmentGrowingImpl : public SegmentGrowing {
IndexMetaPtr indexMeta,
const SegcoreConfig& segcore_config,
int64_t segment_id)
: mmap_descriptor_(
storage::MmapChunkDescriptorPtr(new storage::MmapChunkDescriptor(
{segment_id, SegmentType::Growing}))),
: mmap_descriptor_(storage::MmapManager::GetInstance()
.GetMmapChunkManager()
->Register()),
segcore_config_(segcore_config),
schema_(std::move(schema)),
index_meta_(indexMeta),
@ -283,9 +283,6 @@ class SegmentGrowingImpl : public SegmentGrowing {
return this->search_pk(pk, timestamp);
},
segment_id) {
auto mcm = storage::MmapManager::GetInstance().GetMmapChunkManager();
mcm->Register(mmap_descriptor_);
this->CreateTextIndexes();
this->CreateJSONIndexes();
}

45
internal/core/src/storage/MmapChunkManager.cpp
View File

@ -236,38 +236,44 @@ MmapChunkManager::~MmapChunkManager() {
}
}
void
MmapChunkManager::Register(const MmapChunkDescriptorPtr descriptor) {
if (HasRegister(descriptor)) {
LOG_WARN("descriptor has exist in MmapChunkManager");
return;
}
AssertInfo(
descriptor->segment_type == SegmentType::Growing ||
descriptor->segment_type == SegmentType::Sealed,
"only register for growing or sealed segment in MmapChunkManager");
MmapChunkDescriptorPtr
MmapChunkManager::Register() {
std::unique_lock<std::shared_mutex> lck(mtx_);
blocks_table_.emplace(*descriptor.get(), std::vector<MmapBlockPtr>());
return;
auto new_descriptor = std::shared_ptr<MmapChunkDescriptor>(
new MmapChunkDescriptor(descriptor_counter_.load()),
[this](MmapChunkDescriptor* ptr) {
UnRegister(ptr->GetId());
delete ptr;
});
descriptor_counter_.fetch_add(1);
blocks_table_.emplace(new_descriptor->GetId(), std::vector<MmapBlockPtr>());
return new_descriptor;
}
void
MmapChunkManager::UnRegister(const MmapChunkDescriptorPtr descriptor) {
AssertInfo(descriptor != nullptr, "fail to unregister a nullptr.");
MmapChunkDescriptor::ID blocks_table_key = descriptor->GetId();
UnRegister(blocks_table_key);
}
void
MmapChunkManager::UnRegister(
const MmapChunkDescriptor::ID descriptor_inner_id) {
std::unique_lock<std::shared_mutex> lck(mtx_);
MmapChunkDescriptor blocks_table_key = *descriptor.get();
if (blocks_table_.find(blocks_table_key) != blocks_table_.end()) {
auto& blocks = blocks_table_[blocks_table_key];
if (blocks_table_.find(descriptor_inner_id) != blocks_table_.end()) {
auto& blocks = blocks_table_[descriptor_inner_id];
for (auto i = 0; i < blocks.size(); i++) {
blocks_handler_->Deallocate(std::move(blocks[i]));
}
blocks_table_.erase(blocks_table_key);
blocks_table_.erase(descriptor_inner_id);
}
}
bool
MmapChunkManager::HasRegister(const MmapChunkDescriptorPtr descriptor) {
std::shared_lock<std::shared_mutex> lck(mtx_);
return (blocks_table_.find(*descriptor.get()) != blocks_table_.end());
return (blocks_table_.find(descriptor->GetId()) != blocks_table_.end());
}
void*
@ -275,9 +281,9 @@ MmapChunkManager::Allocate(const MmapChunkDescriptorPtr descriptor,
const uint64_t size) {
AssertInfo(HasRegister(descriptor),
"descriptor {} has not been register.",
descriptor->segment_id);
descriptor->GetId());
std::unique_lock<std::shared_mutex> lck(mtx_);
auto blocks_table_key = *descriptor.get();
auto blocks_table_key = descriptor->GetId();
if (size < blocks_handler_->GetFixFileSize()) {
// find a place to fit in
for (auto block_id = 0;
@ -319,6 +325,7 @@ MmapChunkManager::MmapChunkManager(std::string root_path,
cm->RemoveDir(root_path);
}
cm->CreateDir(root_path);
this->descriptor_counter_.store(0);
LOG_INFO(
"Init MappChunkManager with: Path {}, MaxDiskSize {} MB, "
"FixedFileSize {} MB.",

43
internal/core/src/storage/MmapChunkManager.h
View File

@ -29,22 +29,26 @@
#include "common/type_c.h"
#include "storage/LocalChunkManagerSingleton.h"
namespace milvus::storage {
// use segment id and segment type to descripe a segment in mmap chunk manager, segment only in two type (growing or sealed) in mmap chunk manager
struct MmapChunkDescriptor {
struct DescriptorHash {
size_t
operator()(const MmapChunkDescriptor& x) const {
//SegmentType::Growing = 0x01,SegmentType::Sealed = 0x10
size_t sign = ((size_t)x.segment_type) << (sizeof(size_t) * 8 - 1);
return ((size_t)x.segment_id) | sign;
public:
using ID = uint64_t;
MmapChunkDescriptor(const MmapChunkDescriptor&) = delete;
MmapChunkDescriptor&
operator=(const MmapChunkDescriptor&) = delete;
protected:
friend class
MmapChunkManager; // only MmapChunkManager can create MmapChunkDescriptor
const size_t key_id_;
protected:
ID
GetId() const {
return key_id_;
}
};
bool
operator==(const MmapChunkDescriptor& x) const {
return segment_id == x.segment_id && segment_type == x.segment_type;
explicit MmapChunkDescriptor(size_t id) : key_id_(id) {
}
int64_t segment_id;
SegmentType segment_type;
~MmapChunkDescriptor() = default;
};
using MmapChunkDescriptorPtr = std::shared_ptr<MmapChunkDescriptor>;
@ -180,8 +184,8 @@ class MmapChunkManager {
const uint64_t disk_limit,
const uint64_t file_size);
~MmapChunkManager();
void
Register(const MmapChunkDescriptorPtr descriptor);
MmapChunkDescriptorPtr
Register();
void
UnRegister(const MmapChunkDescriptorPtr descriptor);
bool
@ -207,14 +211,17 @@ class MmapChunkManager {
}
}
private:
void
UnRegister(const MmapChunkDescriptor::ID descriptor_inner_id);
private:
mutable std::shared_mutex mtx_;
std::unordered_map<MmapChunkDescriptor,
std::vector<MmapBlockPtr>,
MmapChunkDescriptor::DescriptorHash>
std::unordered_map<MmapChunkDescriptor::ID, std::vector<MmapBlockPtr>>
blocks_table_;
std::unique_ptr<MmapBlocksHandler> blocks_handler_ = nullptr;
std::string mmap_file_prefix_;
std::atomic<uint64_t> descriptor_counter_;
};
using MmapChunkManagerPtr = std::shared_ptr<MmapChunkManager>;
} // namespace milvus::storage

28
internal/core/unittest/test_mmap_chunk_manager.cpp
View File

@ -17,29 +17,7 @@ checking register function of mmap chunk manager
TEST(MmapChunkManager, Register) {
auto mcm =
milvus::storage::MmapManager::GetInstance().GetMmapChunkManager();
auto get_descriptor =
[](int64_t seg_id,
SegmentType seg_type) -> milvus::storage::MmapChunkDescriptorPtr {
return std::shared_ptr<milvus::storage::MmapChunkDescriptor>(
new milvus::storage::MmapChunkDescriptor({seg_id, seg_type}));
};
int64_t segment_id = 0x0000456789ABCDEF;
int64_t flow_segment_id = 0x8000456789ABCDEF;
mcm->Register(get_descriptor(segment_id, SegmentType::Growing));
ASSERT_TRUE(
mcm->HasRegister(get_descriptor(segment_id, SegmentType::Growing)));
ASSERT_FALSE(
mcm->HasRegister(get_descriptor(segment_id, SegmentType::Sealed)));
mcm->Register(get_descriptor(segment_id, SegmentType::Sealed));
ASSERT_FALSE(mcm->HasRegister(
get_descriptor(flow_segment_id, SegmentType::Growing)));
ASSERT_FALSE(
mcm->HasRegister(get_descriptor(flow_segment_id, SegmentType::Sealed)));
mcm->UnRegister(get_descriptor(segment_id, SegmentType::Sealed));
ASSERT_TRUE(
mcm->HasRegister(get_descriptor(segment_id, SegmentType::Growing)));
ASSERT_FALSE(
mcm->HasRegister(get_descriptor(segment_id, SegmentType::Sealed)));
mcm->UnRegister(get_descriptor(segment_id, SegmentType::Growing));
auto segment_descriptor = mcm->Register();
ASSERT_TRUE(mcm->HasRegister(segment_descriptor));
ASSERT_NO_THROW(mcm->UnRegister(segment_descriptor));
}