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Merge pull request #34486 from bigo-sg/keeperVersion

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Keeper: add version to SnapshotableHashTable
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alesapin 2022-02-23 13:35:49 +03:00 committed by GitHub
commit fd95d7a498
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4 changed files with 35 additions and 27 deletions
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10
src/Coordination/KeeperSnapshotManager.cpp
View File

@ -337,8 +337,9 @@ KeeperStorageSnapshot::KeeperStorageSnapshot(KeeperStorage * storage_, uint64_t
, session_id(storage->session_id_counter)
, cluster_config(cluster_config_)
{
snapshot_container_size = storage->container.snapshotSize();
storage->enableSnapshotMode(snapshot_container_size);
auto [size, ver] = storage->container.snapshotSizeWithVersion();
snapshot_container_size = size;
storage->enableSnapshotMode(ver);
begin = storage->getSnapshotIteratorBegin();
session_and_timeout = storage->getActiveSessions();
acl_map = storage->acl_map.getMapping();
@ -351,8 +352,9 @@ KeeperStorageSnapshot::KeeperStorageSnapshot(KeeperStorage * storage_, const Sna
, session_id(storage->session_id_counter)
, cluster_config(cluster_config_)
{
snapshot_container_size = storage->container.snapshotSize();
storage->enableSnapshotMode(snapshot_container_size);
auto [size, ver] = storage->container.snapshotSizeWithVersion();
snapshot_container_size = size;
storage->enableSnapshotMode(ver);
begin = storage->getSnapshotIteratorBegin();
session_and_timeout = storage->getActiveSessions();
acl_map = storage->acl_map.getMapping();

5
src/Coordination/KeeperStorage.h
View File

@ -161,9 +161,10 @@ public:
/// Set of methods for creating snapshots
/// Turn on snapshot mode, so data inside Container is not deleted, but replaced with new version.
void enableSnapshotMode(size_t up_to_size)
void enableSnapshotMode(size_t up_to_version)
{
container.enableSnapshotMode(up_to_size);
container.enableSnapshotMode(up_to_version);
}
/// Turn off snapshot mode.

34
src/Coordination/SnapshotableHashTable.h
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@ -17,6 +17,8 @@ struct ListNode
StringRef key;
V value;
/// Monotonically increasing version info for snapshot
size_t version{0};
bool active_in_map{true};
bool free_key{false};
};
@ -35,7 +37,8 @@ private:
IndexMap map;
bool snapshot_mode{false};
/// Allows to avoid additional copies in updateValue function
size_t snapshot_up_to_size = 0;
size_t current_version{0};
size_t snapshot_up_to_version{0};
ArenaWithFreeLists arena;
/// Collect invalid iterators to avoid traversing the whole list
std::vector<Mapped> snapshot_invalid_iters;
@ -129,8 +132,9 @@ public:
if (!it)
{
ListElem elem{copyStringInArena(arena, key), value, true};
auto itr = list.insert(list.end(), elem);
ListElem elem{copyStringInArena(arena, key), value, current_version};
auto itr = list.insert(list.end(), std::move(elem));
bool inserted;
map.emplace(itr->key, it, inserted, hash_value);
assert(inserted);
@ -151,8 +155,8 @@ public:
if (it == map.end())
{
ListElem elem{copyStringInArena(arena, key), value, true};
auto itr = list.insert(list.end(), elem);
ListElem elem{copyStringInArena(arena, key), value, current_version};
auto itr = list.insert(list.end(), std::move(elem));
bool inserted;
map.emplace(itr->key, it, inserted, hash_value);
assert(inserted);
@ -163,9 +167,9 @@ public:
auto list_itr = it->getMapped();
if (snapshot_mode)
{
ListElem elem{list_itr->key, value, true};
ListElem elem{list_itr->key, value, current_version};
list_itr->active_in_map = false;
auto new_list_itr = list.insert(list.end(), elem);
auto new_list_itr = list.insert(list.end(), std::move(elem));
it->getMapped() = new_list_itr;
snapshot_invalid_iters.push_back(list_itr);
}
@ -224,14 +228,14 @@ public:
/// We in snapshot mode but updating some node which is already more
/// fresh than snapshot distance. So it will not participate in
/// snapshot and we don't need to copy it.
size_t distance = std::distance(list.begin(), list_itr);
if (distance < snapshot_up_to_size)
if (snapshot_mode && list_itr->version <= snapshot_up_to_version)
{
auto elem_copy = *(list_itr);
list_itr->active_in_map = false;
snapshot_invalid_iters.push_back(list_itr);
updater(elem_copy.value);
auto itr = list.insert(list.end(), elem_copy);
elem_copy.version = current_version;
auto itr = list.insert(list.end(), std::move(elem_copy));
it->getMapped() = itr;
ret = itr;
}
@ -289,16 +293,16 @@ public:
updateDataSize(CLEAR, 0, 0, 0);
}
void enableSnapshotMode(size_t up_to_size)
void enableSnapshotMode(size_t version)
{
snapshot_mode = true;
snapshot_up_to_size = up_to_size;
snapshot_up_to_version = version;
++current_version;
}
void disableSnapshotMode()
{
snapshot_mode = false;
snapshot_up_to_size = 0;
}
size_t size() const
@ -306,9 +310,9 @@ public:
return map.size();
}
size_t snapshotSize() const
std::pair<size_t, size_t> snapshotSizeWithVersion() const
{
return list.size();
return std::make_pair(list.size(), current_version);
}
uint64_t getApproximateDataSize() const

13
src/Coordination/tests/gtest_coordination.cpp
View File

@ -867,7 +867,7 @@ TEST_P(CoordinationTest, SnapshotableHashMapTrySnapshot)
EXPECT_FALSE(map_snp.insert("/hello", 145).second);
map_snp.updateValue("/hello", [](IntNode & value) { value = 554; });
EXPECT_EQ(map_snp.getValue("/hello"), 554);
EXPECT_EQ(map_snp.snapshotSize(), 2);
EXPECT_EQ(map_snp.snapshotSizeWithVersion().first, 2);
EXPECT_EQ(map_snp.size(), 1);
auto itr = map_snp.begin();
@ -886,7 +886,7 @@ TEST_P(CoordinationTest, SnapshotableHashMapTrySnapshot)
}
EXPECT_EQ(map_snp.getValue("/hello3"), 3);
EXPECT_EQ(map_snp.snapshotSize(), 7);
EXPECT_EQ(map_snp.snapshotSizeWithVersion().first, 7);
EXPECT_EQ(map_snp.size(), 6);
itr = std::next(map_snp.begin(), 2);
for (size_t i = 0; i < 5; ++i)
@ -900,7 +900,7 @@ TEST_P(CoordinationTest, SnapshotableHashMapTrySnapshot)
EXPECT_TRUE(map_snp.erase("/hello3"));
EXPECT_TRUE(map_snp.erase("/hello2"));
EXPECT_EQ(map_snp.snapshotSize(), 7);
EXPECT_EQ(map_snp.snapshotSizeWithVersion().first, 7);
EXPECT_EQ(map_snp.size(), 4);
itr = std::next(map_snp.begin(), 2);
for (size_t i = 0; i < 5; ++i)
@ -912,7 +912,7 @@ TEST_P(CoordinationTest, SnapshotableHashMapTrySnapshot)
}
map_snp.clearOutdatedNodes();
EXPECT_EQ(map_snp.snapshotSize(), 4);
EXPECT_EQ(map_snp.snapshotSizeWithVersion().first, 4);
EXPECT_EQ(map_snp.size(), 4);
itr = map_snp.begin();
EXPECT_EQ(itr->key, "/hello");
@ -1166,14 +1166,15 @@ TEST_P(CoordinationTest, TestStorageSnapshotMode)
storage.container.erase("/hello_" + std::to_string(i));
}
EXPECT_EQ(storage.container.size(), 26);
EXPECT_EQ(storage.container.snapshotSize(), 101);
EXPECT_EQ(storage.container.snapshotSizeWithVersion().first, 101);
EXPECT_EQ(storage.container.snapshotSizeWithVersion().second, 1);
auto buf = manager.serializeSnapshotToBuffer(snapshot);
manager.serializeSnapshotBufferToDisk(*buf, 50);
}
EXPECT_TRUE(fs::exists("./snapshots/snapshot_50.bin" + params.extension));
EXPECT_EQ(storage.container.size(), 26);
storage.clearGarbageAfterSnapshot();
EXPECT_EQ(storage.container.snapshotSize(), 26);
EXPECT_EQ(storage.container.snapshotSizeWithVersion().first, 26);
for (size_t i = 0; i < 50; ++i)
{
if (i % 2 != 0)