store

package
v0.4.0 Latest Latest
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 Go to latest Published: Jan 10, 2022 License: Apache-2.0 Imports: 9 Imported by: 2

Documentation

Index

Constants

View Source 
const (
	EvictTryDist = 16
)

Variables

View Source 
var PhaseTrunkTime, PhaseEndWriteTime uint64 //nolint:unused

Functions

This section is empty.

Types

type CacheStore 

type CacheStore struct {
	// contains filtered or unexported fields
}

CacheStore is used in two places: 1. as the temporal cache in TrunkStore, and 2. as the underlying storage in MockRootStore The 'Delete' function is used in place 1, which only marks a KV pair should be later deleted in the underlying RootStore. THe 'RealDelete' function is used in place 2.

func NewCacheStore 

func NewCacheStore(size int) *CacheStore

func (*CacheStore) Close 

func (cs *CacheStore) Close()

func (*CacheStore) Delete 

func (cs *CacheStore) Delete(key []byte)

func (*CacheStore) Get 

func (cs *CacheStore) Get(key []byte) (res []byte, status types.CacheStatus)

func (*CacheStore) RealDelete 

func (cs *CacheStore) RealDelete(key []byte)

func (*CacheStore) ScanAllEntries 

func (cs *CacheStore) ScanAllEntries(fn func(k, v []byte, isDeleted bool))

func (*CacheStore) ScanAllEntriesInShard added in v0.2.0 

func (cs *CacheStore) ScanAllEntriesInShard(shardID int, fn func(k, v []byte, isDeleted bool))

func (*CacheStore) Set 

func (cs *CacheStore) Set(key, value []byte)

func (*CacheStore) Size 

func (cs *CacheStore) Size() int

type MockRootStore 

type MockRootStore struct {
	// contains filtered or unexported fields
}

MockRootStore mimics RootStore's behavior, with an in-memory CacheStore

func NewMockRootStore 

func NewMockRootStore() *MockRootStore

func (*MockRootStore) ActiveCount 

func (rs *MockRootStore) ActiveCount() int

func (*MockRootStore) BeginWrite 

func (rs *MockRootStore) BeginWrite()

func (*MockRootStore) CheckConsistency 

func (rs *MockRootStore) CheckConsistency()

func (*MockRootStore) Close 

func (rs *MockRootStore) Close()

func (*MockRootStore) Delete 

func (rs *MockRootStore) Delete(key []byte)

func (*MockRootStore) EndWrite 

func (rs *MockRootStore) EndWrite()

func (*MockRootStore) Get 

func (rs *MockRootStore) Get(key []byte) []byte

func (*MockRootStore) GetAtHeight added in v0.4.0 

func (rs *MockRootStore) GetAtHeight(key []byte, height uint64) []byte

func (*MockRootStore) GetTrunkStore 

func (rs *MockRootStore) GetTrunkStore(cacheSize int) interface{}

func (*MockRootStore) Has 

func (rs *MockRootStore) Has(key []byte) bool

func (*MockRootStore) Lock 

func (rs *MockRootStore) Lock()

func (*MockRootStore) PrepareForDeletion 

func (rs *MockRootStore) PrepareForDeletion(key []byte)

func (*MockRootStore) PrepareForUpdate 

func (rs *MockRootStore) PrepareForUpdate(key []byte)

func (*MockRootStore) RLock 

func (rs *MockRootStore) RLock()

func (*MockRootStore) RUnlock 

func (rs *MockRootStore) RUnlock()

func (*MockRootStore) Set 

func (rs *MockRootStore) Set(key, value []byte)

func (*MockRootStore) SetHeight 

func (rs *MockRootStore) SetHeight(h int64)

func (*MockRootStore) Unlock 

func (rs *MockRootStore) Unlock()

func (*MockRootStore) Update 

func (rs *MockRootStore) Update(updater func(db types.SetDeleter))

type RootStore 

type RootStore struct {
	// contains filtered or unexported fields
}

RootStore wraps a cache and a moeingads. This cache can hold written data from many blocks, and when it reaches size limit, the older data are evicted out. This cache is write-through, which means the data written to it are also written to MoeingADS. When cache misses, we can always fetch data from MoeingADS A RWMutex protects MoeingADS and cache, making sure when data are written to them, no read operation is permitted.

func NewRootStore 

func NewRootStore(mads *moeingads.MoeingADS, isCacheableKey func(k []byte) bool) *RootStore

func (*RootStore) ActiveCount 

func (root *RootStore) ActiveCount() int

func (*RootStore) BeginWrite 

func (root *RootStore) BeginWrite()

When the client code writes RootStore, it must follow 'BeginWrite -> Set&Delete -> EndWrite' sequence, or it can use the 'Update' function which ensures such a sequence.

func (*RootStore) Close 

func (root *RootStore) Close()

func (*RootStore) Delete 

func (root *RootStore) Delete(key []byte)

func (*RootStore) EndWrite 

func (root *RootStore) EndWrite()

func (*RootStore) Get 

func (root *RootStore) Get(key []byte) []byte

func (*RootStore) GetAtHeight added in v0.4.0 

func (root *RootStore) GetAtHeight(key []byte, height uint64) []byte

func (*RootStore) GetReadOnlyTrunkStore 

func (root *RootStore) GetReadOnlyTrunkStore(cacheSize int) interface{}

func (*RootStore) GetRootHash 

func (root *RootStore) GetRootHash() []byte

func (*RootStore) GetTrunkStore 

func (root *RootStore) GetTrunkStore(cacheSize int) interface{}

func (*RootStore) Lock 

func (root *RootStore) Lock()

func (*RootStore) PrepareForDeletion 

func (root *RootStore) PrepareForDeletion(key []byte)

func (*RootStore) PrepareForUpdate 

func (root *RootStore) PrepareForUpdate(key []byte)

func (*RootStore) RLock 

func (root *RootStore) RLock()

One RootStore can be used by many TrunkStores and RabbitStores. There can be only one writter and many readers. RootStore is written in TruckStore's WriteBack, which protect the writing process with the write-lock, and is read during the life time of RabbitStores. So RabbitStores acquire read-lock at creation and release read-lock when closing. Writer won't starve: https://stackoverflow.com/questions/46786900/the-implementions-of-rwmutex-lock-in-golang

func (*RootStore) RUnlock 

func (root *RootStore) RUnlock()

func (*RootStore) Set 

func (root *RootStore) Set(key, value []byte)

func (*RootStore) SetHeight 

func (root *RootStore) SetHeight(h int64)

func (*RootStore) Unlock 

func (root *RootStore) Unlock()

func (*RootStore) Update 

func (root *RootStore) Update(updater func(db types.SetDeleter))

type TrunkStore 

type TrunkStore struct {
	// contains filtered or unexported fields
}

TrunkStore use a temporal cache to buffer the written data from successive transactions, such that the latter transactions can read the data which were written by previous transactions. When these transactions are running, isWriting is always 0. When a transaction is writting back to TrunkStore, isWriting is setting to 1. When the writting process is finished, isWritting is setting back to 0. The client code should manages the transactions to make sure their writing-back processes are performed in serial. When a TrunkStore closes after servicing all the transactions, it may write the temporal cache's content to the underlying RootStore, if isReadOnly==false. A transaction usually access a TrunkStore through a RabbitStore.

func (*TrunkStore) ActiveCount 

func (ts *TrunkStore) ActiveCount() int

func (*TrunkStore) CacheSize added in v0.2.0 

func (ts *TrunkStore) CacheSize() int

func (*TrunkStore) Close 

func (ts *TrunkStore) Close(writeBack bool)

func (*TrunkStore) Get 

func (ts *TrunkStore) Get(key []byte) []byte

func (*TrunkStore) GetAtHeight added in v0.4.0 

func (ts *TrunkStore) GetAtHeight(key []byte, height uint64) []byte

func (*TrunkStore) PrepareForDeletion 

func (ts *TrunkStore) PrepareForDeletion(key []byte)

func (*TrunkStore) PrepareForUpdate 

func (ts *TrunkStore) PrepareForUpdate(key []byte)

func (*TrunkStore) RLock 

func (ts *TrunkStore) RLock()

func (*TrunkStore) RUnlock 

func (ts *TrunkStore) RUnlock()

func (*TrunkStore) Update 

func (ts *TrunkStore) Update(updater func(db types.SetDeleter))

func (*TrunkStore) WriteBack 

func (ts *TrunkStore) WriteBack()

Source Files

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Directories

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