Update docs

Signed-off-by: GuoRentong <rentong.guo@zilliz.com>

docs/developer_guides/developer_guides.md

@@ -354,6 +354,7 @@ type TsMsgMarshaler interface {
 type MsgStream interface {
   SetMsgMarshaler(marshal *TsMsgMarshaler, unmarshal *TsMsgMarshaler)
   Produce(*MsgPack) error
+  Broadcast(*MsgPack) error
   Consume() *MsgPack // message can be consumed exactly once
 }
 
@@ -361,23 +362,23 @@ type RepackFunc(msgs []* TsMsg, hashKeys [][]int32) map[int32] *MsgPack
 
 type PulsarMsgStream struct {
   client *pulsar.Client
-  repackFunc RepackFunc 
-  producers []*pulsar.Producer
-  consumers []*pulsar.Consumer
-  msgMarshaler *TsMsgMarshaler
-  msgUnmarshaler *TsMsgMarshaler
+  repackFunc RepackFunc
+  inputs []*pulsar.Producer
+  msgUnmarshaler []*TsMsgMarshaler
+  outputs []*pulsar.Consumer
+  msgMarshaler []*TsMsgMarshaler
 }
 
-func (ms *PulsarMsgStream) SetProducerChannels(channels []string)
-func (ms *PulsarMsgStream) SetConsumerChannels(channels []string)
-func (ms *PulsarMsgStream) SetMsgMarshaler(marshal *TsMsgMarshaler, unmarshal *TsMsgMarshaler)
+func (ms *PulsarMsgStream) AddInputTopics(topics []string, unmarshal *TsMsgMarshaler)
+func (ms *PulsarMsgStream) AddOutputTopics(topics []string, marshal *TsMsgMarshaler)
 func (ms *PulsarMsgStream) SetRepackFunc(repackFunc RepackFunc)
 func (ms *PulsarMsgStream) Produce(msgs *MsgPack) error
-func (ms *PulsarMsgStream) Consume() (*MsgPack, error) //return messages in one time tick
+func (ms *PulsarMsgStream) Broadcast(msgs *MsgPack) error
+func (ms *PulsarMsgStream) Consume() (*MsgPack, error)
 
 type PulsarTtMsgStream struct {
   client *pulsar.Client
-  msgHashFunc (*MsgPack) map[int32]*MsgPack // return a map from produceChannel idx to *MsgPack
+  repackFunc RepackFunc
   producers []*pulsar.Producer
   consumers []*pulsar.Consumer
   msgMarshaler *TsMsgMarshaler
@@ -387,12 +388,13 @@ type PulsarTtMsgStream struct {
   msgPacks []*MsgPack
 }
 
-func (ms *PulsarMsgStream) SetProducerChannels(channels []string)
-func (ms *PulsarMsgStream) SetConsumerChannels(channels []string)
-func (ms *PulsarMsgStream) SetMsgMarshaler(marshal *TsMsgMarshaler, unmarshal *TsMsgMarshaler)
-func (ms *PulsarMsgStream) SetMsgHashFunc(hashFunc *HashFunc)
-func (ms *PulsarMsgStream) Produce(msgs *MsgPack) error
-func (ms *PulsarMsgStream) Consume() *MsgPack //return messages in one time tick
+func (ms *PulsarTtMsgStream) SetProducers(channels []string)
+func (ms *PulsarTtMsgStream) SetConsumers(channels []string)
+func (ms *PulsarTtMsgStream) SetMsgMarshaler(marshal *TsMsgMarshaler, unmarshal *TsMsgMarshaler)
+func (ms *PulsarTtMsgStream) SetRepackFunc(repackFunc RepackFunc)
+func (ms *PulsarTtMsgStream) Produce(msgs *MsgPack) error
+func (ms *PulsarTtMsgStream) Broadcast(msgs *MsgPack) error
+func (ms *PulsarTtMsgStream) Consume() *MsgPack //return messages in one time tick
 ```
 
 
@@ -513,6 +515,7 @@ type KVBase interface {
   MultiSave(kvs map[string]string)
 	Remove(key string) error
   MultiRemove(keys []string)
+  MultiSaveAndRemove(saves map[string]string, removals []string)
 	Watch(key string) clientv3.WatchChan
 	WatchWithPrefix(key string) clientv3.WatchChan
 	LoadWithPrefix(key string) ( []string, []string, error)
@@ -1077,11 +1080,11 @@ Note that *tenantId*, *proxyId*, *collectionId*, *segmentId* are unique strings
 ```go
 type metaTable struct {
   kv kv.Base // client of a reliable kv service, i.e. etcd client
-  tenantId2Meta map[int64]TenantMeta // tenant id to tenant meta
-  proxyId2Meta map[int64]ProxyMeta // proxy id to proxy meta
-  collId2Meta map[int64]CollectionMeta // collection id to collection meta
-  collName2Id map[string]int64 // collection name to collection id
-  segId2Meta map[int64]SegmentMeta // segment id to segment meta
+  tenantId2Meta map[UniqueId]TenantMeta // tenant id to tenant meta
+  proxyId2Meta map[UniqueId]ProxyMeta // proxy id to proxy meta
+  collId2Meta map[UniqueId]CollectionMeta // collection id to collection meta
+  collName2Id map[string]UniqueId // collection name to collection id
+  segId2Meta map[UniqueId]SegmentMeta // segment id to segment meta
   
   tenantLock sync.RWMutex
   proxyLock sync.RWMutex
@@ -1089,24 +1092,24 @@ type metaTable struct {
 }
 
 func (meta *metaTable) AddTenant(tenant *TenantMeta) error
-func (meta *metaTable) DeleteTenant(tenantId int64) error
+func (meta *metaTable) DeleteTenant(tenantId UniqueId) error
 
 func (meta *metaTable) AddProxy(proxy *ProxyMeta) error
-func (meta *metaTable) DeleteProxy(proxyId int64) error
+func (meta *metaTable) DeleteProxy(proxyId UniqueId) error
 
 func (meta *metaTable) AddCollection(coll *CollectionMeta) error
-func (meta *metaTable) DeleteCollection(collId int64) error
-func (meta *metaTable) HasCollection(collId int64) bool
+func (meta *metaTable) DeleteCollection(collId UniqueId) error
+func (meta *metaTable) HasCollection(collId UniqueId) bool
 func (meta *metaTable) GetCollectionByName(collName string) (*CollectionMeta, error)
 
-func (meta *metaTable) AddPartition(collId int64, tag string) error
-func (meta *metaTable) HasPartition(collId int64, tag string) bool
-func (meta *metaTable) DeletePartition(collId int64, tag string) error
+func (meta *metaTable) AddPartition(collId UniqueId, tag string) error
+func (meta *metaTable) HasPartition(collId UniqueId, tag string) bool
+func (meta *metaTable) DeletePartition(collId UniqueId, tag string) error
 
 func (meta *metaTable) AddSegment(seg *SegmentMeta) error
-func (meta *metaTable) GetSegmentById(segId int64)(*SegmentMeta, error)
-func (meta *metaTable) DeleteSegment(segId int64) error
-func (meta *metaTable) CloseSegment(segId int64, closeTs Timestamp, num_rows int64) error
+func (meta *metaTable) GetSegmentById(segId UniqueId)(*SegmentMeta, error)
+func (meta *metaTable) DeleteSegment(segId UniqueId) error
+func (meta *metaTable) CloseSegment(segId UniqueId, closeTs Timestamp, num_rows int64) error
 
 func NewMetaTable(kv kv.Base) (*metaTable,error)
 ```
@@ -1115,3 +1118,84 @@ func NewMetaTable(kv kv.Base) (*metaTable,error)
 
 *  *AddSegment(seg \*SegmentMeta)* first update *CollectionMeta* by adding the segment id, then it adds a new SegmentMeta to *kv*. All the modifications are done transactionally.
 
+
+
+#### 10.5 System Time Synchronization
+
+
+
+###### 10.5.1 Time Tick Barrier
+
+* Soft Time Tick Barrier
+
+<img src="./raw_figs/soft_tt_barrier.jpeg" width=700>
+
+
+
+```go
+type softTimeTickBarrier struct {
+  peer2LastTt map[UniqueId]Timestamp
+  minTtInterval Timestamp
+  lastTt Timestamp
+  outTt chan Timestamp
+  ttStream *MsgStream
+}
+
+func (ttBarrier *softTimeTickBarrier) GetTimeTick() Timestamp
+func (ttBarrier *softTimeTickBarrier) Start() error
+
+func newSoftTimeTickBarrier(ctx context.Context, ttStream *MsgStream, peerIds []UniqueId, minTtInterval Timestamp) *softTimeTickBarrier
+```
+
+
+
+* Hard Time Tick Barrier
+
+<img src="./raw_figs/hard_tt_barrier.jpeg" width=700>
+
+```go
+type hardTimeTickBarrier struct {
+  peer2Tt map[UniqueId]List
+  outTt chan Timestamp
+  ttStream *MsgStream
+}
+
+func (ttBarrier *hardTimeTickBarrier) GetTimeTick() Timestamp
+func (ttBarrier *hardTimeTickBarrier) Start() error
+
+func newHardTimeTickBarrier(ctx context.Context, ttStream *MsgStream, peerIds []UniqueId) *softTimeTickBarrier
+```
+
+
+
+###### 10.5.1 Time Synchornization Message Producer
+
+<img src="./raw_figs/tt_msg_producer.jpeg" width=700>
+
+
+
+ ```go
+type timeSyncMsgProducer struct {
+  proxyTtBarrier *softTimeTickBarrier
+  WriteNodeTtBarrier *hardTimeTickBarrier
+  
+  insertSyncStream *MsgStream
+  deleteSyncStream *MsgStream
+  k2sSyncStream *MsgStream
+}
+
+func (syncMsgProducer* timeSyncMsgProducer) SetProxyTtStreams(proxyTt *MsgStream, proxyIds []UniqueId)
+func (syncMsgProducer* timeSyncMsgProducer) SetWriteNodeTtStreams(WriteNodeTt *MsgStream, writeNodeIds []UniqueId)
+
+func (syncMsgProducer* timeSyncMsgProducer) SetInsertSyncStream(insertSync *MsgStream)
+func (syncMsgProducer* timeSyncMsgProducer) SetDeleteSyncStream(deleteSync *MsgStream)
+func (syncMsgProducer* timeSyncMsgProducer) SetK2sSyncStream(k2sSync *MsgStream)
+
+func (syncMsgProducer* timeSyncMsgProducer) Start(ctx context.Context) error
+func (syncMsgProducer* timeSyncMsgProducer) Close() error
+ ```
+
+
+
+
+

internal/proto/internal_msg.proto

@@ -31,6 +31,7 @@ enum ReqType {
 
     /* System Control */
     kTimeTick = 1200;
+    kTimeSync = 1201;
 }
 
 enum PeerRole {
@@ -193,7 +194,7 @@ message SearchResult {
 }
 
 
-message TimeSyncMsg {
+message TimeTickMsg {
     int64 peer_id = 1;
     uint64 timestamp = 2;
 }