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stream_reader.go
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stream_reader.go
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// Copyright (c) 2014 Couchbase, Inc.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed under the
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific language governing permissions
// and limitations under the License.
package indexer
import (
"errors"
"fmt"
"sync/atomic"
"time"
"sync"
"github.com/couchbase/indexing/secondary/common"
"github.com/couchbase/indexing/secondary/dataport"
"github.com/couchbase/indexing/secondary/logging"
protobuf "github.com/couchbase/indexing/secondary/protobuf/data"
)
//MutationStreamReader reads a Dataport and stores the incoming mutations
//in mutation queue. This is the only component writing to a mutation queue.
type MutationStreamReader interface {
Shutdown()
}
type mutationStreamReader struct {
mutationCount uint64
syncBatchInterval uint64 //batch interval for sync message
stream *dataport.Server //handle to the Dataport server
streamId common.StreamId
streamMutch chan interface{} //Dataport channel
supvCmdch MsgChannel //supervisor sends commands on this channel
supvRespch MsgChannel //channel to send any message to supervisor
syncStopCh StopChannel
bucketQueueMap BucketQueueMap //indexId to mutation queue map
killch chan bool // kill chan for the main loop
stats IndexerStatsHolder
indexerState common.IndexerState
stateLock sync.RWMutex
queueMapLock sync.RWMutex
stopch StopChannel
numWorkers int // number of workers to process mutation stream
streamWorkers []*streamWorker
config common.Config
}
//CreateMutationStreamReader creates a new mutation stream and starts
//a reader to listen and process the mutations.
//In case returned MutationStreamReader is nil, Message will have the error msg.
func CreateMutationStreamReader(streamId common.StreamId, bucketQueueMap BucketQueueMap,
bucketFilter map[string]*common.TsVbuuid, supvCmdch MsgChannel, supvRespch MsgChannel,
numWorkers int, stats *IndexerStats, config common.Config, is common.IndexerState) (MutationStreamReader, Message) {
//start a new mutation stream
streamMutch := make(chan interface{}, getMutationBufferSize(config))
dpconf := config.SectionConfig(
"dataport.", true /*trim*/)
dpconf = overrideDataportConf(dpconf)
stream, err := dataport.NewServer(
string(StreamAddrMap[streamId]),
common.SystemConfig["maxVbuckets"].Int(),
dpconf, streamMutch)
if err != nil {
//return stream init error
logging.Fatalf("MutationStreamReader: Error returned from NewServer."+
"StreamId: %v, Err: %v", streamId, err)
msgErr := &MsgError{
err: Error{code: ERROR_STREAM_INIT,
severity: FATAL,
category: STREAM_READER,
cause: err}}
return nil, msgErr
}
//init the reader
r := &mutationStreamReader{streamId: streamId,
stream: stream,
streamMutch: streamMutch,
supvCmdch: supvCmdch,
supvRespch: supvRespch,
syncStopCh: make(StopChannel),
bucketQueueMap: CopyBucketQueueMap(bucketQueueMap),
killch: make(chan bool),
syncBatchInterval: getSyncBatchInterval(config),
stopch: make(StopChannel),
streamWorkers: make([]*streamWorker, numWorkers),
numWorkers: numWorkers,
config: config,
}
r.stats.Set(stats)
logging.Infof("MutationStreamReader: Setting Stream Workers %v %v", r.streamId, numWorkers)
for i := 0; i < numWorkers; i++ {
r.streamWorkers[i] = newStreamWorker(streamId, numWorkers, i, config, r, bucketFilter)
go r.streamWorkers[i].start()
}
r.indexerState = is
//start the main reader loop
go r.run()
go r.listenSupvCmd()
go r.syncWorker()
return r, &MsgSuccess{}
}
//Shutdown shuts down the mutation stream and all workers.
//This call doesn't return till shutdown is complete.
func (r *mutationStreamReader) Shutdown() {
logging.Infof("MutationStreamReader:Shutdown StreamReader %v", r.streamId)
close(r.killch)
//TODO check if the order of close is important
for i := 0; i < r.numWorkers; i++ {
close(r.streamWorkers[i].workerStopCh)
}
//stop sync worker
close(r.syncStopCh)
close(r.stopch)
//close the mutation stream
r.stream.Close()
}
//run starts the stream reader loop which listens to message from
//mutation stream
func (r *mutationStreamReader) run() {
//panic handler
defer r.panicHandler()
for {
select {
case msg, ok := <-r.streamMutch:
if ok {
switch msg.(type) {
case []*protobuf.VbKeyVersions:
vbKeyVer := msg.([]*protobuf.VbKeyVersions)
r.handleVbKeyVersions(vbKeyVer)
default:
r.handleStreamInfoMsg(msg)
}
} else {
//stream library has closed this channel indicating
//unexpected stream closure send the message to supervisor
logging.Fatalf("MutationStreamReader::run Unexpected Mutation "+
"Channel Close for Stream %v", r.streamId)
msgErr := &MsgError{
err: Error{code: ERROR_STREAM_READER_STREAM_SHUTDOWN,
severity: FATAL,
category: STREAM_READER}}
r.supvRespch <- msgErr
}
case <-r.killch:
return
}
}
}
//run starts the stream reader loop which listens to message from
//the supervisor
func (r *mutationStreamReader) listenSupvCmd() {
//panic handler
defer r.panicHandler()
for {
cmd, ok := <-r.supvCmdch
if ok {
//handle commands from supervisor
if cmd.GetMsgType() == STREAM_READER_SHUTDOWN {
//shutdown and exit the stream reader loop
r.Shutdown()
r.supvCmdch <- &MsgSuccess{}
return
}
msg := r.handleSupervisorCommands(cmd)
r.supvCmdch <- msg
} else {
//supervisor channel closed. Shutdown stream reader.
r.Shutdown()
return
}
}
}
func (r *mutationStreamReader) handleVbKeyVersions(vbKeyVers []*protobuf.VbKeyVersions) {
for _, vb := range vbKeyVers {
r.streamWorkers[int(vb.GetVbucket())%r.numWorkers].workerch <- vb
}
}
//handleStreamInfoMsg handles the error messages from Dataport
func (r *mutationStreamReader) handleStreamInfoMsg(msg interface{}) {
var supvMsg Message
switch msg.(type) {
case dataport.ConnectionError:
logging.Infof("MutationStreamReader::handleStreamInfoMsg \n\tReceived ConnectionError "+
"from Client for Stream %v %v.", r.streamId, msg.(dataport.ConnectionError))
//send a separate message for each bucket. If the ConnError is with empty vblist,
//the message is ignored.
connErr := msg.(dataport.ConnectionError)
if len(connErr) != 0 {
for bucket, vbList := range connErr {
supvMsg = &MsgStreamInfo{mType: STREAM_READER_CONN_ERROR,
streamId: r.streamId,
bucket: bucket,
vbList: copyVbList(vbList),
}
r.supvRespch <- supvMsg
}
} else {
supvMsg = &MsgStreamInfo{mType: STREAM_READER_CONN_ERROR,
streamId: r.streamId,
bucket: "",
vbList: []Vbucket(nil),
}
r.supvRespch <- supvMsg
}
default:
logging.Fatalf("MutationStreamReader::handleStreamError \n\tReceived Unknown Message "+
"from Client for Stream %v.", r.streamId)
supvMsg = &MsgError{
err: Error{code: ERROR_STREAM_READER_UNKNOWN_ERROR,
severity: FATAL,
category: STREAM_READER}}
r.supvRespch <- supvMsg
}
}
//handleSupervisorCommands handles the messages from Supervisor
func (r *mutationStreamReader) handleSupervisorCommands(cmd Message) Message {
switch cmd.GetMsgType() {
case STREAM_READER_UPDATE_QUEUE_MAP:
logging.Infof("MutationStreamReader::handleSupervisorCommands %v", cmd)
close(r.stopch)
r.queueMapLock.Lock()
defer r.queueMapLock.Unlock()
//copy and store new bucketQueueMap
req := cmd.(*MsgUpdateBucketQueue)
bucketQueueMap := req.GetBucketQueueMap()
r.bucketQueueMap = CopyBucketQueueMap(bucketQueueMap)
r.stats.Set(req.GetStatsObject())
bucketFilter := req.GetBucketFilter()
for i := 0; i < r.numWorkers; i++ {
r.streamWorkers[i].initBucketFilter(bucketFilter)
}
r.stopch = make(StopChannel)
return &MsgSuccess{}
case INDEXER_PAUSE:
logging.Infof("MutationStreamReader::handleIndexerPause")
r.setIndexerState(common.INDEXER_PAUSED)
return &MsgSuccess{}
default:
logging.Errorf("MutationStreamReader::handleSupervisorCommands Received Unknown Command %v", cmd)
return &MsgError{
err: Error{code: ERROR_STREAM_READER_UNKNOWN_COMMAND,
severity: NORMAL,
category: STREAM_READER}}
}
}
//panicHandler handles the panic from underlying stream library
func (r *mutationStreamReader) panicHandler() {
//panic recovery
if rc := recover(); rc != nil {
logging.Fatalf("MutationStreamReader::panicHandler Received Panic for Stream %v", r.streamId)
var err error
switch x := rc.(type) {
case string:
err = errors.New(x)
case error:
err = x
default:
err = errors.New("Unknown panic")
}
logging.Fatalf("StreamReader Panic Err %v", err)
logging.Fatalf("%s", logging.StackTrace())
//panic from stream library, propagate to supervisor
msg := &MsgStreamError{streamId: r.streamId,
err: Error{code: ERROR_STREAM_READER_PANIC,
severity: FATAL,
category: STREAM_READER,
cause: err}}
r.supvRespch <- msg
}
}
func (r *mutationStreamReader) syncWorker() {
ticker := time.NewTicker(time.Millisecond * time.Duration(r.syncBatchInterval))
for {
select {
case <-ticker.C:
r.maybeSendSync()
case <-r.syncStopCh:
ticker.Stop()
return
}
}
}
//send a sync message if its due
func (r *mutationStreamReader) maybeSendSync() {
hwt := make(map[string]*common.TsVbuuid)
prevSnap := make(map[string]*common.TsVbuuid)
numVbuckets := r.config["numVbuckets"].Int()
r.queueMapLock.RLock()
for bucket, _ := range r.bucketQueueMap {
hwt[bucket] = common.NewTsVbuuidCached(bucket, numVbuckets)
prevSnap[bucket] = common.NewTsVbuuidCached(bucket, numVbuckets)
}
nWrkr := r.numWorkers
for bucket, _ := range hwt {
needSync := false
for i := 0; i < nWrkr; i++ {
r.streamWorkers[i].lock.Lock()
if r.streamWorkers[i].bucketSyncDue[bucket] {
needSync = true
}
loopCnt := 0
vb := 0
for {
vb = loopCnt*nWrkr + i
if vb < numVbuckets {
hwt[bucket].Seqnos[vb] = r.streamWorkers[i].bucketFilter[bucket].Seqnos[vb]
hwt[bucket].Vbuuids[vb] = r.streamWorkers[i].bucketFilter[bucket].Vbuuids[vb]
hwt[bucket].Snapshots[vb] = r.streamWorkers[i].bucketFilter[bucket].Snapshots[vb]
prevSnap[bucket].Seqnos[vb] = r.streamWorkers[i].bucketPrevSnapMap[bucket].Seqnos[vb]
prevSnap[bucket].Vbuuids[vb] = r.streamWorkers[i].bucketPrevSnapMap[bucket].Vbuuids[vb]
prevSnap[bucket].Snapshots[vb] = r.streamWorkers[i].bucketPrevSnapMap[bucket].Snapshots[vb]
} else {
break
}
loopCnt++
}
r.streamWorkers[i].bucketSyncDue[bucket] = false
r.streamWorkers[i].lock.Unlock()
}
if needSync {
r.supvRespch <- &MsgBucketHWT{mType: STREAM_READER_HWT,
streamId: r.streamId,
bucket: bucket,
ts: hwt[bucket],
prevSnap: prevSnap[bucket]}
}
}
r.queueMapLock.RUnlock()
}
func (r *mutationStreamReader) logReaderStat() {
atomic.AddUint64(&r.mutationCount, 1)
c := atomic.LoadUint64(&r.mutationCount)
if (c%10000 == 0) || c == 1 {
logging.Infof("logReaderStat:: %v "+
"MutationCount %v", r.streamId, c)
}
}
func (r *mutationStreamReader) getIndexerState() common.IndexerState {
r.stateLock.RLock()
defer r.stateLock.RUnlock()
return r.indexerState
}
func (r *mutationStreamReader) setIndexerState(is common.IndexerState) {
r.stateLock.Lock()
defer r.stateLock.Unlock()
r.indexerState = is
}
//Stream Worker
type streamWorker struct {
workerch chan *protobuf.VbKeyVersions //buffered channel for each worker
workerStopCh StopChannel //stop channels of workers
bucketFilter map[string]*common.TsVbuuid
bucketPrevSnapMap map[string]*common.TsVbuuid
bucketSyncDue map[string]bool
lock sync.RWMutex
//local variables
skipMutation bool
evalFilter bool
snapType uint32
snapStart uint64
snapEnd uint64
workerId int
streamId common.StreamId
reader *mutationStreamReader
}
func newStreamWorker(streamId common.StreamId, numWorkers int, workerId int, config common.Config,
reader *mutationStreamReader, bucketFilter map[string]*common.TsVbuuid) *streamWorker {
w := &streamWorker{streamId: streamId,
workerId: workerId,
workerch: make(chan *protobuf.VbKeyVersions, getWorkerBufferSize(config)/uint64(numWorkers)),
workerStopCh: make(StopChannel),
bucketFilter: make(map[string]*common.TsVbuuid),
bucketPrevSnapMap: make(map[string]*common.TsVbuuid),
bucketSyncDue: make(map[string]bool),
reader: reader,
}
w.initBucketFilter(bucketFilter)
return w
}
func (w *streamWorker) start() {
defer w.reader.panicHandler()
for {
select {
case vb := <-w.workerch:
w.handleKeyVersions(vb.GetBucketname(), Vbucket(vb.GetVbucket()),
Vbuuid(vb.GetVbuuid()), vb.GetKvs())
case <-w.workerStopCh:
return
}
}
}
func (w *streamWorker) handleKeyVersions(bucket string, vbucket Vbucket, vbuuid Vbuuid,
kvs []*protobuf.KeyVersions) {
for _, kv := range kvs {
w.handleSingleKeyVersion(bucket, vbucket, vbuuid, kv)
}
}
//handleSingleKeyVersion processes a single mutation based on the command type
//A mutation is put in a worker queue and control message is sent to supervisor
func (w *streamWorker) handleSingleKeyVersion(bucket string, vbucket Vbucket, vbuuid Vbuuid,
kv *protobuf.KeyVersions) {
meta := NewMutationMeta()
meta.bucket = bucket
meta.vbucket = vbucket
meta.vbuuid = vbuuid
meta.seqno = Seqno(kv.GetSeqno())
defer meta.Free()
var mutk *MutationKeys
w.skipMutation = false
w.evalFilter = true
logging.LazyTrace(func() string {
return fmt.Sprintf("MutationStreamReader::handleSingleKeyVersion received KeyVersions %v", kv)
})
state := w.reader.getIndexerState()
for i, cmd := range kv.GetCommands() {
//based on the type of command take appropriate action
switch byte(cmd) {
//case protobuf.Command_Upsert, protobuf.Command_Deletion, protobuf.Command_UpsertDeletion:
case common.Upsert, common.Deletion, common.UpsertDeletion:
//As there can multiple keys in a KeyVersion for a mutation,
//filter needs to be evaluated and set only once.
if w.evalFilter {
w.evalFilter = false
//check the bucket filter to see if this mutation can be processed
//valid mutation will increment seqno of the filter
if !w.checkAndSetBucketFilter(meta) {
w.skipMutation = true
}
}
if w.skipMutation {
continue
}
w.reader.logReaderStat()
if state != common.INDEXER_ACTIVE {
if mutk != nil {
mutk.Free()
mutk = nil
}
continue
}
//allocate new mutation first time
if mutk == nil {
//TODO use free list here to reuse the struct and reduce garbage
mutk = NewMutationKeys()
mutk.meta = meta.Clone()
mutk.docid = kv.GetDocid()
mutk.mut = mutk.mut[:0]
}
mut := NewMutation()
mut.uuid = common.IndexInstId(kv.GetUuids()[i])
mut.key = append(mut.key, kv.GetKeys()[i]...)
mut.command = byte(kv.GetCommands()[i])
mutk.mut = append(mutk.mut, mut)
case common.DropData:
//send message to supervisor to take decision
msg := &MsgStream{mType: STREAM_READER_STREAM_DROP_DATA,
streamId: w.streamId,
meta: meta.Clone()}
w.reader.supvRespch <- msg
case common.StreamBegin:
w.updateVbuuidInFilter(meta)
//send message to supervisor to take decision
msg := &MsgStream{mType: STREAM_READER_STREAM_BEGIN,
streamId: w.streamId,
meta: meta.Clone()}
w.reader.supvRespch <- msg
case common.StreamEnd:
//send message to supervisor to take decision
msg := &MsgStream{mType: STREAM_READER_STREAM_END,
streamId: w.streamId,
meta: meta.Clone()}
w.reader.supvRespch <- msg
case common.Snapshot:
//get snapshot information from message
w.snapType, w.snapStart, w.snapEnd = kv.Snapshot()
// Snapshot marker can be processed only if
// they belong to ondisk type or inmemory type.
if w.snapType&(0x1|0x2) != 0 {
w.updateSnapInFilter(meta, w.snapStart, w.snapEnd)
}
}
}
//place secKey in the right worker's queue
if mutk != nil {
w.handleSingleMutation(mutk, w.reader.stopch)
}
}
//handleSingleMutation enqueues mutation in the mutation queue
func (w *streamWorker) handleSingleMutation(mut *MutationKeys, stopch StopChannel) {
logging.LazyTrace(func() string {
return fmt.Sprintf("MutationStreamReader::handleSingleMutation received mutation %v", mut)
})
w.reader.queueMapLock.RLock()
defer w.reader.queueMapLock.RUnlock()
//based on the index, enqueue the mutation in the right queue
if q, ok := w.reader.bucketQueueMap[mut.meta.bucket]; ok {
q.queue.Enqueue(mut, mut.meta.vbucket, stopch)
stats := w.reader.stats.Get()
if rstats, ok := stats.buckets[mut.meta.bucket]; ok {
rstats.mutationQueueSize.Add(1)
rstats.numMutationsQueued.Add(1)
}
} else {
logging.Warnf("MutationStreamReader::handleSingleMutation got mutation for "+
"unknown bucket. Skipped %v", mut)
}
}
//initBucketFilter initializes the bucket filter
func (w *streamWorker) initBucketFilter(bucketFilter map[string]*common.TsVbuuid) {
w.lock.Lock()
defer w.lock.Unlock()
//allocate a new filter for the buckets which don't
//have a filter yet
for b, q := range w.reader.bucketQueueMap {
if _, ok := w.bucketFilter[b]; !ok {
logging.Debugf("MutationStreamReader::initBucketFilter Added new filter "+
"for Bucket %v Stream %v", b, w.streamId)
//if there is non-nil filter, use that. otherwise use a zero filter.
if filter, ok := bucketFilter[b]; ok && filter != nil {
w.bucketFilter[b] = filter.Copy()
w.bucketPrevSnapMap[b] = filter.Copy()
//reset vbuuids to 0 in filter. mutations for a vbucket are
//only processed after streambegin is received, which will set
//the vbuuid again.
for i := 0; i < len(filter.Vbuuids); i++ {
w.bucketFilter[b].Vbuuids[i] = 0
}
} else {
w.bucketFilter[b] = common.NewTsVbuuid(b, int(q.queue.GetNumVbuckets()))
w.bucketPrevSnapMap[b] = common.NewTsVbuuid(b, int(q.queue.GetNumVbuckets()))
}
w.bucketSyncDue[b] = false
//reset stat for bucket
stats := w.reader.stats.Get()
if rstats, ok := stats.buckets[b]; ok {
rstats.mutationQueueSize.Set(0)
}
}
}
//remove the bucket filters for which bucket doesn't exist anymore
for b, _ := range w.bucketFilter {
if _, ok := w.reader.bucketQueueMap[b]; !ok {
logging.Debugf("MutationStreamReader::initBucketFilter Deleted filter "+
"for Bucket %v Stream %v", b, w.streamId)
delete(w.bucketFilter, b)
delete(w.bucketPrevSnapMap, b)
delete(w.bucketSyncDue, b)
}
}
}
//setBucketFilter sets the bucket filter based on seqno/vbuuid of mutation.
//filter is set when stream begin is received.
func (w *streamWorker) setBucketFilter(meta *MutationMeta) {
w.lock.Lock()
defer w.lock.Unlock()
if filter, ok := w.bucketFilter[meta.bucket]; ok {
filter.Seqnos[meta.vbucket] = uint64(meta.seqno)
filter.Vbuuids[meta.vbucket] = uint64(meta.vbuuid)
logging.Tracef("MutationStreamReader::setBucketFilter Vbucket %v "+
"Seqno %v Bucket %v Stream %v", meta.vbucket, meta.seqno, meta.bucket, w.streamId)
} else {
logging.Errorf("MutationStreamReader::setBucketFilter Missing bucket "+
"%v in Filter for Stream %v", meta.bucket, w.streamId)
}
}
//checkAndSetBucketFilter checks if mutation can be processed
//based on the current filter. Filter is also updated with new
//seqno/vbuuid if mutations can be processed.
func (w *streamWorker) checkAndSetBucketFilter(meta *MutationMeta) bool {
w.lock.Lock()
defer w.lock.Unlock()
if filter, ok := w.bucketFilter[meta.bucket]; ok {
if uint64(meta.seqno) < filter.Snapshots[meta.vbucket][0] ||
uint64(meta.seqno) > filter.Snapshots[meta.vbucket][1] {
logging.Warnf("MutationStreamReader::checkAndSetBucketFilter Out-of-bound Seqno. "+
"Snapshot %v-%v for vb %v %v %v. New seqno %v vbuuid %v. Current Seqno %v vbuuid %v",
filter.Snapshots[meta.vbucket][0], filter.Snapshots[meta.vbucket][1],
meta.vbucket, meta.bucket, w.streamId,
uint64(meta.seqno), uint64(meta.vbuuid),
filter.Seqnos[meta.vbucket], filter.Vbuuids[meta.vbucket])
}
//the filter only checks if seqno of incoming mutation is greater than
//the existing filter. Also there should be a valid StreamBegin(vbuuid)
//for the vbucket. The vbuuid check is only to ensure that after stream
//restart for a bucket, mutations get processed only after StreamBegin.
//There can be residual mutations in projector endpoint queue after
//a bucket gets deleted from stream in case of multiple buckets.
//The vbuuid doesn't get reset after StreamEnd/StreamBegin. The
//filter can be extended for that check if required.
if uint64(meta.seqno) > filter.Seqnos[meta.vbucket] &&
filter.Vbuuids[meta.vbucket] != 0 {
filter.Seqnos[meta.vbucket] = uint64(meta.seqno)
filter.Vbuuids[meta.vbucket] = uint64(meta.vbuuid)
w.bucketSyncDue[meta.bucket] = true
return true
} else {
logging.Tracef("MutationStreamReader::checkAndSetBucketFilter Skipped "+
"Mutation %v for Bucket %v Stream %v. Current Filter %v", meta,
meta.bucket, w.streamId, filter.Seqnos[meta.vbucket])
return false
}
} else {
logging.Debugf("MutationStreamReader::checkAndSetBucketFilter Missing"+
"bucket %v in Filter for Stream %v", meta.bucket, w.streamId)
return false
}
}
//updates snapshot information in bucket filter
func (w *streamWorker) updateSnapInFilter(meta *MutationMeta,
snapStart uint64, snapEnd uint64) {
w.lock.Lock()
defer w.lock.Unlock()
if snapEnd < snapStart {
logging.Errorf("MutationStreamReader::updateSnapInFilter Bad Snapshot Received "+
"for %v %v %v %v-%v", meta.bucket, meta.vbucket, w.streamId, snapStart, snapEnd)
}
if snapEnd-snapStart > 50000 {
logging.Errorf("MutationStreamReader::updateSnapInFilter Huge Snapshot Received "+
"for %v %v %v %v-%v", meta.bucket, meta.vbucket, w.streamId, snapStart, snapEnd)
}
if filter, ok := w.bucketFilter[meta.bucket]; ok {
if snapEnd > filter.Snapshots[meta.vbucket][1] &&
filter.Vbuuids[meta.vbucket] != 0 {
//store the existing snap marker in prevSnap map
prevSnap := w.bucketPrevSnapMap[meta.bucket]
prevSnap.Snapshots[meta.vbucket][0] = filter.Snapshots[meta.vbucket][0]
prevSnap.Snapshots[meta.vbucket][1] = filter.Snapshots[meta.vbucket][1]
prevSnap.Vbuuids[meta.vbucket] = filter.Vbuuids[meta.vbucket]
prevSnap.Seqnos[meta.vbucket] = filter.Seqnos[meta.vbucket]
if prevSnap.Snapshots[meta.vbucket][1] != filter.Seqnos[meta.vbucket] {
logging.Warnf("MutationStreamReader::updateSnapInFilter "+
"Bucket %v Stream %v vb %v Partial Snapshot %v-%v Seqno %v vbuuid %v", meta.bucket,
w.streamId, meta.vbucket, prevSnap.Snapshots[meta.vbucket][0],
prevSnap.Snapshots[meta.vbucket][1], filter.Seqnos[meta.vbucket],
prevSnap.Vbuuids[meta.vbucket])
}
filter.Snapshots[meta.vbucket][0] = snapStart
filter.Snapshots[meta.vbucket][1] = snapEnd
logging.Debugf("MutationStreamReader::updateSnapInFilter "+
"bucket %v Stream %v vb %v Snapshot %v-%v Prev Snapshot %v-%v Prev Snapshot vbuuid %v",
meta.bucket, w.streamId, meta.vbucket, snapStart, snapEnd, prevSnap.Snapshots[meta.vbucket][0],
prevSnap.Snapshots[meta.vbucket][1], prevSnap.Vbuuids[meta.vbucket])
} else {
logging.Warnf("MutationStreamReader::updateSnapInFilter Skipped "+
"Snapshot %v-%v for vb %v %v %v. Current Filter %v vbuuid %v", snapStart,
snapEnd, meta.vbucket, meta.bucket, w.streamId,
filter.Snapshots[meta.vbucket][1], filter.Vbuuids[meta.vbucket])
}
} else {
logging.Errorf("MutationStreamReader::updateSnapInFilter Missing"+
"bucket %v in Filter for Stream %v", meta.bucket, w.streamId)
}
}
//updates vbuuid information in bucket filter
func (w *streamWorker) updateVbuuidInFilter(meta *MutationMeta) {
w.lock.Lock()
defer w.lock.Unlock()
if meta.vbuuid == 0 {
logging.Fatalf("MutationStreamReader::updateVbuuidInFilter Received vbuuid %v "+
"bucket %v vb %v Stream %v. This vbucket will not be processed!!!", meta.vbuuid,
meta.bucket, meta.vbucket, w.streamId)
}
if filter, ok := w.bucketFilter[meta.bucket]; ok {
filter.Vbuuids[meta.vbucket] = uint64(meta.vbuuid)
} else {
logging.Errorf("MutationStreamReader::updateVbuuidInFilter Missing"+
"bucket %v vb %v vbuuid %v in Filter for Stream %v", meta.bucket,
meta.vbucket, meta.vbuuid, w.streamId)
}
}
//helper functions
func copyVbList(vbList []uint16) []Vbucket {
c := make([]Vbucket, len(vbList))
for i, vb := range vbList {
c[i] = Vbucket(vb)
}
return c
}
func getSyncBatchInterval(config common.Config) uint64 {
if common.GetStorageMode() == common.FORESTDB {
return config["stream_reader.fdb.syncBatchInterval"].Uint64()
} else {
return config["stream_reader.moi.syncBatchInterval"].Uint64()
}
}
func getMutationBufferSize(config common.Config) uint64 {
if common.GetStorageMode() == common.FORESTDB {
return config["stream_reader.fdb.mutationBuffer"].Uint64()
} else if common.GetStorageMode() == common.PLASMA {
return config["stream_reader.plasma.mutationBuffer"].Uint64()
} else {
return config["stream_reader.moi.mutationBuffer"].Uint64()
}
}
func getWorkerBufferSize(config common.Config) uint64 {
if common.GetStorageMode() == common.FORESTDB {
return config["stream_reader.fdb.workerBuffer"].Uint64()
} else if common.GetStorageMode() == common.PLASMA {
return config["stream_reader.plasma.workerBuffer"].Uint64()
} else {
return config["stream_reader.moi.workerBuffer"].Uint64()
}
}
func overrideDataportConf(dpconf common.Config) common.Config {
if common.GetStorageMode() == common.PLASMA {
chSize := dpconf["plasma.dataChanSize"].Int()
dpconf.SetValue("dataChanSize", chSize)
}
return dpconf
}