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feat: optimize route switching when freeze segment #321

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feat: optimize route switching when freeze segment #321

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9c505cc
feat: Optimize the routing logic for segment full
hwjiangkai Dec 5, 2022
074e7f9
fix review
hwjiangkai Dec 9, 2022
9351af1
feat: fix review comments
hwjiangkai Dec 21, 2022
88c1479
Merge branch 'main' of github.com:linkall-labs/vanus into segment
hwjiangkai Dec 21, 2022
5b3b241
feat: fix review comments
hwjiangkai Dec 22, 2022
8b9f873
Merge branch 'main' of github.com:linkall-labs/vanus into segment
hwjiangkai Feb 6, 2023
8c06b70
fix review comments
hwjiangkai Feb 6, 2023
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44 changes: 24 additions & 20 deletions client/internal/vanus/eventlog/name_service.go
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Original file line number Diff line number Diff line change
Expand Up @@ -47,13 +47,13 @@ type NameService struct {
tracer *tracing.Tracer
}

func (ns *NameService) LookupWritableSegment(ctx context.Context, logID uint64) (*record.Segment, error) {
func (ns *NameService) LookupWritableSegment(ctx context.Context, logID uint64) ([]*record.Segment, error) {
ctx, span := ns.tracer.Start(ctx, "LookupWritableSegment")
defer span.End()

req := &ctrlpb.GetAppendableSegmentRequest{
EventLogId: logID,
Limited: 1,
Limited: 2,
}

resp, err := ns.client.GetAppendableSegment(ctx, req)
Expand All @@ -65,26 +65,28 @@ func (ns *NameService) LookupWritableSegment(ctx context.Context, logID uint64)
if len(segments) == 0 {
return nil, errors.ErrNotWritable
}
return segments[0], nil
return segments, nil
}

func (ns *NameService) LookupReadableSegments(ctx context.Context, logID uint64) ([]*record.Segment, error) {
ctx, span := ns.tracer.Start(ctx, "LookupReadableSegments")
defer span.End()

req := &ctrlpb.ListSegmentRequest{
EventLogId: logID,
StartOffset: 0,
EndOffset: math.MaxInt64,
Limited: math.MaxInt32,
req := &ctrlpb.GetReadableSegmentRequest{
EventLogId: logID,
Limited: math.MaxInt32,
}

resp, err := ns.client.ListSegment(ctx, req)
resp, err := ns.client.GetReadableSegment(ctx, req)
if err != nil {
return nil, err
}

segments := toSegments(resp.GetSegments())
if len(segments) == 0 {
return nil, errors.ErrNotReadable
}

return segments, nil
}

Expand All @@ -97,9 +99,9 @@ func toSegments(pbs []*metapb.Segment) []*record.Segment {
segment := toSegment(pb)
segments = append(segments, segment)
// only return first working segment
if segment.Writable {
break
}
// if segment.Writable {
// break
// }
}
return segments
}
Expand All @@ -113,13 +115,15 @@ func toSegment(segment *metapb.Segment) *record.Segment {
}
}
return &record.Segment{
ID: segment.GetId(),
StartOffset: segment.GetStartOffsetInLog(),
EndOffset: segment.GetEndOffsetInLog(),
FirstEventBornAt: time.UnixMilli(segment.FirstEventBornAtByUnixMs),
LastEventBornAt: time.UnixMilli(segment.LastEvnetBornAtByUnixMs),
Writable: segment.State == "working", // TODO: writable
Blocks: blocks,
LeaderBlockID: segment.GetLeaderBlockId(),
ID: segment.GetId(),
PreviousSegmentId: segment.GetPreviousSegmentId(),
NextSegmentId: segment.GetNextSegmentId(),
StartOffset: segment.GetStartOffsetInLog(),
EndOffset: segment.GetEndOffsetInLog(),
FirstEventBornAt: time.UnixMilli(segment.FirstEventBornAtByUnixMs),
LastEventBornAt: time.UnixMilli(segment.LastEvnetBornAtByUnixMs),
Writable: segment.State == "working", // TODO: writable
Blocks: blocks,
LeaderBlockID: segment.GetLeaderBlockId(),
}
}
4 changes: 2 additions & 2 deletions client/pkg/api/client.go
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Original file line number Diff line number Diff line change
Expand Up @@ -31,8 +31,8 @@ type Eventbus interface {
}

type BusWriter interface {
AppendOne(ctx context.Context, event *ce.Event, opts ...WriteOption) (eid string, err error)
AppendMany(ctx context.Context, events []*ce.Event, opts ...WriteOption) (eid string, err error)
AppendOne(ctx context.Context, event *ce.Event, opts ...WriteOption) (string, error)
AppendMany(ctx context.Context, events []*ce.Event, opts ...WriteOption) (string, error)
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must return ([]string, error).

}

type BusReader interface {
Expand Down
50 changes: 21 additions & 29 deletions client/pkg/eventbus/eventbus.go
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Original file line number Diff line number Diff line change
Expand Up @@ -17,8 +17,6 @@ package eventbus
import (
// standard libraries.
"context"
"encoding/base64"
"encoding/binary"
stderrors "errors"
"io"
"strings"
Expand All @@ -37,7 +35,7 @@ import (
"github.com/linkall-labs/vanus/client/pkg/errors"
"github.com/linkall-labs/vanus/client/pkg/eventlog"
"github.com/linkall-labs/vanus/client/pkg/policy"
vlog "github.com/linkall-labs/vanus/observability/log"
"github.com/linkall-labs/vanus/observability/log"

eb "github.com/linkall-labs/vanus/client/internal/vanus/eventbus"
el "github.com/linkall-labs/vanus/client/internal/vanus/eventlog"
Expand Down Expand Up @@ -66,7 +64,7 @@ func NewEventbus(cfg *eb.Config) *eventbus {
for {
re, ok := <-ch
if !ok {
vlog.Debug(context.Background(), "eventbus quits writable watcher", map[string]interface{}{
log.Debug(context.Background(), "eventbus quits writable watcher", map[string]interface{}{
"eventbus": bus.cfg.Name,
})
break
Expand All @@ -88,7 +86,7 @@ func NewEventbus(cfg *eb.Config) *eventbus {
for {
re, ok := <-ch
if !ok {
vlog.Debug(context.Background(), "eventbus quits readable watcher", map[string]interface{}{
log.Debug(context.Background(), "eventbus quits readable watcher", map[string]interface{}{
"eventbus": bus.cfg.Name,
})
break
Expand Down Expand Up @@ -187,16 +185,16 @@ func (b *eventbus) GetLog(ctx context.Context, logID uint64, opts ...api.LogOpti
if len(b.readableLogs) == 0 {
ifplusor marked this conversation as resolved.
Show resolved Hide resolved
b.refreshReadableLogs(ctx)
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unlock when refresh route info.

}
if log, ok := b.readableLogs[logID]; ok {
return log, nil
if l, ok := b.readableLogs[logID]; ok {
ifplusor marked this conversation as resolved.
Show resolved Hide resolved
return l, nil
}
return nil, errors.ErrNotFound
} else if op.Policy.AccessMode() == api.ReadWrite {
if len(b.writableLogs) == 0 {
ifplusor marked this conversation as resolved.
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b.refreshWritableLogs(ctx)
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unlock when refresh route info.

}
if log, ok := b.writableLogs[logID]; ok {
return log, nil
if l, ok := b.writableLogs[logID]; ok {
ifplusor marked this conversation as resolved.
Show resolved Hide resolved
return l, nil
}
return nil, errors.ErrNotFound
} else {
Expand Down Expand Up @@ -312,8 +310,8 @@ func (b *eventbus) updateWritableLogs(ctx context.Context, re *WritableLogsResul
Endpoints: b.cfg.Endpoints,
ID: logID,
}
log := eventlog.NewEventLog(cfg)
lws[logID] = log
l := eventlog.NewEventLog(cfg)
lws[logID] = l
return true
})
b.setWritableLogs(s, lws)
Expand Down Expand Up @@ -407,8 +405,8 @@ func (b *eventbus) updateReadableLogs(ctx context.Context, re *ReadableLogsResul
Endpoints: b.cfg.Endpoints,
ID: logID,
}
log := eventlog.NewEventLog(cfg)
lws[logID] = log
l := eventlog.NewEventLog(cfg)
lws[logID] = l
return true
})
b.setReadableLogs(s, lws)
Expand Down Expand Up @@ -451,7 +449,7 @@ type busWriter struct {

var _ api.BusWriter = (*busWriter)(nil)

func (w *busWriter) AppendOne(ctx context.Context, event *ce.Event, opts ...api.WriteOption) (eid string, err error) {
func (w *busWriter) AppendOne(ctx context.Context, event *ce.Event, opts ...api.WriteOption) (string, error) {
_ctx, span := w.tracer.Start(ctx, "AppendOne")
defer span.End()

Expand All @@ -470,21 +468,15 @@ func (w *busWriter) AppendOne(ctx context.Context, event *ce.Event, opts ...api.
}

// 2. append the event to the eventlog
off, err := lw.Append(_ctx, event)
eid, err := lw.Append(_ctx, event)
if err != nil {
return "", err
}

// 3. generate event ID
var buf [16]byte
binary.BigEndian.PutUint64(buf[0:8], lw.Log().ID())
binary.BigEndian.PutUint64(buf[8:16], uint64(off))
encoded := base64.StdEncoding.EncodeToString(buf[:])

return encoded, nil
return eid, nil
}

func (w *busWriter) AppendMany(ctx context.Context, events []*ce.Event, opts ...api.WriteOption) (eid string, err error) {
func (w *busWriter) AppendMany(ctx context.Context, events []*ce.Event, opts ...api.WriteOption) (string, error) {
// TODO(jiangkai): implement this method, by jiangkai, 2022.10.24
return "", nil
}
Expand All @@ -497,17 +489,17 @@ func (w *busWriter) pickWritableLog(ctx context.Context, opts *api.WriteOptions)
_ctx, span := w.tracer.Start(ctx, "pickWritableLog")
defer span.End()

log, err := opts.Policy.NextLog(ctx)
l, err := opts.Policy.NextLog(ctx)
if err != nil {
return nil, err
}

l := w.ebus.getWritableLog(_ctx, log.ID())
if l == nil {
lw := w.ebus.getWritableLog(_ctx, l.ID())
if lw == nil {
return nil, stderrors.New("can not pick writable log")
}

return l.Writer(), nil
return lw.Writer(), nil
}

type busReader struct {
Expand Down Expand Up @@ -558,11 +550,11 @@ func (r *busReader) pickReadableLog(ctx context.Context, opts *api.ReadOptions)
_ctx, span := r.tracer.Start(ctx, "pickReadableLog")
defer span.End()

log, err := opts.Policy.NextLog(ctx)
l, err := opts.Policy.NextLog(ctx)
if err != nil {
return nil, err
}
lr := r.ebus.getReadableLog(_ctx, log.ID())
lr := r.ebus.getReadableLog(_ctx, l.ID())
if lr == nil {
return nil, stderrors.New("can not pick readable log")
}
Expand Down
2 changes: 1 addition & 1 deletion client/pkg/eventlog/eventlog.go
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ type LogWriter interface {

Close(ctx context.Context)

Append(ctx context.Context, event *ce.Event) (off int64, err error)
Append(ctx context.Context, event *ce.Event) (eid string, err error)
}

type LogReader interface {
Expand Down
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