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leveldb: add message, config and metrics (#3272)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // Copyright 2021 PingCAP, 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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| package message | ||
|
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||
| import ( | ||
| "fmt" | ||
|
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| "github.com/pingcap/ticdc/cdc/sorter/encoding" | ||
| Iterator "github.com/syndtr/goleveldb/leveldb/iterator" | ||
| lutil "github.com/syndtr/goleveldb/leveldb/util" | ||
| "golang.org/x/sync/semaphore" | ||
| ) | ||
|
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| // Task is a leveldb actor task. It carries write and read request. | ||
| type Task struct { | ||
| UID uint32 | ||
| TableID uint64 | ||
|
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| // encoded key -> serde.marshal(event) | ||
| // If a value is empty, it deletes the key/value entry in leveldb. | ||
| Events map[Key][]byte | ||
| // Must be buffered channel to avoid blocking. | ||
| IterCh chan LimitedIterator `json:"-"` // Make Task JSON printable. | ||
| Irange *lutil.Range | ||
| // Set NeedIter whenever caller wants to read something from an iterator. | ||
| NeedIter bool | ||
| } | ||
|
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| // Key is the key that is written to leveldb. | ||
| type Key string | ||
|
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| // String returns a pretty printed string. | ||
| func (k Key) String() string { | ||
| uid, tableID, startTs, CRTs := encoding.DecodeKey([]byte(k)) | ||
| return fmt.Sprintf( | ||
| "uid: %d, tableID: %d, startTs: %d, CRTs: %d", | ||
| uid, tableID, startTs, CRTs) | ||
| } | ||
|
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| // LimitedIterator is a wrapper of leveldb iterator that has a sema to limit | ||
| // the total number of open iterators. | ||
| type LimitedIterator struct { | ||
| Iterator.Iterator | ||
| Sema *semaphore.Weighted | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| // Copyright 2021 PingCAP, 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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| package message | ||
|
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| import ( | ||
| "testing" | ||
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| "github.com/pingcap/ticdc/cdc/model" | ||
| "github.com/pingcap/ticdc/cdc/sorter/encoding" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
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| func TestPrint(t *testing.T) { | ||
| t.Parallel() | ||
| event := model.NewPolymorphicEvent(&model.RawKVEntry{ | ||
| OpType: model.OpTypeDelete, | ||
| Key: []byte{1}, | ||
| StartTs: 3, | ||
| CRTs: 4, | ||
| }) | ||
|
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| require.Equal(t, "uid: 1, tableID: 2, startTs: 3, CRTs: 4", | ||
| Key(encoding.EncodeKey(1, 2, event)).String()) | ||
| require.Equal(t, "uid: 1, tableID: 2, startTs: 0, CRTs: 3", | ||
| Key(encoding.EncodeTsKey(1, 2, 3)).String()) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| // Copyright 2021 PingCAP, 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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||
| package leveldb | ||
|
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| import ( | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
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| var ( | ||
| sorterWriteBytesHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{ | ||
| Namespace: "ticdc", | ||
| Subsystem: "sorter", | ||
| Name: "leveldb_write_bytes", | ||
| Help: "Bucketed histogram of sorter write batch bytes", | ||
| Buckets: prometheus.ExponentialBuckets(16, 2.0, 20), | ||
| }, []string{"capture", "id"}) | ||
|
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| sorterWriteDurationHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{ | ||
| Namespace: "ticdc", | ||
| Subsystem: "sorter", | ||
| Name: "leveldb_write_duration_seconds", | ||
| Help: "Bucketed histogram of sorter write duration", | ||
| Buckets: prometheus.ExponentialBuckets(0.004, 2.0, 20), | ||
| }, []string{"capture", "id"}) | ||
|
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| sorterCleanupKVCounter = prometheus.NewCounterVec(prometheus.CounterOpts{ | ||
| Namespace: "ticdc", | ||
| Subsystem: "sorter", | ||
| Name: "leveldb_cleanup_kv_total", | ||
| Help: "The total number of cleaned up kv entries", | ||
| }, []string{"capture", "id"}) | ||
| ) | ||
|
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| // InitMetrics registers all metrics in this file | ||
| func InitMetrics(registry *prometheus.Registry) { | ||
| registry.MustRegister(sorterWriteDurationHistogram) | ||
| registry.MustRegister(sorterWriteBytesHistogram) | ||
| registry.MustRegister(sorterCleanupKVCounter) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| // Copyright 2021 PingCAP, 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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||
| package sorter | ||
|
|
||
| import ( | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
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| var ( | ||
| // SorterEventCount is the metric that counts events output by the sorter. | ||
| SorterEventCount = prometheus.NewCounterVec(prometheus.CounterOpts{ | ||
| Namespace: "ticdc", | ||
| Subsystem: "sorter", | ||
| Name: "event_count", | ||
| Help: "The number of events output by the sorter", | ||
| }, []string{"capture", "changefeed", "type"}) | ||
|
|
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| // SorterResolvedTsGauge is the metric that records sorter resolved ts. | ||
| SorterResolvedTsGauge = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Namespace: "ticdc", | ||
| Subsystem: "sorter", | ||
| Name: "resolved_ts_gauge", | ||
| Help: "the resolved ts of the sorter", | ||
| }, []string{"capture", "changefeed"}) | ||
|
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| // SorterInMemoryDataSizeGauge is the metric that records sorter memory usage. | ||
| SorterInMemoryDataSizeGauge = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Namespace: "ticdc", | ||
| Subsystem: "sorter", | ||
| Name: "in_memory_data_size_gauge", | ||
| Help: "The amount of pending data stored in-memory by the sorter", | ||
| }, []string{"capture", "id"}) | ||
|
|
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| // SorterOnDiskDataSizeGauge is the metric that records sorter disk usage. | ||
| SorterOnDiskDataSizeGauge = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Namespace: "ticdc", | ||
| Subsystem: "sorter", | ||
| Name: "on_disk_data_size_gauge", | ||
| Help: "The amount of pending data stored on-disk by the sorter", | ||
| }, []string{"capture", "id"}) | ||
|
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| // SorterOpenFileCountGauge is the metric that records sorter open files. | ||
| SorterOpenFileCountGauge = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Namespace: "ticdc", | ||
| Subsystem: "sorter", | ||
| Name: "open_file_count_gauge", | ||
| Help: "The number of open file descriptors held by the sorter", | ||
| }, []string{"capture", "id"}) | ||
| ) | ||
|
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| // InitMetrics registers all metrics in this file | ||
| func InitMetrics(registry *prometheus.Registry) { | ||
| registry.MustRegister(SorterEventCount) | ||
| registry.MustRegister(SorterResolvedTsGauge) | ||
| registry.MustRegister(SorterInMemoryDataSizeGauge) | ||
| registry.MustRegister(SorterOnDiskDataSizeGauge) | ||
| registry.MustRegister(SorterOpenFileCountGauge) | ||
| } |
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