mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-05 21:39:19 +08:00
88b373b024
issue: #34357
Go Parquet uses dictionary encoding by default, and it will fall back to
plain encoding if the dictionary size exceeds the dictionary size page
limit. Users can specify custom fallback encoding by using
`parquet.WithEncoding(ENCODING_METHOD)` in writer properties. However,
Go Parquet [fallbacks to plain
encoding](e65c1e295d/go/parquet/file/column_writer_types.gen.go.tmpl (L238)
)
rather than custom encoding method users provide. Therefore, this patch
only turns off dictionary encoding for the primary key.
With a 5 million auto ID primary key benchmark, the parquet file size
improves from 13.93 MB to 8.36 MB when dictionary encoding is turned
off, reducing primary key storage space by 40%.
Signed-off-by: shaoting-huang <shaoting.huang@zilliz.com>
322 lines
9.3 KiB
Go
322 lines
9.3 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package storage
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
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"github.com/milvus-io/milvus/pkg/common"
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)
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// BinlogType is to distinguish different files saving different data.
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type BinlogType int32
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const (
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// InsertBinlog BinlogType for insert data
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InsertBinlog BinlogType = iota
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// DeleteBinlog BinlogType for delete data
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DeleteBinlog
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// DDLBinlog BinlogType for DDL
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DDLBinlog
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// IndexFileBinlog BinlogType for index
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IndexFileBinlog
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// StatsBinlog BinlogType for stats data
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StatsBinlog
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)
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const (
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// MagicNumber used in binlog
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MagicNumber int32 = 0xfffabc
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)
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type baseBinlogWriter struct {
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descriptorEvent
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magicNumber int32
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binlogType BinlogType
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eventWriters []EventWriter
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buffer *bytes.Buffer
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length int32
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}
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func (writer *baseBinlogWriter) isClosed() bool {
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return writer.buffer != nil
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}
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// GetEventNums returns the number of event writers
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func (writer *baseBinlogWriter) GetEventNums() int32 {
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return int32(len(writer.eventWriters))
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}
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// GetRowNums returns writer's number of rows
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func (writer *baseBinlogWriter) GetRowNums() (int32, error) {
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if writer.isClosed() {
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return writer.length, nil
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}
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length := 0
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for _, e := range writer.eventWriters {
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rows, err := e.GetPayloadLengthFromWriter()
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if err != nil {
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return 0, err
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}
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length += rows
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}
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return int32(length), nil
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}
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// GetBinlogType returns writer's binlogType
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func (writer *baseBinlogWriter) GetBinlogType() BinlogType {
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return writer.binlogType
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}
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// GetBuffer gets binlog buffer. Return nil if binlog is not finished yet.
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func (writer *baseBinlogWriter) GetBuffer() ([]byte, error) {
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if writer.buffer == nil {
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return nil, fmt.Errorf("please close binlog before get buffer")
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}
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return writer.buffer.Bytes(), nil
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}
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// Finish allocates buffer and releases resource
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func (writer *baseBinlogWriter) Finish() error {
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if writer.buffer != nil {
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return nil
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}
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if writer.StartTimestamp == 0 || writer.EndTimestamp == 0 {
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return fmt.Errorf("invalid start/end timestamp")
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}
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var offset int32
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writer.buffer = new(bytes.Buffer)
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if err := binary.Write(writer.buffer, common.Endian, MagicNumber); err != nil {
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return err
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}
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offset += int32(binary.Size(MagicNumber))
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if err := writer.descriptorEvent.Write(writer.buffer); err != nil {
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return err
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}
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offset += writer.descriptorEvent.GetMemoryUsageInBytes()
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writer.length = 0
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for _, w := range writer.eventWriters {
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w.SetOffset(offset)
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if err := w.Finish(); err != nil {
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return err
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}
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if err := w.Write(writer.buffer); err != nil {
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return err
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}
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length, err := w.GetMemoryUsageInBytes()
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if err != nil {
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return err
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}
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offset += length
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rows, err := w.GetPayloadLengthFromWriter()
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if err != nil {
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return err
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}
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writer.length += int32(rows)
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}
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return nil
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}
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func (writer *baseBinlogWriter) Close() {
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for _, e := range writer.eventWriters {
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e.Close()
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}
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}
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// InsertBinlogWriter is an object to write binlog file which saves insert data.
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type InsertBinlogWriter struct {
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baseBinlogWriter
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}
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// NextInsertEventWriter returns an event writer to write insert data to an event.
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func (writer *InsertBinlogWriter) NextInsertEventWriter(opts ...PayloadWriterOptions) (*insertEventWriter, error) {
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if writer.isClosed() {
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return nil, fmt.Errorf("binlog has closed")
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}
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event, err := newInsertEventWriter(writer.PayloadDataType, opts...)
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if err != nil {
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return nil, err
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}
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writer.eventWriters = append(writer.eventWriters, event)
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return event, nil
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}
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// DeleteBinlogWriter is an object to write binlog file which saves delete data.
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type DeleteBinlogWriter struct {
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baseBinlogWriter
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}
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// NextDeleteEventWriter returns an event writer to write delete data to an event.
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func (writer *DeleteBinlogWriter) NextDeleteEventWriter(opts ...PayloadWriterOptions) (*deleteEventWriter, error) {
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if writer.isClosed() {
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return nil, fmt.Errorf("binlog has closed")
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}
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event, err := newDeleteEventWriter(writer.PayloadDataType, opts...)
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if err != nil {
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return nil, err
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}
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writer.eventWriters = append(writer.eventWriters, event)
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return event, nil
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}
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// DDLBinlogWriter is an object to write binlog file which saves ddl information.
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type DDLBinlogWriter struct {
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baseBinlogWriter
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}
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// NextCreateCollectionEventWriter returns an event writer to write CreateCollection
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// information to an event.
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func (writer *DDLBinlogWriter) NextCreateCollectionEventWriter() (*createCollectionEventWriter, error) {
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if writer.isClosed() {
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return nil, fmt.Errorf("binlog has closed")
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}
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event, err := newCreateCollectionEventWriter(writer.PayloadDataType)
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if err != nil {
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return nil, err
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}
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writer.eventWriters = append(writer.eventWriters, event)
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return event, nil
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}
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// NextDropCollectionEventWriter returns an event writer to write DropCollection
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// information to an event.
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func (writer *DDLBinlogWriter) NextDropCollectionEventWriter() (*dropCollectionEventWriter, error) {
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if writer.isClosed() {
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return nil, fmt.Errorf("binlog has closed")
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}
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event, err := newDropCollectionEventWriter(writer.PayloadDataType)
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if err != nil {
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return nil, err
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}
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writer.eventWriters = append(writer.eventWriters, event)
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return event, nil
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}
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// NextCreatePartitionEventWriter returns an event writer to write CreatePartition
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// information to an event.
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func (writer *DDLBinlogWriter) NextCreatePartitionEventWriter() (*createPartitionEventWriter, error) {
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if writer.isClosed() {
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return nil, fmt.Errorf("binlog has closed")
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}
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event, err := newCreatePartitionEventWriter(writer.PayloadDataType)
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if err != nil {
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return nil, err
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}
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writer.eventWriters = append(writer.eventWriters, event)
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return event, nil
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}
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// NextDropPartitionEventWriter returns an event writer to write DropPartition
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// information to an event.
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func (writer *DDLBinlogWriter) NextDropPartitionEventWriter() (*dropPartitionEventWriter, error) {
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if writer.isClosed() {
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return nil, fmt.Errorf("binlog has closed")
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}
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event, err := newDropPartitionEventWriter(writer.PayloadDataType)
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if err != nil {
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return nil, err
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}
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writer.eventWriters = append(writer.eventWriters, event)
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return event, nil
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}
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// IndexFileBinlogWriter is an object to write binlog file which saves index files
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type IndexFileBinlogWriter struct {
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baseBinlogWriter
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}
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// NextIndexFileEventWriter return next available EventWriter
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func (writer *IndexFileBinlogWriter) NextIndexFileEventWriter() (*indexFileEventWriter, error) {
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if writer.isClosed() {
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return nil, fmt.Errorf("binlog has closed")
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}
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event, err := newIndexFileEventWriter(writer.PayloadDataType)
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if err != nil {
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return nil, err
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}
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writer.eventWriters = append(writer.eventWriters, event)
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return event, nil
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}
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// NewInsertBinlogWriter creates InsertBinlogWriter to write binlog file.
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func NewInsertBinlogWriter(dataType schemapb.DataType, collectionID, partitionID, segmentID, FieldID int64, nullable bool) *InsertBinlogWriter {
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descriptorEvent := newDescriptorEvent()
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descriptorEvent.PayloadDataType = dataType
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descriptorEvent.CollectionID = collectionID
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descriptorEvent.PartitionID = partitionID
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descriptorEvent.SegmentID = segmentID
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descriptorEvent.FieldID = FieldID
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// store nullable in extra for compatible
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descriptorEvent.AddExtra(nullableKey, nullable)
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w := &InsertBinlogWriter{
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baseBinlogWriter: baseBinlogWriter{
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descriptorEvent: *descriptorEvent,
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magicNumber: MagicNumber,
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binlogType: InsertBinlog,
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eventWriters: make([]EventWriter, 0),
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buffer: nil,
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},
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}
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return w
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}
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// NewDeleteBinlogWriter creates DeleteBinlogWriter to write binlog file.
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func NewDeleteBinlogWriter(dataType schemapb.DataType, collectionID, partitionID, segmentID int64) *DeleteBinlogWriter {
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descriptorEvent := newDescriptorEvent()
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descriptorEvent.PayloadDataType = dataType
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descriptorEvent.CollectionID = collectionID
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descriptorEvent.PartitionID = partitionID
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descriptorEvent.SegmentID = segmentID
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w := &DeleteBinlogWriter{
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baseBinlogWriter: baseBinlogWriter{
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descriptorEvent: *descriptorEvent,
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magicNumber: MagicNumber,
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binlogType: DeleteBinlog,
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eventWriters: make([]EventWriter, 0),
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buffer: nil,
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},
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}
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return w
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}
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// NewDDLBinlogWriter creates DDLBinlogWriter to write binlog file.
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func NewDDLBinlogWriter(dataType schemapb.DataType, collectionID int64) *DDLBinlogWriter {
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descriptorEvent := newDescriptorEvent()
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descriptorEvent.PayloadDataType = dataType
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descriptorEvent.CollectionID = collectionID
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w := &DDLBinlogWriter{
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baseBinlogWriter: baseBinlogWriter{
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descriptorEvent: *descriptorEvent,
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magicNumber: MagicNumber,
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binlogType: DDLBinlog,
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eventWriters: make([]EventWriter, 0),
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buffer: nil,
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},
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}
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return w
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}
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