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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>
80 lines
2.6 KiB
Go
80 lines
2.6 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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"fmt"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
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)
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func TestBinlogWriterReader(t *testing.T) {
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binlogWriter := NewInsertBinlogWriter(schemapb.DataType_Int32, 10, 20, 30, 40, false)
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tp := binlogWriter.GetBinlogType()
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assert.Equal(t, tp, InsertBinlog)
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binlogWriter.SetEventTimeStamp(1000, 2000)
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defer binlogWriter.Close()
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eventWriter, err := binlogWriter.NextInsertEventWriter()
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assert.NoError(t, err)
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err = eventWriter.AddInt32ToPayload([]int32{1, 2, 3}, nil)
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assert.NoError(t, err)
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_, err = binlogWriter.GetBuffer()
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assert.Error(t, err)
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eventWriter.SetEventTimestamp(1000, 2000)
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nums, err := binlogWriter.GetRowNums()
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assert.NoError(t, err)
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assert.EqualValues(t, 3, nums)
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sizeTotal := 20000000
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binlogWriter.baseBinlogWriter.descriptorEventData.AddExtra(originalSizeKey, fmt.Sprintf("%v", sizeTotal))
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err = binlogWriter.Finish()
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assert.NoError(t, err)
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assert.EqualValues(t, 1, binlogWriter.GetEventNums())
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nums, err = binlogWriter.GetRowNums()
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assert.NoError(t, err)
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assert.EqualValues(t, 3, nums)
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err = eventWriter.AddInt32ToPayload([]int32{1, 2, 3}, nil)
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assert.Error(t, err)
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nums, err = binlogWriter.GetRowNums()
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assert.NoError(t, err)
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assert.EqualValues(t, 3, nums)
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buffer, err := binlogWriter.GetBuffer()
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assert.NoError(t, err)
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binlogWriter.Close()
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binlogReader, err := NewBinlogReader(buffer)
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assert.NoError(t, err)
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eventReader, err := binlogReader.NextEventReader()
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assert.NoError(t, err)
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_, _, err = eventReader.GetInt8FromPayload()
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assert.Error(t, err)
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payload, _, err := eventReader.GetInt32FromPayload()
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assert.NoError(t, err)
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assert.EqualValues(t, 3, len(payload))
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assert.EqualValues(t, 1, payload[0])
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assert.EqualValues(t, 2, payload[1])
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assert.EqualValues(t, 3, payload[2])
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reader, err := binlogReader.NextEventReader()
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assert.NoError(t, err)
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assert.Nil(t, reader)
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}
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