github.com/siglens/siglens@v0.0.0-20240328180423-f7ce9ae441ed/pkg/segment/reader/segread/segreader_test.go

/*
Copyright 2023.

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 segread

import (
	"fmt"
	"os"
	"testing"
	"time"

	"github.com/cespare/xxhash"
	"github.com/siglens/siglens/pkg/config"
	"github.com/siglens/siglens/pkg/segment/reader/microreader"
	"github.com/siglens/siglens/pkg/segment/structs"
	segutils "github.com/siglens/siglens/pkg/segment/utils"
	"github.com/siglens/siglens/pkg/segment/writer"
	"github.com/siglens/siglens/pkg/utils"
	log "github.com/sirupsen/logrus"
	"github.com/stretchr/testify/assert"
)

func Test_segReader(t *testing.T) {

	segDir := "data/"
	_ = os.MkdirAll(segDir, 0755)
	segKey := segDir + "test"
	numBlocks := 10
	numEntriesInBlock := 10
	_, bsm, _, cols, blockmeta, _ := writer.WriteMockColSegFile(segKey, numBlocks, numEntriesInBlock)

	assert.Greater(t, len(cols), 1)
	var queryCol string

	// test across multiple columns types
	for queryCol = range cols {
		if queryCol == config.GetTimeStampKey() {
			continue // ingore ts
		}
		fileName := fmt.Sprintf("%s_%v.csg", segKey, xxhash.Sum64String(queryCol))

		log.Infof("testing with %s", fileName)
		fd, err := os.Open(fileName)
		assert.NoError(t, err)
		sReader, err := InitNewSegFileReader(fd, queryCol, blockmeta, 0, bsm)
		assert.Nil(t, err)

		// invalid block
		_, err = sReader.ReadRecordFromBlock(uint16(numBlocks), uint16(numEntriesInBlock))
		assert.NotNil(t, err)
		// correct block, incorrect recordNum
		_, err = sReader.ReadRecordFromBlock(0, uint16(numEntriesInBlock))
		assert.NotNil(t, err, "col %s should not have %+v entries", queryCol, numEntriesInBlock+1)

		// correct block, correct recordNum
		arr, err := sReader.ReadRecordFromBlock(0, uint16(numEntriesInBlock-3))
		assert.Nil(t, err)
		assert.NotNil(t, arr)
		cVal, _, err := writer.GetCvalFromRec(arr, 23)
		assert.Nil(t, err)
		assert.NotNil(t, cVal)
		log.Infof("GetCvalFromRec: %+v for column %s", cVal, queryCol)

		err = sReader.Close()
		assert.Nil(t, err)
	}

	os.RemoveAll(segDir)
}

func Test_timeReader(t *testing.T) {

	config.InitializeTestingConfig()
	segDir := "data/"
	_ = os.MkdirAll(segDir, 0755)
	segKey := segDir + "test-time"
	numBlocks := 10
	numEntriesInBlock := 10
	_, bSum, _, cols, blockmeta, _ := writer.WriteMockColSegFile(segKey, numBlocks, numEntriesInBlock)

	assert.Greater(t, len(cols), 1)
	timeReader, err := InitNewTimeReaderFromBlockSummaries(segKey, config.GetTimeStampKey(), blockmeta, bSum, 0)
	assert.Nil(t, err)

	// test across multiple columns types
	for blockNum := 0; blockNum < numBlocks; blockNum++ {
		currRecs, err := timeReader.GetAllTimeStampsForBlock(uint16(blockNum))
		assert.Nil(t, err)
		assert.Len(t, currRecs, numEntriesInBlock)

		startTs := uint64(1)
		for _, readTs := range currRecs {
			assert.Equal(t, startTs, readTs)
			startTs++
		}
	}
	os.RemoveAll(segDir)
}

func Benchmark_readColumnarFile(b *testing.B) {
	segKey := "/Users/ssubramanian/Desktop/SigLens/siglens/data/Sris-MacBook-Pro.local/final/2022/02/21/01/valtix2/10005995996882630313/0"
	sumFile := structs.GetBsuFnameFromSegKey(segKey)

	numRecsPerBlock := make(map[uint16]uint16)
	maxRecReadInBlock := make(map[uint16]uint16)
	blockSums, allBlockInfo, _, err := microreader.ReadBlockSummaries(sumFile, []byte{})
	assert.Nil(b, err)

	for idx, bSum := range blockSums {
		numRecsPerBlock[uint16(idx)] = bSum.RecCount
	}

	colName := "device_type"

	colCSG := fmt.Sprintf("%s_%v.csg", segKey, xxhash.Sum64String(colName))
	fd, err := os.Open(colCSG)
	assert.NoError(b, err)
	fileReader, err := InitNewSegFileReader(fd, colName, allBlockInfo, 0, blockSums)
	assert.Nil(b, err)

	b.ResetTimer()
	failedBlocks := make(map[uint16]bool)

	sTime := time.Now()
	numRead := 0
	for blkNum := range allBlockInfo {
		for i := uint16(0); i < numRecsPerBlock[blkNum]; i++ {
			rawRec, err := fileReader.ReadRecordFromBlock(blkNum, i)
			numRead++
			assert.Nil(b, err)
			assert.NotNil(b, rawRec)
			if err != nil {
				log.Errorf("Failed to read rec %+d from block %d: %v", i, blkNum, err)
				failedBlocks[blkNum] = true
				break
			}
			maxRecReadInBlock[blkNum] = i
		}
	}

	log.Infof("Read %+v records in %v", numRead, time.Since(sTime))
	err = fileReader.Close()
	assert.Nil(b, err)
}

func Test_packUnpackDictEnc(t *testing.T) {

	colWip := &writer.ColWip{}
	deCount := uint16(100)

	deMap := make(map[string][]uint16)
	recCounts := uint16(100)

	allBlockSummaries := make([]*structs.BlockSummary, 1)
	allBlockSummaries[0] = &structs.BlockSummary{RecCount: recCounts}

	cname := "muycname"
	sfr := &SegmentFileReader{
		blockSummaries: allBlockSummaries,
		deTlv:          make([][]byte, 0),
		deRecToTlv:     make([]uint16, 0),
		currBlockNum:   0,
		ColName:        cname,
	}

	recNum := uint16(0)
	for dwIdx := uint16(0); dwIdx < deCount; dwIdx++ {

		cval := fmt.Sprintf("mycval-%v", dwIdx)
		cvalBytes := make([]byte, 3+len(cval))
		cvalBytes[0] = segutils.VALTYPE_ENC_SMALL_STRING[0]
		copy(cvalBytes[1:], utils.Uint16ToBytesLittleEndian(uint16(len(cval))))
		copy(cvalBytes[3:], cval)

		arr := make([]uint16, recCounts/deCount)
		deMap[string(cvalBytes)] = arr
		for rn := uint16(0); rn < recCounts/deCount; rn++ {
			arr[rn] = recNum + rn
		}
		recNum += recCounts / deCount
	}

	colWip.SetDeCount(deCount)
	colWip.SetDeMap(deMap)

	writer.PackDictEnc(colWip)
	buf, idx := colWip.GetBufAndIdx()

	err := sfr.readDictEnc(buf[0:idx], 0)
	assert.Nil(t, err)

	orderedRecNums := make([]uint16, recCounts)
	for i := uint16(0); i < recCounts; i++ {
		orderedRecNums[i] = i
	}

	results := make(map[uint16]map[string]interface{})
	_ = sfr.deToResults(results, orderedRecNums)

	for rn, val := range results {
		dWord := val[cname]
		expected := fmt.Sprintf("mycval-%v", rn)
		assert.Equal(t, dWord, expected)
	}
}