src/dedo.go: Remove Bucket.FillPercent option

1 files changed, 3 insertions, 30 deletions

diff --git a/src/dedo.go b/src/dedo.go
index f6351e3..437680b 100644
--- a/src/dedo.go
+++ b/src/dedo.go
@@ -25,9 +25,6 @@ import (
 	"unicode"
 	"unicode/utf8"
 	"unsafe"
-
-
-	g "gobang"
 )
 
 
@@ -52,13 +49,6 @@ type Bucket struct {
 	page     *page              // inline page reference
 	rootNode *node              // materialized node for the root page.
 	nodes    map[pgid]*node     // node cache
-
-	// Sets the threshold for filling nodes when they split. By default,
-	// the bucket will fill to 50% but it can be useful to increase this
-	// amount if you know that your write workloads are mostly append-only.
-	//
-	// This is non-persisted across transactions so it must be set in every Tx.
-	FillPercent float64
 }
 
 // BucketStats records statistics about resources used by a bucket.
@@ -425,7 +415,6 @@ type BenchOptions struct {
 	MemProfile    string
 	BlockProfile  string
 	StatsInterval time.Duration
-	FillPercent   float64
 	Work          bool
 	Path          string
 }
@@ -481,13 +470,6 @@ const (
 
 	bucketHeaderSize = int(unsafe.Sizeof(bucket{}))
 
-	minFillPercent = 0.1
-	maxFillPercent = 1.0
-
-	// DefaultFillPercent is the percentage that split pages are filled.
-	// This value can be changed by setting Bucket.FillPercent.
-	DefaultFillPercent = 0.5
-
 	// The largest step that can be taken when remapping the mmap.
 	maxMmapStep = 1 << 30 // 1GB
 
@@ -725,7 +707,7 @@ func madvise(b []byte, advice int) (err error) {
 
 // newBucket returns a new bucket associated with a transaction.
 func newBucket(tx *Tx) Bucket {
-	var b = Bucket{tx: tx, FillPercent: DefaultFillPercent}
+	var b = Bucket{tx: tx}
 	if tx.writable {
 		b.buckets = make(map[string]*Bucket)
 		b.nodes = make(map[pgid]*node)
@@ -848,7 +830,6 @@ func (b *Bucket) CreateBucket(key []byte) (*Bucket, error) {
 	var bucket = Bucket{
 		ref:         &bucket{},
 		rootNode:    &node{isLeaf: true},
-		FillPercent: DefaultFillPercent,
 	}
 	var value = bucket.write()
 
@@ -3132,18 +3113,14 @@ func (n *node) split(pageSize int) []*node {
 // splitTwo breaks up a node into two smaller nodes, if appropriate.
 // This should only be called from the split() function.
 func (n *node) splitTwo(pageSize int) (*node, *node) {
+	const fillPercent = 0.5
+
 	// Ignore the split if the page doesn't have at least enough nodes for
 	// two pages or if the nodes can fit in a single page.
 	if len(n.inodes) <= (minKeysPerPage*2) || n.sizeLessThan(pageSize) {
 		return n, nil
 	}
 
-	// Determine the threshold before starting a new node.
-	fillPercent := g.Clamp(
-		n.bucket.FillPercent,
-		minFillPercent,
-		maxFillPercent,
-	)
 	threshold := int(float64(pageSize) * fillPercent)
 
 	// Determine split position and sizes of the two pages.
@@ -5035,7 +5012,6 @@ func (cmd *BenchCommand) ParseFlags(args []string) (*BenchOptions, error) {
 	fs.StringVar(&options.CPUProfile, "cpuprofile", "", "")
 	fs.StringVar(&options.MemProfile, "memprofile", "", "")
 	fs.StringVar(&options.BlockProfile, "blockprofile", "", "")
-	fs.Float64Var(&options.FillPercent, "fill-percent", DefaultFillPercent, "")
 	fs.BoolVar(&options.Work, "work", false, "")
 	fs.StringVar(&options.Path, "path", "", "")
 	fs.SetOutput(cmd.Stderr)
@@ -5125,7 +5101,6 @@ func (cmd *BenchCommand) runWritesWithSource(db *DB, options *BenchOptions, resu
 	for i := 0; i < options.Iterations; i += options.BatchSize {
 		if err := db.Update(func(tx *Tx) error {
 			b, _ := tx.CreateBucketIfNotExists(benchBucketName)
-			b.FillPercent = options.FillPercent
 
 			for j := 0; j < options.BatchSize; j++ {
 				key := make([]byte, options.KeySize)
@@ -5157,7 +5132,6 @@ func (cmd *BenchCommand) runWritesNestedWithSource(db *DB, options *BenchOptions
 			if err != nil {
 				return err
 			}
-			top.FillPercent = options.FillPercent
 
 			// Create bucket key.
 			name := make([]byte, options.KeySize)
@@ -5168,7 +5142,6 @@ func (cmd *BenchCommand) runWritesNestedWithSource(db *DB, options *BenchOptions
 			if err != nil {
 				return err
 			}
-			b.FillPercent = options.FillPercent
 
 			for j := 0; j < options.BatchSize; j++ {
 				var key = make([]byte, options.KeySize)