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feat(info): print total size of listed keys #2149

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merged 1 commit into from
Jan 9, 2025
Merged

feat(info): print total size of listed keys #2149

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21 changes: 13 additions & 8 deletions badger/cmd/info.go
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Original file line number Diff line number Diff line change
Expand Up @@ -173,17 +173,21 @@ func showKeys(db *badger.DB, prefix []byte) error {
it := txn.NewIterator(iopt)
defer it.Close()

totalKeys := 0
var totalKeys, totalSize int64
for it.Rewind(); it.Valid(); it.Next() {
item := it.Item()
if err := printKey(item, false); err != nil {
itemSize, err := printKeyReturnSize(item, false)
if err != nil {
return y.Wrapf(err, "failed to print information about key: %x(%d)",
item.Key(), item.Version())
}

totalKeys++
totalSize += itemSize
}
fmt.Print("\n[Summary]\n")
fmt.Println("Total Number of keys:", totalKeys)
fmt.Println("Total Size of key-value pairs:", totalSize)
return nil

}
Expand All @@ -209,7 +213,7 @@ func lookup(db *badger.DB) error {
}
fmt.Println()
item := itr.Item()
if err := printKey(item, true); err != nil {
if _, err := printKeyReturnSize(item, true); err != nil {
return y.Wrapf(err, "failed to print information about key: %x(%d)",
item.Key(), item.Version())
}
Expand All @@ -224,19 +228,20 @@ func lookup(db *badger.DB) error {
if !bytes.Equal(key, item.Key()) {
break
}
if err := printKey(item, true); err != nil {
if _, err := printKeyReturnSize(item, true); err != nil {
return y.Wrapf(err, "failed to print information about key: %x(%d)",
item.Key(), item.Version())
}
}
return nil
}

func printKey(item *badger.Item, showValue bool) error {
func printKeyReturnSize(item *badger.Item, showValue bool) (int64, error) {
var buf bytes.Buffer
fmt.Fprintf(&buf, "Key: %x\tversion: %d", item.Key(), item.Version())
size := item.EstimatedSize()
if opt.itemMeta {
fmt.Fprintf(&buf, "\tsize: %d\tmeta: b%04b", item.EstimatedSize(), item.UserMeta())
fmt.Fprintf(&buf, "\tsize: %d\tmeta: b%04b", size, item.UserMeta())
}
if item.IsDeletedOrExpired() {
buf.WriteString("\t{deleted}")
Expand All @@ -247,13 +252,13 @@ func printKey(item *badger.Item, showValue bool) error {
if showValue {
val, err := item.ValueCopy(nil)
if err != nil {
return y.Wrapf(err,
return size, y.Wrapf(err,
"failed to copy value of the key: %x(%d)", item.Key(), item.Version())
}
fmt.Fprintf(&buf, "\n\tvalue: %v", val)
}
fmt.Println(buf.String())
return nil
return size, nil
}

func hbytes(sz int64) string {
Expand Down
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