From 01ce9b5c44fa531fd6e81e7c93ada3daaea64552 Mon Sep 17 00:00:00 2001
From: vyzo <vyzo@hackzen.org>
Date: Thu, 11 Mar 2021 11:45:05 +0200
Subject: [PATCH] add Compact to badger blockstore

---
 blockstore/badger/blockstore.go | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/blockstore/badger/blockstore.go b/blockstore/badger/blockstore.go
index 2c00f4240..7c1615711 100644
--- a/blockstore/badger/blockstore.go
+++ b/blockstore/badger/blockstore.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"runtime"
 	"sync/atomic"
 
 	"github.com/dgraph-io/badger/v2"
@@ -150,6 +151,20 @@ func (b *Blockstore) CollectGarbage() error {
 	return err
 }
 
+// Compact runs a synchronous compaction
+func (b *Blockstore) Compact() error {
+	if atomic.LoadInt64(&b.state) != stateOpen {
+		return ErrBlockstoreClosed
+	}
+
+	nworkers := runtime.NumCPU() / 2
+	if nworkers < 2 {
+		nworkers = 2
+	}
+
+	return b.DB.Flatten(nworkers)
+}
+
 // View implements blockstore.Viewer, which leverages zero-copy read-only
 // access to values.
 func (b *Blockstore) View(cid cid.Cid, fn func([]byte) error) error {