Add badger2 profile and config spec

init.go

@@ -142,6 +142,19 @@ func badgerSpec() map[string]interface{} {
 	}
 }
 
+func badger2Spec() map[string]interface{} {
+	return map[string]interface{}{
+		"type":   "measure",
+		"prefix": "badger2.datastore",
+		"child": map[string]interface{}{
+			"type":       "badger2ds",
+			"path":       "badger2ds",
+			"syncWrites": false,
+			"truncate":   true,
+		},
+	}
+}
+
 func flatfsSpec() map[string]interface{} {
 	return map[string]interface{}{
 		"type": "mount",

profile.go

@@ -130,7 +130,7 @@ This profile may only be applied when first initializing the node.
 This is the most battle-tested and reliable datastore, but it's significantly
 slower than the badger datastore. You should use this datastore if:
 
-* You need a very simple and very reliable datastore you and trust your
+* You need a very simple and very reliable datastore and you trust your
   filesystem. This datastore stores each block as a separate file in the
   underlying filesystem so it's unlikely to loose data unless there's an issue
   with the underlying file system.
@@ -152,7 +152,7 @@ This profile may only be applied when first initializing the node.
 	"badgerds": {
 		Description: `Configures the node to use the badger datastore.
 
-This is the fastest datastore. Use this datastore if performance, especially
+This is a fast datastore. Use this datastore if performance, especially
 when adding many gigabytes of files, is critical. However:
 
 * This datastore will not properly reclaim space when your datastore is
@@ -170,6 +170,27 @@ This profile may only be applied when first initializing the node.`,
 			return nil
 		},
 	},
+	"badger2ds": {
+		Description: `Configures the node to use the badger2 datastore.
+
+This is the fastest datastore. Use this datastore if performance, especially
+when adding many gigabytes of files, is critical. However:
+
+* This datastore will not properly reclaim space when your datastore is
+  smaller than several gigabytes. If you run IPFS with '--enable-gc' (you have
+  enabled block-level garbage collection), you plan on storing very little data in
+  your IPFS node, and disk usage is more critical than performance, consider using
+  flatfs.
+* This datastore uses up to several gigabytes of memory. 
+
+This profile may only be applied when first initializing the node.`,
+
+		InitOnly: true,
+		Transform: func(c *Config) error {
+			c.Datastore.Spec = badger2Spec()
+			return nil
+		},
+	},
 	"lowpower": {
 		Description: `Reduces daemon overhead on the system. May affect node
 functionality - performance of content discovery and data