From d3054e577a4fe115c0f418ee8706759cab8e8fd7 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <e.stratonikov@yadro.com>
Date: Sat, 10 Dec 2022 13:59:18 +0300
Subject: [PATCH] [#2165] services/tree: Allow to set custom synchronization
 interval

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
---
 cmd/frostfs-node/config/tree/config.go      |  8 ++++++
 cmd/frostfs-node/config/tree/config_test.go |  1 +
 cmd/frostfs-node/tree.go                    | 30 ++++++++++++++++-----
 config/example/node.env                     |  1 +
 config/example/node.json                    |  3 ++-
 config/example/node.yaml                    |  1 +
 6 files changed, 37 insertions(+), 7 deletions(-)

diff --git a/cmd/frostfs-node/config/tree/config.go b/cmd/frostfs-node/config/tree/config.go
index 63278587..7007bedf 100644
--- a/cmd/frostfs-node/config/tree/config.go
+++ b/cmd/frostfs-node/config/tree/config.go
@@ -63,3 +63,11 @@ func (c TreeConfig) ReplicationChannelCapacity() int {
 func (c TreeConfig) ReplicationWorkerCount() int {
 	return int(config.IntSafe(c.cfg, "replication_worker_count"))
 }
+
+// SyncInterval returns the value of "sync_interval"
+// config parameter from the "tree" section.
+//
+// Returns 0 if config value is not specified.
+func (c TreeConfig) SyncInterval() time.Duration {
+	return config.DurationSafe(c.cfg, "sync_interval")
+}
diff --git a/cmd/frostfs-node/config/tree/config_test.go b/cmd/frostfs-node/config/tree/config_test.go
index 4270213c..67015843 100644
--- a/cmd/frostfs-node/config/tree/config_test.go
+++ b/cmd/frostfs-node/config/tree/config_test.go
@@ -33,6 +33,7 @@ func TestTreeSection(t *testing.T) {
 		require.Equal(t, 32, treeSec.ReplicationChannelCapacity())
 		require.Equal(t, 32, treeSec.ReplicationWorkerCount())
 		require.Equal(t, 5*time.Second, treeSec.ReplicationTimeout())
+		require.Equal(t, time.Hour, treeSec.SyncInterval())
 	}
 
 	configtest.ForEachFileType(path, fileConfigTest)
diff --git a/cmd/frostfs-node/tree.go b/cmd/frostfs-node/tree.go
index fce00fd3..a271fc70 100644
--- a/cmd/frostfs-node/tree.go
+++ b/cmd/frostfs-node/tree.go
@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"errors"
+	"time"
 
 	treeconfig "github.com/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/tree"
 	"github.com/TrueCloudLab/frostfs-node/pkg/core/container"
@@ -63,12 +64,29 @@ func initTreeService(c *cfg) {
 		c.treeService.Start(ctx)
 	}))
 
-	addNewEpochNotificationHandler(c, func(_ event.Event) {
-		err := c.treeService.SynchronizeAll()
-		if err != nil {
-			c.log.Error("could not synchronize Tree Service", zap.Error(err))
-		}
-	})
+	if d := treeConfig.SyncInterval(); d == 0 {
+		addNewEpochNotificationHandler(c, func(_ event.Event) {
+			err := c.treeService.SynchronizeAll()
+			if err != nil {
+				c.log.Error("could not synchronize Tree Service", zap.Error(err))
+			}
+		})
+	} else {
+		go func() {
+			tick := time.NewTicker(d)
+			defer tick.Stop()
+
+			for range tick.C {
+				err := c.treeService.SynchronizeAll()
+				if err != nil {
+					c.log.Error("could not synchronize Tree Service", zap.Error(err))
+					if errors.Is(err, tree.ErrShuttingDown) {
+						return
+					}
+				}
+			}
+		}()
+	}
 
 	subscribeToContainerRemoval(c, func(e event.Event) {
 		ev := e.(containerEvent.DeleteSuccess)
diff --git a/config/example/node.env b/config/example/node.env
index 98186ef9..dc58d3d6 100644
--- a/config/example/node.env
+++ b/config/example/node.env
@@ -35,6 +35,7 @@ NEOFS_TREE_CACHE_SIZE=15
 NEOFS_TREE_REPLICATION_CHANNEL_CAPACITY=32
 NEOFS_TREE_REPLICATION_WORKER_COUNT=32
 NEOFS_TREE_REPLICATION_TIMEOUT=5s
+NEOFS_TREE_SYNC_INTERVAL=1h
 
 # gRPC section
 ## 0 server
diff --git a/config/example/node.json b/config/example/node.json
index e0fcc8ea..bd85e34b 100644
--- a/config/example/node.json
+++ b/config/example/node.json
@@ -80,7 +80,8 @@
     "cache_size": 15,
     "replication_channel_capacity": 32,
     "replication_worker_count": 32,
-    "replication_timeout": "5s"
+    "replication_timeout": "5s",
+    "sync_interval": "1h"
   },
   "control": {
     "authorized_keys": [
diff --git a/config/example/node.yaml b/config/example/node.yaml
index 89f24144..55f8bd4f 100644
--- a/config/example/node.yaml
+++ b/config/example/node.yaml
@@ -65,6 +65,7 @@ tree:
   replication_worker_count: 32
   replication_channel_capacity: 32
   replication_timeout: 5s
+  sync_interval: 1h
 
 control:
   authorized_keys:  # list of hex-encoded public keys that have rights to use the Control Service