diff --git a/Async-Replication-to-another-Filer.md b/Async-Replication-to-another-Filer.md
index ca411f8..84c41bd 100644
--- a/Async-Replication-to-another-Filer.md
+++ b/Async-Replication-to-another-Filer.md
@@ -11,14 +11,47 @@ There should be two Seaweed File Systems running, possibly across data centers.
 
 ```
 [notification.log]
+# this is only for debugging perpose and does not work with "weed filer.replicate"
 enabled = false
 
+
 [notification.kafka]
-enabled = true
+enabled = false
 hosts = [
   "localhost:9092"
 ]
-topic = "seaweedfs_filer1_to_filer2"
+topic = "seaweedfs_filer"
+offsetFile = "./last.offset"
+offsetSaveIntervalSeconds = 10
+
+
+[notification.aws_sqs]
+# experimental, let me know if it works
+enabled = false
+aws_access_key_id     = ""        # if empty, loads from the shared credentials file (~/.aws/credentials).
+aws_secret_access_key = ""        # if empty, loads from the shared credentials file (~/.aws/credentials).
+region = "us-east-2"
+sqs_queue_name = "my_filer_queue" # an existing queue name
+
+
+[notification.google_pub_sub]
+# read credentials doc at https://cloud.google.com/docs/authentication/getting-started
+enabled = false
+google_application_credentials = "/path/to/x.json" # path to json credential file
+project_id = ""                       # an existing project id
+topic = "seaweedfs_filer_topic"       # a topic, auto created if does not exists
+
+[notification.gocdk_pub_sub]
+# The Go Cloud Development Kit (https://gocloud.dev).
+# PubSub API (https://godoc.org/gocloud.dev/pubsub).
+# Supports AWS SNS/SQS, Azure Service Bus, Google PubSub, NATS and RabbitMQ.
+enabled = false
+# This URL will Dial the RabbitMQ server at the URL in the environment
+# variable RABBIT_SERVER_URL and open the exchange "myexchange".
+# The exchange must have already been created by some other means, like
+# the RabbitMQ management plugin.
+topic_url = "rabbit://myexchange"
+sub_url = "rabbit://myqueue"
 
 ```
 
@@ -47,6 +80,39 @@ replication = ""
 collection = ""
 ttlSec = 0
 
+[sink.s3]
+# read credentials doc at https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/sessions.html
+# default loads credentials from the shared credentials file (~/.aws/credentials).
+enabled = false
+aws_access_key_id     = ""     # if empty, loads from the shared credentials file (~/.aws/credentials).
+aws_secret_access_key = ""     # if empty, loads from the shared credentials file (~/.aws/credentials).
+region = "us-east-2"
+bucket = "your_bucket_name"    # an existing bucket
+directory = "/"                # destination directory
+endpoint = ""
+
+[sink.google_cloud_storage]
+# read credentials doc at https://cloud.google.com/docs/authentication/getting-started
+enabled = false
+google_application_credentials = "/path/to/x.json" # path to json credential file
+bucket = "your_bucket_seaweedfs"    # an existing bucket
+directory = "/"                     # destination directory
+
+[sink.azure]
+# experimental, let me know if it works
+enabled = false
+account_name = ""
+account_key  = ""
+container = "mycontainer"      # an existing container
+directory = "/"                # destination directory
+
+[sink.backblaze]
+enabled = false
+b2_account_id = ""
+b2_master_application_key  = ""
+bucket = "mybucket"            # an existing bucket
+directory = "/"                # destination directory
+
 ```
 
 Please read the source.filer and sink.filer configurations carefully and make sure you fully understand its intention. This is actually using one filer and replicate files from one folder to another folder.