---
title: Recon server v2
summary: Second phase of Recon development. Recon acts as a passive SCM.
date: 2019-08-19
jira: HDDS-1996
status: implemented
author: Aravindan Vijayan, Vivek Ratnavel Subramanian, Sid Wagle
---
<!--
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License. See accompanying LICENSE file.
-->

# Abstract

 The second phase of Recon development. The biggest change is that Recon can act as a passive SCM, collect HB from Datanode and analyze the data.
 
# Link

 * https://issues.apache.org/jira/secure/attachment/12986596/Recon%20v0.2.pdf
