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https://issues.apache.org/jira/browse/HDDS-2034?focusedWorklogId=316443&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-316443
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ASF GitHub Bot logged work on HDDS-2034:
----------------------------------------
Author: ASF GitHub Bot
Created on: 23/Sep/19 07:03
Start Date: 23/Sep/19 07:03
Worklog Time Spent: 10m
Work Description: ChenSammi commented on pull request #1469: HDDS-2034.
Async RATIS pipeline creation and destroy through heartbea…
URL: https://github.com/apache/hadoop/pull/1469#discussion_r326968982
##########
File path: hadoop-hdds/common/src/main/resources/ozone-default.xml
##########
@@ -1388,6 +1379,25 @@
</description>
</property>
+ <property>
+ <name>hdds.scm.safemode.pipeline.creation</name>
+ <value>true</value>
+ <tag>HDDS,SCM,OPERATION</tag>
+ <description>
+ Boolean value to enable background pipeline creation in SCM safe mode.
+ </description>
+ </property>
+
+ <property>
+ <name>hdds.scm.safemode.min.pipeline</name>
Review comment:
When a new cluster startup, it will exit safemode immediately currently.
Because there is pipeline to wait for it's report from datanode. So if we
don't add a min pipeline threshold, we will exit safemode without any pipeline
ready to use.
The desired state is when safenode off, Ozone should be ready for read/write
object.
Thant's the reason this property is added.
HDDS_SCM_SAFEMODE_HEALTHY_PIPELINE_THRESHOLD_PCT_DEFAULT cannot fulfill this
purpose, because the total pipeline number at the start of a new cluster is 0.
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Issue Time Tracking
-------------------
Worklog Id: (was: 316443)
Time Spent: 3h 10m (was: 3h)
> Async RATIS pipeline creation and destroy through heartbeat commands
> --------------------------------------------------------------------
>
> Key: HDDS-2034
> URL: https://issues.apache.org/jira/browse/HDDS-2034
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Reporter: Sammi Chen
> Assignee: Sammi Chen
> Priority: Major
> Labels: pull-request-available
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> Currently, pipeline creation and destroy are synchronous operations. SCM
> directly connect to each datanode of the pipeline through gRPC channel to
> create the pipeline to destroy the pipeline.
> This task is to remove the gRPC channel, send pipeline creation and destroy
> action through heartbeat command to each datanode.
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