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From A D <ask...@live.com>
Subject Re: How to do rolling upgrade of a hadoop cluster with hbase?
Date Mon, 18 Dec 2017 14:19:27 GMT
That is correct.

When you bring down a RM the other two will keep the cluster up and 
running and all the NMs will keep working with other two while the third 
one is being upgrade.


On 12/18/2017 09:17 AM, Debraj Manna wrote:
> Thanks AD.
>
> When you say one at a time it means I should upgrade a ResourceManager node
> and once it is fully upgraded and up, move to the next ResourceManager node?
>
> On Mon, Dec 18, 2017 at 7:41 PM, A D <askdba@live.com> wrote:
>
>> I strongly recommend following
>> http://hadoop.apache.org/docs/r2.6.5/hadoop-project-dist/hadoop-hdfs/
>> HdfsRollingUpgrade.html
>> for rolling upgrade.
>>
>> HBase is no different when it comes to rolling upgrade. There is no
>> special command that you need to execute. Below are the steps that I
>> would follow:
>>
>> 1. Upgrade the HDFS:
>>
>> Once HDFS upgrade is complete:
>>
>> 2. Upgrade ResourceManager nodes (one at a time).
>> 3. Upgrade NodeManagers(one at a time).
>>
>> Follow step 2 and 3 for HBase master and RegionServers. I would wait for
>> RIT to settle after shutting down a region server.
>>
>> Please refer to product documentation in case you are using a particular
>> distribution (Cloudera, MapR or Hortonworks).
>>
>>
>> On 12/18/2017 08:52 AM, Debraj Manna wrote:
>>> I am having a cluster like below
>>>
>>>
>>>      - 3 Hbase Master (1 Active & 2 standby)
>>>      - 4 Region Servers
>>>      - 4 Data Nodes
>>>      - 1 Primary & 1 Secondary Name Node
>>>      - 3 Journal Node
>>>      - 4 Nodemanager
>>>      - 3 Resource Manager (1 Active & 2 standby)
>>>
>>>
>>> Can someone let me know how can I plan a rolling upgrade of the above
>>> cluster with minimum downtime?
>>>
>>>
>>>      - Hadoop - 2.6.0
>>>      - Yarn - 2.6.0
>>>      - Hbase - 1.2.0
>>>
>>> Thanks,
>>>
>> --
>> Thank you,
>> A.D
>> askdba@live.com
>>
>>

-- 
Thank you,
A.D
askdba@live.com

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