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From Debraj Manna <subharaj.ma...@gmail.com>
Subject Re: How to do rolling upgrade of a hadoop cluster with hbase?
Date Mon, 18 Dec 2017 14:22:37 GMT
Thanks again.

I will try the steps you suggested. I will get back if I have any other
doubts.

On Mon, Dec 18, 2017 at 7:49 PM, A D <askdba@live.com> wrote:

> 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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