[jira] [Created] (HDDS-14428) [Website v2] [Docs] [Administrator Guide] Cluster expansion

["Wei-Chiu Chuang (Jira)" <ji...@apache.org>]

Wei-Chiu Chuang created HDDS-14428:
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             Summary: [Website v2] [Docs] [Administrator Guide] Cluster expansion
                 Key: HDDS-14428
                 URL: https://issues.apache.org/jira/browse/HDDS-14428
             Project: Apache Ozone
          Issue Type: Sub-task
          Components: documentation
            Reporter: Wei-Chiu Chuang


Administrator Guide -> Operations -> Cluster expansion

Context: Administrators wanting to expand the cluster capacity by adding new datanodes; or adding extra disks, memory and CPUs to existing cluster nodes.

 

Question: is it supported? Will these changes be automatically synchronized? What are the steps.

 

Answer: yes they are all supported.

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adding a new datanode involves initializing a Linux host, add configuration files, start the datanode 

{{ozone --daemon start datanode}}
(see: [https://ozone.apache.org/docs/edge/start/onprem.html)]

 

For performance considerations, administrators may wish to run Container Balancer to balance the node usage [https://ozone-site-v2.staged.apache.org/docs/administrator-guide/operations/data-balancing/container-balancer.]

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adding a new disk to an existing datanode requires: physically adding a disk; format and mount the disk in Linux; set up permissions of the directory; update datanode configuration hdds.datanode.dir to add the mount point to the dir list; restart the datanode.

 

For performance considerations, administrators may wish to run Diskbalancer to balance the traffic between the disks [https://ozone-site-v2.staged.apache.org/docs/administrator-guide/operations/data-balancing/disk-balancer]

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It shouldn't need any configuration to add memory, although if the administrator wishes to have the datanode to expand maximum heap size, update the environment variable 
OZONE_HEAPSIZE_MAX (or OZONE_DATANODE_OPTS) and then restart the datanode.



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