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https://issues.apache.org/jira/browse/HDDS-14428?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chenchen Lai reassigned HDDS-14428:
-----------------------------------
Assignee: Chenchen Lai
> [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
> Assignee: Chenchen Lai
> Priority: Major
>
> 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.
> ---
> 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.]
> ---
> 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]
> ---
> 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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