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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