On the Fusioninsight Manager interface, when a Kafka disk capacity alarm is received and the cause of the alarm has been ruled out as a hard disk hardware failure, the system administrator needs to consider expanding the capacity to resolve this issue.

When a Kafka disk capacity alarm is triggered on the FusionInsight Manager platform and a hardware failure has been ruled out, it signifies that the storage space allocated to the Kafka brokers is insufficient for the current data load and retention policies. The primary reasons for this are typically an increase in data ingestion volume or a long data retention period. In this scenario, one of the fundamental solutions is to increase the physical storage capacity of the nodes. Therefore, it is a standard and necessary procedure for a system administrator to consider capacity expansion to resolve the issue and ensure the stability and reliability of the Kafka service.

This is a "TRUE OR FALSE" question, so there is only one alternative. Stating the proposition is "False" would be incorrect. Ignoring the need for potential capacity expansion when disks are legitimately filling up would lead to service disruption. While other actions, such as adjusting data retention policies (log.retention.ms) or cleaning up old data, are also valid considerations, planning for or executing a capacity expansion is a primary and often necessary solution, especially when data retention requirements cannot be changed.

1. Huawei FusionInsight HD 6.5.1 Administrator Guide: In the section on "O&M > Alarm Reference," alarms related to disk capacity (e.g., "Disk Usage Exceeds the Threshold") are detailed. The recommended handling procedures consistently include checking service data volume and, if necessary, "expanding the cluster capacity." This confirms that capacity expansion is an official, recommended course of action. (Refer to sections on Alarm Handling and Capacity Management).

2. Huawei FusionInsight MRS 3.1.0 O&M Guide: The troubleshooting section for Kafka often addresses disk space issues. The guide outlines steps to identify the cause, such as checking topic retention settings. If the data volume is legitimate and required by business needs, the guide directs administrators to the "Cluster Expansion and Reduction" chapter, indicating that adding nodes or disks is the appropriate solution. (Refer to Chapter: "Troubleshooting," Section: "Kafka Troubleshooting," subsection on disk space alarms).

3. Huawei FusionInsight HD Product Documentation - Capacity Planning: Official capacity planning guides for FusionInsight explicitly state that Kafka's disk space requirements are a function of message throughput, retention period, and replication factor. When an alarm indicates that the provisioned capacity is exhausted, it directly implies that the initial planning is no longer sufficient, and re-evaluation leading to expansion is required. (Refer to the "Kafka Service" section within the Capacity Planning Guide).