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Within the [clustering] stanza of the server.conf file, the mode attribute defines the functional role of a Splunk instance within an indexer cluster. Splunk documentation identifies three valid modes:

mode = manager

Defines the node as the Cluster Manager (formerly called the Master Node).

Responsible for coordinating peer replication, managing configurations, and ensuring data integrity across indexers.

mode = peer

Defines the node as an Indexer (Peer Node) within the cluster.

Handles data ingestion, replication, and search operations under the control of the manager node.

mode = searchhead

Defines a Search Head that connects to the cluster for distributed searching and data retrieval.

The value “deployer” (Option C) is not valid within the [clustering] stanza; it applies to Search Head Clustering (SHC) configurations, where it is defined separately in server.conf under [shclustering].

Each mode must be accompanied by other critical attributes such as manager_uri, replication_port, and pass4SymmKey to enable proper communication and security between cluster members.

References (Splunk Enterprise Documentation):

• Indexer Clustering: Configure Manager, Peer, and Search Head Modes

• server.conf Reference – [clustering] Stanza Attributes

• Distributed Search and Cluster Node Role Configuration

• Splunk Enterprise Admin Manual – Cluster Deployment Architecture

KV Store is a feature of Splunk Enterprise that allows apps to store and retrieve data within the context of an app1.

KV Store resides on search heads and replicates data across the members of a search head cluster1.

KV Store resiliency refers to the ability of KV Store to maintain data availability and consistency in the event of failures or disruptions2.

One of the factors that affects KV Store resiliency is the network latency between search heads, which can impact the speed and reliability of data replication2.

Decreasing latency between search heads can improve KV Store resiliency by reducing the chances of data loss, inconsistency, or corruption2.

The other options are not directly related to KV Store resiliency. Faster storage, indexer CPU and memory, and Operations Log size may affect other aspects of Splunk performance, but not KV Store345.

 ITSI can impact the planning of a Splunk deployment depending on the Key Performance Indicators (KPIs) that are being tracked. KPIs are metrics that measure the health and performance of IT services and business processes. ITSI collects, analyzes, and displays KPI data from various data sources in Splunk. Depending on the number, frequency, and complexity of the KPIs, additional infrastructure may be needed to support the data ingestion, processing, and visualization. ITSI does not require a dedicated deployment server, nor does it affect the number of users using ITSI. ITSI in a Splunk deployment does require additional hardware resources, such as CPU, memory, and disk space, to run the ITSI components and apps

Setting site=site0 on all Search Head Cluster members disables search site affinity. Search site affinity is a feature that allows search heads to preferentially search the peer nodes that are in the same site as the search head, to reduce network latency and bandwidth consumption. By setting site=site0, which is a special value that indicates no site, the search heads will search all peer nodes regardless of their site. Setting site=site0 does not set all members to dynamic captaincy, enable multisite search artifact replication, or enable automatic search site affinity discovery. Dynamic captaincy is a feature that allows any member to become the captain, and it is enabled by default. Multisite search artifact replication is a feature that allows search artifacts to be replicated across sites, and it is enabled by setting site_replication_factor to a value greater than 1. Automatic search site affinity discovery is a feature that allows search heads to automatically determine their site based on the network latency to the peer nodes, and it is enabled by setting site=auto