SPLK-2002: Splunk Enterprise Certified ArchitectDemo

The minimum Splunk indexer reference hardware baseline is 12 CPU cores, 12 GB RAM, and disk performance of at least 800 IOPS.

A Splunk job is a search execution process, including searches started by reports or alerts. Search jobs are subject to configured resource quotas, including concurrent-search and disk-usage limits, and execute as child OS processes of the splunkd daemon. A capability is a role permission rather than a search job.

Splunk Enterprise search head clustering uses the Raft distributed-consensus mechanism to maintain cluster metadata and support captain elections. A captain must receive a majority vote of cluster members. Handle Raft issues | Splunk Enterprise

Splunk user management requires selecting and configuring authentication methods, such as native authentication, LDAP, or SAML, and assigning roles whose capabilities define what users can access and do. The count of users represented in logged events does not determine how Splunk users are authenticated or authorized.

INDEXED_EXTRACTIONS and other structured-data header extraction settings are processed during Splunk’s structured parsing phase. The subsequent indexing phase writes the already parsed events and index files to disk.

Splunk maintains monitored-file checkpoint information in the forwarder-side fishbucket; removing that tracking state can disrupt file-monitoring continuity. File monitoring also relies on content checks to recognize updates, so an in-place change that leaves the file's trailing 256 bytes unchanged can be treated as having no new tail data to index. Cleaning an index does not prevent later forwarding, and an unchanged initial 256 bytes is expected for an existing monitored file.

All peer nodes in an indexer cluster must run exactly the same Splunk Enterprise version, including the maintenance level. The manager (master) node must run the same or a later version than peer nodes and search heads, while search heads must run the same or a later version than peer nodes.

Splunk Enterprise’s Configuration Change Tracker records creations, updates, and deletions of monitored .conf files in the _configtracker index.

Setting a search head’s site to site0 disables search site affinity, so it uses the site0 set of primary bucket copies, which normally spans all sites in the indexer cluster.

Search artifacts reside in the dispatch directory. Disabling the dispatch diag component excludes that directory and therefore prevents collection of search artifacts.

The valid [clustering] mode values include manager, peer, searchhead, and disabled. Therefore, manager, peer, and searchhead are valid listed values; deployer is not. See Splunk’s server.conf specification.

TailingProcessor handles monitored uncompressed log files, including tracking the read position and detecting appended data. Its splunkd.log messages are therefore relevant when newly added file content is not appearing in searches. Splunk documents that its tailing code handles uncompressed log files and that the file-monitoring process uses file identity and seek information to determine what has already been read.

In a distributed Splunk deployment, internal logs—including those generated by the license manager—should be sent to and retained in the indexing tier. This centralizes indexed data and prevents management components from maintaining local indexed data.

Changes to inputs.conf, including a monitor input, require a splunkd restart to become active. Forwarder Management provides a per-app Restart Splunkd post-deployment setting; if it is not enabled, the deployed monitor configuration is not activated. Existing events continuing to forward shows that the clients already have a working output path and reachable receiving port.

The Search Job Inspector’s key sections are Execution costs, which show the performance impact of search-processing components, and Search job properties, which list characteristics of the search job.

A Splunk Enterprise license specifies the daily volume of data that can be indexed. Its default Enterprise license pool is available to any connected license peer, so leaving the default pool at 900 GB/day provides sufficient shared capacity for 600 GB/day of ingestion without unnecessary per-indexer pool allocations.

site_search_factor defines the placement and total count of searchable bucket copies in a multisite indexer cluster. origin:2 requires two searchable copies at the data’s origin site, site2:1 requires one at site2, and total:4 requires four searchable copies across the cluster. Configure the site search factor

Inverted index (.tsidx) files store the indexed terms that point to events and can occupy a substantial share of a bucket’s storage. Splunk estimates TSIDX files at roughly 35% of the pre-indexed data volume, compared with roughly 15% for compressed rawdata; bloom filters and metadata are small supporting files.

Masking event content before it is forwarded requires parsing and event-level transformation. A Heavy Forwarder can parse and transform events before forwarding; a Universal Forwarder generally forwards unparsed data and cannot perform that event-level masking.

For Splunk transaction results, closed_txn=0 identifies a transaction that was not closed by its defined closing condition. With startswith="My GUID" and the normal completion event represented by "pipelines finished", this retains evidence of a Splunk start that did not complete with a normal stop event. Splunk transaction command reference

A deployment plan requires documented use cases, an inventory of the data sources to be ingested, and an assessment of network topology so that the architecture, component placement, data flow, and capacity can be designed. Installing Splunk apps is a deployment/configuration step rather than a planning activity.

Captaincy can be transferred through the Search Head Clustering dashboard in Splunk Web. The splunk transfer shcluster-captain command can run from any cluster member, including the current captain or the member that is to become captain. The Monitoring Console is used to view cluster status and troubleshoot issues rather than to transfer captaincy.

RAID 10 (1+0) combines mirrored disks with striping, delivering both fault tolerance and strong read/write throughput for the I/O-intensive indexing workload. Splunk requires fast local storage for hot and warm buckets and specifically advises against hosting them on NFS; SAN storage remains an option for cold or frozen storage.

Knowledge-bundle replication can use either a delta bundle or a full bundle. A .bundle file is the full knowledge bundle, so full .bundle replication is the fallback when delta replication cannot be used.