Several critical searches that were functioning correctly yesterday are not finding a lookup table today. Which log file would be the best place to start troubleshooting?
A. btool.log
B. web_access.log
C. health.log
D. configuration_change.log
Explanation:
A lookup table is a file that contains a list of values that can be used to enrich or modify the
data during search time1. Lookup tables can be stored in CSV files or in the KV Store1.
Troubleshooting lookup tables involves identifying and resolving issues that prevent the
lookup tables from being accessed, updated, or applied correctly by the Splunk searches.
Some of the tools and methods that can help with troubleshooting lookup tables are:
web_access.log: This is a file that contains information about the HTTP requests
and responses that occur between the Splunk web server and the clients2. This
file can help troubleshoot issues related to lookup table permissions, availability,
and errors, such as 404 Not Found, 403 Forbidden, or 500 Internal Server Error34.
btool output: This is a command-line tool that displays the effective configuration
settings for a given Splunk component, such as inputs, outputs, indexes, props,
and so on5. This tool can help troubleshoot issues related to lookup table
definitions, locations, and precedence, as well as identify the source of a
configuration setting6.
search.log: This is a file that contains detailed information about the execution of a
search, such as the search pipeline, the search commands, the search results, the
search errors, and the search performance. This file can help troubleshoot issues
related to lookup table commands, arguments, fields, and outputs, such as lookup,
inputlookup, outputlookup, lookup_editor, and so on.
Option B is the correct answer because web_access.log is the best place to start
troubleshooting lookup table issues, as it can provide the most relevant and immediate
information about the lookup table access and status. Option A is incorrect because btool
output is not a log file, but a command-line tool. Option C is incorrect because health.log is
a file that contains information about the health of the Splunk components, such as the
indexer cluster, the search head cluster, the license master, and the deployment server.
This file can help troubleshoot issues related to Splunk deployment health, but not
necessarily related to lookup tables. Option D is incorrect because
configuration_change.log is a file that contains information about the changes made to the
Splunk configuration files, such as the user, the time, the file, and the action. This file can
help troubleshoot issues related to Splunk configuration changes, but not necessarily
related to lookup tables.
On search head cluster members, where in $splunk_home does the Splunk Deployer deploy app content by default?
A. etc/apps/
B. etc/slave-apps/
C. etc/shcluster/
D. etc/deploy-apps/
Explanation:
According to the Splunk documentation1, the Splunk Deployer deploys app content to the
etc/slave-apps/ directory on the search head cluster members by default. This directory
contains the apps that the deployer distributes to the members as part of the configuration
bundle. The other options are false because:
A Splunk environment collecting 10 TB of data per day has 50 indexers and 5 search heads. A single-site indexer cluster will be implemented. Which of the following is a best practice for added data resiliency?
A. Set the Replication Factor to 49.
B. Set the Replication Factor based on allowed indexer failure.
C. Always use the default Replication Factor of 3.
D. Set the Replication Factor based on allowed search head failure.
Explanation:
The correct answer is B. Set the Replication Factor based on allowed indexer failure. This
is a best practice for adding data resiliency to a single-site indexer cluster, as it ensures
that there are enough copies of each bucket to survive the loss of one or more indexers
without affecting the searchability of the data1. The Replication Factor is the number of
copies of each bucket that the cluster maintains across the set of peer nodes2. The
Replication Factor should be set according to the number of indexers that can fail without
compromising the cluster’s ability to serve data1. For example, if the cluster can tolerate
the loss of two indexers, the Replication Factor should be set to three1.
The other options are not best practices for adding data resiliency. Option A, setting the
Replication Factor to 49, is not recommended, as it would create too many copies of each
bucket and consume excessive disk space and network bandwidth1. Option C, always
using the default Replication Factor of 3, is not optimal, as it may not match the customer’s
requirements and expectations for data availability and performance1. Option D, setting the
Replication Factor based on allowed search head failure, is not relevant, as the Replication
Factor does not affect the search head availability, but the searchability of the data on the
indexers1. Therefore, option B is the correct answer, and options A, C, and D are incorrect.
Which Splunk log file would be the least helpful in troubleshooting a crash?
A. splunk_instrumentation.log
B. splunkd_stderr.log
C. crash-2022-05-13-ll:42:57.1og
D. splunkd.log
Explanation: The splunk_instrumentation.log file is the least helpful in troubleshooting a crash, because it contains information about the Splunk Instrumentation feature, which collects and sends usage data to Splunk Inc. for product improvement purposes. This file does not contain any information about the Splunk processes, errors, or crashes. The other options are more helpful in troubleshooting a crash, because they contain relevant information about the Splunk daemon, the standard error output, and the crash report.
Which of the following is true regarding Splunk Enterprise's performance? (Select all that apply.)
A. Adding search peers increases the maximum size of search results.
B. Adding RAM to existing search heads provides additional search capacity.
C. Adding search peers increases the search throughput as the search load increases.
D. Adding search heads provides additional CPU cores to run more concurrent searches.
Explanation: The following statements are true regarding Splunk Enterprise performance:
Adding search peers increases the search throughput as search load increases.
This is because adding more search peers distributes the search workload across
more indexers, which reduces the load on each indexer and improves the search
speed and concurrency.
Adding search heads provides additional CPU cores to run more concurrent
searches. This is because adding more search heads increases the number of
search processes that can run in parallel, which improves the search performance
and scalability. The following statements are false regarding Splunk Enterprise
performance:
Adding search peers does not increase the maximum size of search results. The
maximum size of search results is determined by the maxresultrows setting in the
limits.conf file, which is independent of the number of search peers.
Adding RAM to an existing search head does not provide additional search
capacity. The search capacity of a search head is determined by the number of
CPU cores, not the amount of RAM. Adding RAM to a search head may improve
the search performance, but not the search capacity. For more information,
see Splunk Enterprise performance in the Splunk documentation.
A Splunk deployment is being architected and the customer will be using Splunk Enterprise Security (ES) and Splunk IT Service Intelligence (ITSI). Through data onboarding and sizing, it is determined that over 200 discrete KPIs will be tracked by ITSI and 1TB of data per day by ES. What topology ensures a scalable and performant deployment?
A. Two search heads, one for ITSI and one for ES.
B. Two search head clusters, one for ITSI and one for ES.
C. One search head cluster with both ITSI and ES installed.
D. One search head with both ITSI and ES installed.
Explanation: The correct topology to ensure a scalable and performant deployment for the customer’s use case is two search head clusters, one for ITSI and one for ES. This configuration provides high availability, load balancing, and isolation for each Splunk app. According to the Splunk documentation1, ITSI and ES should not be installed on the same search head or search head cluster, as they have different requirements and may interfere with each other. Having two separate search head clusters allows each app to have its own dedicated resources and configuration, and avoids potential conflicts and performance issues1. The other options are not recommended, as they either have only one search head or search head cluster, which reduces the availability and scalability of the deployment, or they have both ITSI and ES installed on the same search head or search head cluster, which violates the best practices and may cause problems. Therefore, option B is the correct answer, and options A, C, and D are incorrect.
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