Splunk is a software/Engine which can be used for searching, visualizing, Monitoring, reporting etc. of your enterprise data. Splunk takes machine data as input and turns it into powerful operational intelligence by providing real time insight to your data through charts, alerts, reports etc. It is among the powerful tools to handle excess amount of data there are a number of Splunk certifications you could take and reach higher in your career goals. Here are some interview questions and answers for professionals who have taken Splunk certification.
- What are the components of Splunk architecture?
There are four components in the Splunk architecture. They are:
Indexer: Indexes machine data
Deployment server: Manages the Splunk components in distributed environment
Search head: Provides GUI for searching
Forwarder: Forwards logs to indexer
- What is the difference between stats and transaction commands?
The transaction command is useful in two areas. Two transactions are not identified by unique id anymore. In this case, the identifier is re-used to identify web sessions. Here, time span or pauses are used to divide data into transactions. In cases when an identifier is used again, a specific message may identify the beginning or end of a transaction. Usually, stats command is used in a distributed search environment as it performs better. If a unique id is the identifier, stats can be used.
- What are Buckets and Splunk Bucket Lifecycle?
Splunk data has to follow a flow once it gets old so they stores indexed data in different directories. These directories are termed as buckets. Which contains events of a certain period. The Lifecycle of a bucket is shown below.
Hot: This contains newly indexed data and is open for writing. Each index has one or more hot buckets.
Warm: This contains data rolled from hot. There are a number of warm buckets.
Cold: This contains data rolled from warm. There are several cold buckets.
Frozen: This contains data rolled from cold. The frozen data is deleted by the indexer by default but, it can be archived. Such data can be thawed later.
- How can you troubleshoot Splunk performance issues?
There are three ways of doing this.
- Check for errors in splunkd.log
- Check server performance issues
- Install Splunk on Splunk app and check for errors and warnings in the dashboard
- How do you reset Splunk Admin Password?
To reset the admin password, log in to the server on which Splunk is installed and rename the password file and then restart Splunk. After doing this, you can log in using default username: admin password: changeme.
- What do you mean by Sourcetype in Splunk?
Sourcetype is the way by which Splunk identifies data.
- What is the difference between search head pooling and search head clustering?
These are features provided in Splunk for the availability of Splunk search head in situations when any one search head goes down. In the upcoming versions of Splunk, search head pooling will be replaced by the newly introduced search head cluster which is managed by captain. Search head cluster is thought to be more efficient and reliable than search head pooling.
Doing Splunk certifications have many benefits especially, to grab better job opportunities. So, when you are preparing for the exam, remember to take proper Splunk training that will help improve the scores.