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What is Splunk?

In simple words Splunk is Google for  all your machine data /logs

-It's a powerful software/Engine which can be used to search,investigate, troubleshoot, monitor, visualize,alert, and report on everything that's happening in your entire IT infrastructure from one location in real time.

- You have to only enter the search keyword in search bar and done. Splunk will search logs of all machines/Servers /Network devices from your enterprise and will present  available info as result just like Google.

- you don't need to login to multiple servers and dig for all logs for particular event .Splunk will do it for you in smarter way.

- For example if you want to know particular users activity on all servers then you just need to enter username in searchbar and hit enter.Splunk will collect and display  all activities performed by user on all machines in few seconds
 
- You can even monitor your twitter feeds, gmail, mailbox  etc using splunk

-Splunk Enterprise takes valuable machine data and turns it into powerful operational intelligence by providing real time insight to your data through charts,alerts,reports etc
               
                                                                                  Splunk Overview

- Its a data mining tool for Big Data.Built in to handle Big/large data without affecting performance

- Splunk do not require any database like Oracle or MS SQL to store its data.It stores it's data in indexes.so no additional cost for DB

- It effectively reduces troubleshooting and resolving time by providing instant results.Splunk is your best friend for root cause analysis

- It can work as  monitoring tool,SIEM,reporting tool,analysys tool....and much more.....

- Its very easy to setup and expand.



Notable Splunk use cases:-

IT/Operations

• "MetroPCS, a leading North American telecoms operator, is using Splunk to index data from firewalls, intrusion detection systems and web servers to identify network abusers and take corrective action..."
  
• SaaS provider Ceryx uses Splunk to track and manage email flow issues.
• Denver Water's IT team uses Splunk to see failure trends and address them ahead of time.
  

Web Analytics

Splunk supports web analytics use cases.

Cars.com used Splunk to improve key performance metrics on its website so users would spend more time on their site, garnering greater profits.
Domino's Pizza uses Splunk to track and analyze coupon usage to determine efficacy of their online promotions.
"National Public Radio NPR is using the Splunk log search engine to analyze Web traffic for its audio streams and downloads.".

Internet of Things

A growing set of use cases exist for Splunk in the Internet of Things.

• Splunk was used to analyze open data made available through Bangkok's Metropolitan Administration Department of Drainage and Sewage. Using the Splunk architecture, a system was implemented that monitors and sends out alerts to subscribers of the system to alert them as water levels rise so that they can prepare and evacuate as necessary.
• Eglin Air Force Base uses Splunk to monitor usage of elevators, security doors, light switches, wall mounted thermostats, and air conditioners in its facilities and then analyzes the collected data to determine usage patterns and identify when energy usage can be moderated.
• Nest Labs, makers of the wifi-enabled Nest thermostat uses Splunk to analyze the thermostat data from hundreds of thousands of customers to improve device performance.
• Medical device manufacturer iRhythm uploads remote monitor data to Splunk to check on performance of its products.
  
• An unnamed elevator company uses Splunk to monitor its customers' elevator usage patterns and uses the information to decide whether to offer different plans to certain customers.
  

Security

Splunk is used for a variety of security purposes

• University of Connecticut uses Splunk to analyze security log data and generate a "security score" based on various security metrics including use of anti-virus and OS patch level, which is then used to advise and educate the users in question.
• Splunk is used by federal and state agencies to automate review and analysis of security and network log data so that security issues can be addressed quickly.
  

Compliance

Splunk is used to assist in developing and maintaining regulatory compliance

• Credit Suisse uses Splunk to monitor data coming from servers, databases, firewalls, etc.
• "Monster Worldwide, parent company of the popular Monster.com job website, has chosen Splunk software to manage security, monitoring and compliance efforts for its online hosting business..."
• Australian online bookmaker Sportsbet uses Splunk to generate reports for PCI auditors that can be used to assess compliance with the standards.
  

  
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