Devops is basically a culture, its neither a  set of tools  nor a persons profession. Its Basically the culture where the developer and the Operations team are willing to work togather  to provide a great customer experience. With the advent of SaaS tools and SaaS environment,  the development, testing deployment and ioperations are  no  longer isolated with long gaps and different periods. whatever is deployed in the SaaS env is availbale to the end user right away or near immidiately. Hence its increasingly imporatant that the issues are fixed asap and the primary focus shift to customer experience and shorter time to market.
 To achive higher degree of integration between the Dev and the Ops parts the team not only needs  better cohesion but a proper and better process for optimization as well as some specific tools for CI- Continious Integration  and CD- Continious Deployment. 
Devops teams may also include additional tools for log analysis and monitoring, and ticket tracking. Most Devops teams also use Agile Methodology to manage the current bugs.

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