Apache Cassandra
Apache Cassandra Apache Cassandra is an open source, freely distributed, high-performance, extremely scalable, and fault-tolerant post relational database
Apache Spark
Apache Spark
Apache Spark is a powerful open source processing engine and general MapReduce like engine used for large-scale data processing.
Apache Ambari
Apache Ambari
Apache Ambari is a completely open operational tool or framework for provisioning, managing, and monitoring Apache Hadoop clusters.
Loadrunner components
Loadrunner components
Vuser generator – used for generating Scripts
Controller – used for creating and executing scenarios
Analyzer – used for analyzing results
Vuser-init
Vuser-init
Functions in recording the pre-operations or initialization operations before the actual application is run.
Whats is Monitors in Loadrunner
Whats is Monitors in Loadrunner
Monitors Functions to monitor the performance bottlenecks. Controller section shows the monitor
What is Rendezvous point with reference to performance testing
What is Rendezvous point with reference to performance testing
Rendezvous point is Synchronization or Wait point. Rendezvous points makes Vusers to wait during test execution and multiple Vusers will simultaneously perform a task.
Why Rendezvous point is used ?
Rendezvous is mainly used to emulate heavy load on a particular scenario/ transaction to test the application behavior.
What is Correlation
What is Correlation
Correlation is used to manage dynamic values like session ids which cause failure during script playback. Correlation makes sure dynamic values are not hardcoded.
Note1 : In loadrunner Manual Correlation uses a function named Web_reg_save_param() in code to handle the issue.
Note2 : In Jmeter Regular expression extractor is used to handle this where server response will be parsed by Regular expression extractor
What is Distributed systems(Software)
What is Distributed systems(Software)
Distributed systems(Software) – Distributed systems is a number of independent computers linked by a network.
Web server vs Application server vs Database server
Web server vs Application server vs Database server
Web server serves a web content (HTML and static content) over the HTTP protocol.
Application server is a container on which one can build and expose business logic and processes to client applications through various protocols like HTTP. Some cases it will have internal web server. Application server is heavy in terms of resource usage.
Database server refers to the back-end system of a database application using client/server architecture. The database server performs tasks such as data analysis, storage, data manipulation, archiving, and other non-user specific tasks
Apache vs NGINXÂ
Both Apache and NGINX are web servers and used to serve the page contents back to users. NGINX has more efficiency in terms response especially when it comes to larger set of static pages. NGINX caching makes the contents ready available to user’s browser without going back to server to process the requsts from scratch.
Please search following topics in the search option of the site