Programming With Rakib

In-memory Caches An in-memory cache removes the performance delays when an application built on a disk-based database must retrieve data from a disk before processing. Reading data from memory is faster than from the disk. In-memory caching avoids latency and improves online application performance. CDN A content delivery network (CDN) is a geographically distributed group of servers that caches content close to end users. A CDN allows for the quick transfer of assets needed for loading Internet content, including HTML pages, JavaScript files, stylesheets, images, and videos. Cache Invalidation Cache invalidation is the process of invalidating cache by removing data from a system’s cache when that data is no longer valid or useful. When a change is made to the original data, such as updating profile information, the corresponding cached files should be invalidated to ensure that the updated data is reflected. Write-through Cache Write-through is a storage method in which data is writte...

Master-Slave The master-slave is a database architecture divided into a master database and slave databases. The slave database serves as the backup for the master database. The master database is used for the write operations, while read operations may be spread on multiple slave databases. Peer-to-Peer Peer-to-peer replication provides a scale-out and high-availability solution by maintaining copies of data across multiple server instances, also referred to as nodes. Built on the foundation of transactional replication, peer-to-peer replication propagates transactionally consistent changes in near real-time Synchronous Synchronous replication ensures that when a disk IO operation is initiated by an application or the file system cache on the primary server, the system waits for IO acknowledgments from both the local disk and the secondary server before acknowledging the operation to the application or file system cache. This mechanism guarantees data consistency and is crucial for th...

  Data Backup Data backup is the practice of copying data from a primary to a secondary location, to protect it in case of equipment failure, cyberattack, natural disaster or other data loss events. This can include documents, media files, configuration files, machine images, operating systems, and registry files. Essentially, any data that we want to preserve can be stored as backup data. Data Restore Data restore is the process of copying backup data from secondary storage and restoring it to its original location or a new location. A restore is performed to return data that has been lost, stolen or damaged to its original condition or to move data to a new location. Pilot Light A pilot light approach minimizes the ongoing cost of disaster recovery by minimizing the active resources, and simplifies recovery at the time of a disaster because the core infrastructure requirements are all in place. Warm Standby The warm standby approach involves ensuring that there is a scaled down, ...