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AWS Database Services

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AWS Lambda Integration with Amazon DynamoDB Streams

2021-05-03T13:23:37+00:00

Amazon DynamoDB is integrated with AWS Lambda so that you can create triggers, which are pieces of code that automatically respond to events in DynamoDB Streams. With triggers, you can build applications that react to data modifications in DynamoDB tables. After you enable DynamoDB Streams on a table, associate the DynamoDB table with a Lambda function. AWS Lambda polls the stream and invokes your Lambda function synchronously when it detects new stream records.  Configure the StreamSpecification you want for your DynamoDB Streams: StreamEnabled (Boolean) - indicates whether DynamoDB Streams is enabled (true) or disabled (false) on the table. StreamViewType (string) [...]

AWS Lambda Integration with Amazon DynamoDB Streams2021-05-03T13:23:37+00:00

DynamoDB Scan vs Query

2023-01-30T13:33:00+00:00

Scan The Scan operation returns one or more items and item attributes by accessing every item in a table or a secondary index. The total number of scanned items has a maximum size limit of 1 MB. Scan operations proceed sequentially; however, for faster performance on a large table or secondary index, applications can request a parallel Scan operation. Scan uses eventually consistent reads when accessing the data in a table; therefore, the result set might not include the changes to data in the table immediately before the operation began. If you need a consistent copy of the data, as [...]

DynamoDB Scan vs Query2023-01-30T13:33:00+00:00

Redis (cluster mode enabled vs disabled) vs Memcached

2023-04-10T05:29:45+00:00

  Redis (cluster mode enabled) Redis (cluster mode disabled) Memcached Data Types string, sets, sorted sets, lists, hashes, bitmaps, hyperloglog, geospatial indexes string, sets, sorted sets, lists, hashes, bitmaps, hyperloglog, geospatial indexes string, objects (like databases) Data Partitioning (distribute your data among multiple nodes) Supported Unsupported Supported Modifiable cluster Only versions 3.2.10 and later  Yes Yes Online resharding Only versions 3.2.10 and later  No No Encryption 3.2.6, 4.0.10 and later 3.2.6, 4.0.10 and later Unsupported Sub-millisecond latency Yes Yes Yes FedRAMP, PCI DSS and HIPAA compliant 3.2.6, 4.0.10 and later 3.2.6, 4.0.10 and later No Multi-threaded (make use of multiple [...]

Redis (cluster mode enabled vs disabled) vs Memcached2023-04-10T05:29:45+00:00

Redis Append-Only Files vs Redis Replication

2023-04-10T05:21:12+00:00

Redis Append-Only Files (AOF) Redis Replication You can enable the Redis append-only file feature (AOF) for data durability. It is similar to creating manual backups. When enabled, the node writes all of the commands that change cache data to an append-only file.  When a node is rebooted and the cache engine starts, Redis goes through an AOF to replay the actions that were performed before the crash; the result is a warm Redis cache with all of the data intact. To enable AOF for a cluster running Redis, you must create a parameter group with the appendonly parameter set to [...]

Redis Append-Only Files vs Redis Replication2023-04-10T05:21:12+00:00

Amazon ElastiCache

2024-11-14T09:14:52+00:00

Bookmarks Components ElastiCache Memchached Caching Strategies Scaling ElastiCache for Memcached Clusters Monitoring Redis vs Memcached Pricing Amazon ElastiCache-related Cheat Sheets Validate Your Knowledge Amazon ElastiCache Cheat Sheet ElastiCache is a distributed in-memory cache environment in the AWS Cloud. ElastiCache works with both the Redis and Memcached engines. Components ElastiCache Nodes A node is a fixed-size chunk of secure, network-attached RAM. A node can exist in isolation from or in some relationship to other nodes. Every node within a cluster is the same instance type and runs the same cache [...]

Amazon ElastiCache2024-11-14T09:14:52+00:00

Amazon Aurora

2024-11-14T09:22:45+00:00

Bookmarks DB Clusters Aurora Endpoints Storage and Reliability High Availability Fault Tolerance Aurora Global Database DB Cluster Configurations Tags Monitoring Security Pricing Deep Drive on Amazon Aurora Validate Your Knowledge Amazon Aurora Cheat Sheet A fully managed relational database engine that's compatible with MySQL and PostgreSQL. With some workloads, Aurora can deliver up to five times the throughput of MySQL and up to three times the throughput of PostgreSQL. Aurora includes a high-performance storage subsystem. The underlying storage grows automatically as needed, up to 128 [...]

Amazon Aurora2024-11-14T09:22:45+00:00

Amazon Relational Database Service ( Amazon RDS )

2024-11-14T09:19:50+00:00

Bookmarks DB Engines DB Instance RDS Storage Auto Scaling Security Tagging High Availability Using Multi-AZ Read Replicas Backups and Restores Monitoring RDS Proxy Pricing Best Practices Amazon RDS-related Cheat Sheets Validate Your Knowledge Amazon RDS Cheat Sheet Industry-standard relational database RDS manages backups, software patching, automatic failure detection, and recovery. You can have automated backups performed when you need them, or manually create your own backup snapshot. You can use these backups to restore a database. Supports Aurora, MySQL, MariaDB, PostgreSQL, Oracle, Microsoft SQL [...]

Amazon Relational Database Service ( Amazon RDS )2024-11-14T09:19:50+00:00

Amazon DynamoDB

2024-11-14T09:12:13+00:00

Bookmarks Core Components Data Types For Attributes Other Notes Throughout Management Capacity Unit Consumption DynamoDB Auto Scaling DynamoDB Items Tagging DynamoDB Queries DynamoDB Scans On Demand Backup and Restore DynamoDB Transactions Global Tables Security Monitoring DynamoDB Accelerator (DAX) Best Practices Pricing DynamoDB-Related Cheat Sheets Validate Your Knowledge Amazon DynamoDB Cheat Sheet NoSQL database service that provides fast and predictable performance with seamless scalability. Offers encryption at rest. You can create database tables that can store and retrieve [...]

Amazon DynamoDB2024-11-14T09:12:13+00:00

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