Zhentiw - 博客园

2021年5月31日

摘要： DynamoDB Consistency Models Eventually Consistent Reads Consistency across all copies of data is usually reached within a second Best for read perfora 阅读全文

posted @ 2021-05-31 20:22 Zhentiw 阅读(194) 评论(0) 推荐(0)

[DynamoDB] DynamoDB as Session State Cache

摘要： It's common to use DynamoDB to store session state auto scaling feature vs ElastiCache: ElasitCache is in-memory, but DynamoDB is serverless Both are 阅读全文

posted @ 2021-05-31 20:01 Zhentiw 阅读(63) 评论(0) 推荐(0)

[AWS DA] DynamoDB Transactions Calculation for RCU / WCU

摘要： Consume 2 x of WCU / RCU 5 KB item size, transactional item writes per second: 3 (5 / 1) * 3 * 2 = 30 WCU Transactional Item reads per second: 5 Celli 阅读全文

posted @ 2021-05-31 19:55 Zhentiw 阅读(112) 评论(0) 推荐(0)

[AWS DA] DynamoDB CLI

摘要： Using --project-expression: aws dynamodb scan --table-name users --projection-expression "user_id,game_id" { "Items": [ { "user_id": { "S": "ersaessew 阅读全文

posted @ 2021-05-31 19:50 Zhentiw 阅读(129) 评论(0) 推荐(0)

2021年5月27日

[Serverless] Refactoring: Using Ports and Adapters pattern to refactor code

摘要： The original code: createGroup.ts: import { v4 as uuidv4 } from "uuid"; import "source-map-support/register"; import * as AWS from "aws-sdk"; import { 阅读全文

posted @ 2021-05-27 00:54 Zhentiw 阅读(93) 评论(0) 推荐(0)

2021年5月24日

[Cloud DA] Serverless Framework with AWS - Part 1: DynamoDB & ApiGateway

摘要： Part 1 Of Serverless Framework with AWS DynamoDB & ApiGateway Build a Lambda function get data from DynamoDB: src/lambda/http/getGroups.ts import * as 阅读全文

posted @ 2021-05-24 22:12 Zhentiw 阅读(135) 评论(0) 推荐(0)

[Cloud DA] Serverless Framework with AWS - Part 0: Serverless Project structure

摘要： Part 0 of Serverless Framework with AWS Serverless Project Structure New configuration format Please notice that the default structure of the TypeScri 阅读全文

posted @ 2021-05-24 22:09 Zhentiw 阅读(61) 评论(0) 推荐(0)

[AWS] Lambda Middleware

摘要： You can find more information about Middy library and all available middleware here Here is an example for how to use cors Middy middleware in Lambda: 阅读全文

posted @ 2021-05-24 14:38 Zhentiw 阅读(74) 评论(0) 推荐(0)

2021年5月23日

[Security] Verifying an Auth0 token

摘要： Auth0 returns a JWT token JSON that contains information about a user No need to send a request to Auth0 to verify JWT What pervents anyone to generat 阅读全文

posted @ 2021-05-23 23:07 Zhentiw 阅读(82) 评论(0) 推荐(0)

2021年5月20日

[AWS] ElasticSearch, Sync data between DynamoDB and ElasticSearch by using DyanmoDB Stream

摘要： Full-Text Search Find images by names What this usually means Support search by any field Tolerate typos Support highlight Rank search result So when 阅读全文

posted @ 2021-05-20 21:38 Zhentiw 阅读(622) 评论(0) 推荐(0)

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