Skip to main content

AWS Lambda lifecycle and in-memory caching

The ephemeral nature of AWS Lambda functions might have you believe that techniques like in-memory caching cannot be utilized like you would with a conventional server, but that’s not the case! Let’s check out why.

TJ Holowaychuk on Medium.com

Even though you can't fully rely on them, our experimentation has shown that global variables can be used for some opportunistic caching. Amazon Lambda launches a number of computer instances to run function invocations, and keeps them alive for an unspecified period of time, which may be several hours. During this time, Lambda functions can access cached data previously stored in global variables. When a function invocation happens to run on a fresh instance, data has to be fetched from a more persistent source again.

Amazon AWS Lambda data caching solutions compared
Labels:

Comments

Post a Comment

Most Favorite Posts

Firebase realtime database stability - and monitoring

Firebase SLA Firebase will use commercially reasonable efforts to make Firebase available with a Monthly Uptime Percentage (defined below) of at least 99.95%, in each case during any monthly billing cycle (the "Service Commitment"). Firebase SLA Service Level Agreement for Hosting and Realtime Database Firebase Status Page Why Firebase sucks In the 3 years since starting to use Firebase we’ve suffered from so many outages I’ve literally lost count. @ Medium.com Status History Overview Statusgator Does anyone has real-life experience with the stability of Firebase or Firestore? Please leave a comment! We heared that Firestore is much more stable than Firebase which usage for new project is discouraged...
Post a Comment
Read more

TechLead: React Native vs Flutter vs WebView - Hybrid Mobile App Development for 2018

Topics covered: Xamarin, Cordova, Flutter, Titanium, React Native, Flutter React Native Web Views Native Development: iOS and Android Types of apps: Fully native high interactivity expensive: iOS and Android high interactivity, personalization, performance worth for top 50 apps less and less apps are installed you need to shine to be discovered user picks only best app among similar featured apps Hybrid Technologies Xamarin, Cordova, Flutter, Titanium, React Native, Flutter Be aware of the maturity lock-in effect infrastructure and tooling required might get worst of both world should be incrementable updatable check where it makes sense WebViews only Native App shells: Amazon App, Apple App Store, WeChat Mainly for smaller companies Trending on Google Links: AirBnB is sunsetting its React Native development What’s Next for Mobile at Airbnb Server-Driven Rendering Even though we’re not using React Native, we still see the val...
1 comment
Read more

Understanding Automatic Reference Counting in Objective-C

Automatic Reference Counting (ARC) largely removes the burden of manual memory management, not to mention the chore of tracking down bugs caused by leaking or over-released objects! Despite its awesomeness, ARC does not let you ignore memory management altogether. This post covers the following key aspects of ARC to help you get up and running quickly. Reference Counted Memory: Quick Revision How Automatic Reference Counting Works Enabling ARC in Your Project New Rules Enforced by ARC ARC Qualifiers – Declared Properties ARC Qualifiers – Regular Variables Migrating Existing Projects to ARC Including Code that is not ARC Compliant Should I Use ARC? The Long Weekend Website
Post a Comment
Read more

Validity Time Auto-Renewables in Sandbox

The subscription durations, sandbox durations and incentive durations of auto-renewables. Hint: In Sandbox the validity time differs from live environment!!! Durations Sandbox Duration Incentive Durations (optional) 7 days 3 minutes 7 days 1 month 5 minutes 7 days, 1 month 2 months 10 minutes 7 days, 1 month 3 months 15 minutes 1 month 6 months 30 minutes 1 month, 2 months 1 year 1 hour 1 month, 2 months, 3 months After 6 extensions the abo is cancelled automatically in the sandbox environment.
Post a Comment
Read more

iOS and Android native App Install Banner

Android Native App install banners are similar to Web app install banners, but instead of adding to the home screen, they will let the user install your native app without leaving your site. Developer Google iOS Promoting Apps with Smart App Banners: Safari has a new Smart App Banner feature in iOS 6 and later that provides a standardized method of promoting apps on the App Store from a website. Developer Apple
Post a Comment
Read more

iOS Data Storage Guidelines

Only documents and other data that is user-generated , or that cannot otherwise be recreated by your application, should be stored in the < Application_Home >/Documents directory and will be automatically backed up by iCloud. Data that can be downloaded again or regenerated should be stored in the < Application_Home >/Library/Caches directory. Examples of files you should put in the Caches directory include database cache files and downloadable content, such as that used by magazine, newspaper, and map applications. Data that is used only temporarily should be stored in the < Application_Home >/tmp directory. Although these files are not backed up to iCloud, remember to delete those files when you are done with them so that they do not continue to consume space on the user’s device. Use the "do not back up" attribute for specifying files that should remain on device, even in low storage situations . Use this attribute with data that can be recr...
Post a Comment
Read more

JSLint

Many JavaScript implementations do not warn against questionable coding practices. Yes, that's nice for the site that "works best with Internet Explorer" (designed with templates, scripted with snippets copied from forums). But it's a nightmare when you actually want to write quality, maintainable code. That's where JavaScript Lint comes in. With JavaScript Lint, you can check all your JavaScript source code for common mistakes without actually running the script or opening the web page. JavaScript Lint holds an advantage over competing lints because it is based on the JavaScript engine for the Firefox browser. This provides a robust framework that can not only check JavaScript syntax but also examine the coding techniques used in the script and warn against questionable practices. JavaScript Lint Online Form
Post a Comment
Read more