Running Your Database in Running Your Database in the Cloudthe Cloud

Types of Cloud DatabaseTypes of Cloud Database

Trends Towards App Trends Towards App Development in CloudDevelopment in Cloud

Cloud Technology interest in Cloud Technology interest in recent years Google Trendsrecent years Google Trends

Cloud Database providers as Cloud Database providers as backbone for your mobile backbone for your mobile applications.applications.

Parse.com AdvantagesParse.com AdvantagesFree of cost .Prewritten code for many Sdk’s for

User authentication Chat ,Stripe, precode many 3rd party api is ready to use if requirement is simple and easily fit in parse.com

Free hosting via Cloud Code.Middle wareSdk is provided for

development in Ios and Andriod .Direct database access no need to

write Api

The Pros of Cloud The Pros of Cloud TechnologyTechnology

Few Popular Cloud Service Few Popular Cloud Service ProvidersProviders

Parse.com DisAdvantagesParse.com DisAdvantages 160 API requests per minute for ENTIRE app (not one instance!) (changed to 30+ req/s but it costs quite a lot limited number of COUNT operations (differs every time, but surely under 160) if you are counting objects with the count higher that just a 1000, the system switches to “approximate count” any function can not take longer than 3 seconds if that function is in a cloud that time can last 7 seconds scheduled jobs can last a maximum of 15 minutes, but you have to put ALL of your code in one function

(which basically makes it unreadable for later usages) maximum of 2 concurrent jobs (threads) no mutex/lock/semaphore logic no custom atomic operations (just a few are available, and they are not that useful) this makes it very very hard to solve concurrency problems log system remembers only 100 last logs live logging in the system has a tendency to simply skip a log or two (which makes debugging really funny) you can pull a maximum of 1000 objects in a request, which also applies on inner queries push notifications have delay (even up to one hour) LIMIT SKIP operation can skip a maximum of 10 000 objects no DISTINCT operation, you have to implement distinct yourself by parsing data lack of incase sensitive string queries, you need to store additional lowercase column in your database uptime of parse system is also an issues. Quite a few times, parse was unavailable in general for 30minutes no native Paypal integration support, or ability to implement paypals SDK – we had to use separate node.js

hosting server to support payments and cash distribution through Paypay no debugger when writing cloudcode – you have to rely on logs only, and they have their own issues mentioned

above no option to delete an entire class from parse via API. image if you wanted to drop logs ?

Trend toward databasesTrend toward databases

The ChallengesThe ChallengesDevelopment CostingR & D Required when switching

to new cloud service providerSolved for the Web and

application levels also