Questions tagged [cloud]
Cloud computing is about hardware-based services involving computing, network and storage capacities. These services are provided on-demand, hosted by the cloud provider and can easily scale up and down.
9,703
questions
408
votes
12
answers
584k
views
What is SaaS, PaaS and IaaS? With examples
What do the following terms mean?
SaaS
PaaS
IaaS?
There are various cloud services available today, such as Amazon's EC2 and AWS, Apache Hadoop, Microsoft Azure and many others. Which category does ...
- 6,349
202
votes
5
answers
117k
views
Do on-demand Mac OS X cloud services exist, comparable to Amazon's EC2 on-demand instances? [closed]
Amazon's EC2 service offers a variety of Linux and Windows OS choices, but I haven't found a service offering a similar "rent by the hour" service for a remote Mac OS X virtual machine. Does such a ...
- 20.4k
162
votes
9
answers
224k
views
What is the recommended way to delete a large number of items from DynamoDB?
I'm writing a simple logging service in DynamoDB.
I have a logs table that is keyed by a user_id hash and a timestamp (Unix epoch int) range.
When a user of the service terminates their account, I ...
- 2,819
157
votes
13
answers
100k
views
Force CloudFront distribution/file update
I'm using Amazon's CloudFront to serve static files of my web apps.
Is there no way to tell a cloudfront distribution that it needs to refresh it's file or point out a single file that should be ...
- 5,247
122
votes
6
answers
145k
views
What is the difference between Cloud, Grid and Cluster? [closed]
What is the difference between Cloud, Cluster and Grid? Please give some examples of each as the definition of cloud is very broad. As answered in another question, can I call Dropbox, Gmail, Facebook,...
- 7,785
120
votes
10
answers
122k
views
How can size of the root disk in Google Compute Engine be increased?
The root disk size in GCE is 10 gigs. How do I increase this? I cant find the option in the console or the gcutil flags. This can be easily done in AWS.
- 1,633
107
votes
3
answers
76k
views
What's the difference between BigQuery and Bigtable? [closed]
Is there any reason why someone would use Bigtable instead of BigQuery? Both seem to support Read and Write operations with the latter offering also advanced 'Query' operations.
I need to develop an ...
- 10.5k
103
votes
8
answers
64k
views
How to make many files public in Google Cloud Storage?
I have 1000 files in Google Cloud Storage to make public, or in general a directory hierarchy.
In the Web UI, I can only seem to make one at a time public.
Is there some way to do this.
- 2,640
103
votes
12
answers
133k
views
What is the difference between scalability and elasticity?
I've heard many people using both terms interchangeably. However, in my opinion there is difference between them:
SCALABILITY - ability of a software system to process higher amount of workload on ...
- 1,134
103
votes
7
answers
111k
views
Is it possible to perform a batch upload to amazon s3?
Does amazon s3 support batch uploads?
I have a job that needs to upload each night ~100K of files that can be up to 1G but is strongly skewed towards small files (90% are less than 100 bytes and 99% ...
- 267k
91
votes
7
answers
12k
views
When should one use the following: Amazon EC2, Google App Engine, Microsoft Azure and Salesforce.com? [closed]
I am asking this in very general sense. Both from cloud provider and cloud consumer's perspective. Also the question is not for any specific kind of application (in fact the intention is to know which ...
- 8,750
90
votes
2
answers
41k
views
What's the difference between Red/Black deployment and Blue/Green Deployment?
I've heard both used to describe the idea of deploying an update on new machines while keeping old machines active, ready to rollback if an issue occurs. I've also heard it used to describe sharing ...
- 2,003
89
votes
4
answers
116k
views
What does ECU units, CPU core and memory mean when I launch a instance
When I launch an instance on EC2, it gives me option for t1.micro, m1.small, m1.large etc. There is a comparision chart of vCPU, ECU, CPU cores, Memory, Instance store. Is this memory RAM of a system ?...
- 1,515
87
votes
7
answers
102k
views
Docker-compose, conditional statements? (e.g. add volume only if condition)
I want to add a volume to my service, but only if the final user gave a folder for it. Otherwise, no volume should be mounted, for the already-prepared image has valid data in a default folder.
That ...
- 5,367
83
votes
7
answers
59k
views
Automating pydrive verification process
I am trying to automate the GoogleAuth process when using the pydrive library (https://pypi.python.org/pypi/PyDrive).
I've set up the pydrive and the google API such that my secret_client.json works ...
- 119k
74
votes
8
answers
108k
views
What is the difference between Cloud Computing and Grid Computing? [closed]
What are the significant differences between Cloud Computing and Grid Computing ? What are the precise definations and target application domains for both ? I'm looking for conceptual insights along ...
73
votes
4
answers
27k
views
Elastic Beanstalk without Elastic Load Balancer
I would like to switch off Elastic Load Balancer (ELB) for my Elastic Beanstalk environment.
Currently I don't need it and I don't want to pay for it.
It is possible to delete the ELB in EC2 ...
- 16.5k
72
votes
9
answers
107k
views
How do I make cloud-init startup scripts run every time my EC2 instance boots?
I have an EC2 instance running an AMI based on the Amazon Linux AMI. Like all such AMIs, it supports the cloud-init system for running startup scripts based on the User Data passed into every instance....
- 17.3k
71
votes
4
answers
24k
views
2PC vs Sagas (distributed transactions)
I'm developing my insight about distributed systems, and how to maintain data consistency across such systems, where business transactions covers multiple services, bounded contexts and network ...
- 22.7k
67
votes
3
answers
56k
views
How do you create an EC2 instance with multiple key pairs?
While creating an EC2 instance, we provide a key pair name.
But generally, I associate multiple SSH public/private keys with any remote server. I know that it's not possible to attach a key pair once ...
- 3,661
65
votes
5
answers
21k
views
Should I persist images on EBS or S3?
I am migrating my Java,Tomcat, Mysql server to AWS EC2.
I have already attached EBS volume for storing MySql data. In my web application people may upload images. So I should persist them. There are ...
- 3,123
65
votes
4
answers
13k
views
Cloud Foundry explained
So I've been reading up on Cloud Foundry and yet I'm still confused as to what it is. Here is my take anyway on PaaS on CF, and hopefully you guys could tell me if I'm wrong and explain it a bit ...
- 1,583
65
votes
5
answers
18k
views
Experiences on free and low-cost hosting for play framework applications? [closed]
I'd like to know your experience finding a host for play applications on free or low-cost servers
So far now I found the following options:
Playapps (discontinued)
A cloud hosting solution by ...
- 61.8k
64
votes
2
answers
16k
views
how to reserve a running amazon ec2 instance? [closed]
we have a large ec2 instance running in asia pacific region.we want to reserve that particular instance.In aws management console we see an option to purchase a reserved instance but there seems to ...
- 661
64
votes
5
answers
37k
views
AWS - What are the exact differences between EC2, Beanstalk and LightSail?
What are the exact differences between EC2, Beanstalk and LightSail in AWS?
What are good real time scenarios in which I should use these services?
- 793
64
votes
6
answers
50k
views
How to rename the Azure WebApp URL
For numerous time it has happened that our DevOps guys have created a Azure WebApp with incorrect URL.
Which forced us the delete the resource group (as group contains web app, sql azure etc.) And ...
- 17.2k
62
votes
2
answers
30k
views
Single Sign-On in Microservice Architecture
I'm trying to design a green-field project that will have several services (serving data) and web-applications (serving HTML). I've read about microservices and they look like good fit.
The problem I ...
- 10.9k
61
votes
5
answers
68k
views
Difference between cloud computing and distributed computing? [closed]
I wanted to know about the difference about cloud computing and distributed computing. I read an article about cloud computing and got a feeling that somewhere there is a relation between cloud ...
- 102k
60
votes
4
answers
25k
views
Service discovery vs load balancing
I am trying to understand in which scenario I should pick a service registry over a load balancer.
From my understanding both solutions are covering the same functionality.
For instance if we ...
- 2,520
58
votes
7
answers
19k
views
Windows Azure or Amazon EC2 for ASP.NET MVC Development?
If you want to build enterprise ASP.NET MVC applications that use MSSQL databases is it better to use Windows Azure or Amazon EC2?
I didn't find any satisfying answers.
So what are the advantages ...
- 2,580
56
votes
4
answers
68k
views
How to edit files in AWS S3 in the browser?
I have hosted my Homepage over Amazon's S3 system. In order to change information on the page, currently, I have to change the file on my computer and upload the new version. However, I would like to ...
- 1,409
53
votes
6
answers
43k
views
Amazon EC2 - Swap root instance store device with EBS device
I have an EC2 instance with "instance store" device as a root device.
Now, I would like to attach an EBS volume to that same instance,
only that I want it to be the root device.
Is that possible?
What ...
- 802
50
votes
32
answers
104k
views
Heroku not recognized as an internal or external command (Windows)
Following this heroku tutorial to launch an app on heroku. But when I use the command heroku create, it says it's not recognized. I added C:\Program Files\Heroku to my PATH. How do I fix this?
- 2,427
48
votes
13
answers
12k
views
What is Cloud computing? [closed]
Could anybody explain in plain words how Cloud computing works?
I have read the Wikipedia article, but still not sure that I understand how cloud actually works.
- 75.1k
48
votes
13
answers
27k
views
What alternatives are there to Google App Engine? [closed]
What alternatives are there to GAE, given that I already have a good bit of code working that I would like to keep. In other words, I'm digging python. However, my use case is more of a low number ...
- 34.4k
48
votes
7
answers
33k
views
Differences between Azure App Services and Cloud Services
I've started learning about Microsoft Azure last year and one of the services provided was the Cloud Services. The way I understand Cloud Services is that it is a service meant to allow one to build N-...
- 11.2k
46
votes
1
answer
42k
views
What does 'Compute Engine Network Internet Egress' mean to Google Cloud?
I've started a simple Tomcat webserver in Google Cloud Platform, this month I was charged for a service called 'Compute Engine Network Internet Egress from Americas to China: 2636.552 Gibibyte (...
- 6,700
44
votes
2
answers
119k
views
how to use free cloud database with android app? [closed]
I am developing an Google maps android application in which I want to use database in cloud for saving usernames, passwords, GPS Locations etc.
Can any option to achieve this with free of cost ?
If ...
- 1,671
43
votes
18
answers
9k
views
Why would you not want to use Cloud Computing [closed]
Our company is considering moving from hosting our own servers to EC2 and I was wondering if this was a good idea.
I have seen a lot of stuff about can cloud computing (and specifically EC2) do x, or ...
- 13.8k
41
votes
1
answer
32k
views
Negate a Condition in CloudFormation Template
I have the following condition, accordingly to that condition I create some resources, while if that condition is not met then I create other resources.
Conditions:
ISProduction:
"Fn::Equals":
...
- 2,927
40
votes
7
answers
116k
views
Login credentials of Ubuntu Cloud server image
I am trying to build a cloud infrastructure using VM's
In the Openstack manuals, it is mentioned that the images in this link contain, Openstack pre-installed.
I downloaded the trusty-server-...
- 621
40
votes
1
answer
14k
views
Real alternatives to Windows Azure PaaS (web role)? [closed]
I am looking for alternatives to the Windows Azure PaaS (Platform as a Service) offering, meeting the following requirements:
The platform should provide high availability and scalability.
The ...
- 532
38
votes
7
answers
61k
views
An IP address of EC2 instance gets changed after the restart
I am running an EC2 Linux instance. For some maintenance purposes I shutdown the instance and started it again. However, EC2 IP has changed now.
How to keep an IP address of Amazon EC2 instance ...
- 750
36
votes
6
answers
85k
views
Cloud Firestore: how to fetch a document reference inside my collection query and map it as a JSON value?
Let's say I have a collection of comments. Every comment object has a "doc ref" to the user who posted. I need a query that will return a list of comments including the value of every single user ...
- 361
36
votes
6
answers
86k
views
How can I access s3 files in Python using urls?
I want to write a Python script that will read and write files from s3 using their url's, eg:'s3:/mybucket/file'. It would need to run locally and in the cloud without any code changes. Is there a ...
- 6,881
36
votes
5
answers
22k
views
free cloud data stores that use get/post? [closed]
I know that there are other key/value stores similar to http://openkeyval.org out there but i cannot remember their names.
Please enlighten me.
i need the following features:
free
can be used via ...
- 57.5k
35
votes
8
answers
25k
views
Can Git and iCloud Drive be effectively used together?
In the same flavor as this question, are there any possible complications that can arise when using the two services together?
- 2,652
35
votes
5
answers
51k
views
How to extract files from a zip archive in S3
I have a zip archive uploaded in S3 in a certain location (say /foo/bar.zip)
I would like to extract the values within bar.zip and place it under /foo without downloading or re-uploading the extracted ...
- 5,778
35
votes
2
answers
32k
views
Custom URL in AWS Elastic Beanstalk
AWS Elastic Beanstalk suggests using a URL in the following format: https://{appname}.elasticbeanstalk.com/
But I need to change it to my own URL, something like https://tarta.ai
How to do it?
- 2,145
35
votes
12
answers
5k
views
Is there a business proven cloud store / Key=>Value Database? (Open Source) [closed]
I have been looking for cloud computing / storage solutions for a long time (inspired by the Google Bigtable). But I can't find a easy-to-use, business-ready solution.
I'm searching a simple, fault ...
- 4,699