The ability of a system, network, or process, to handle growing amounts of work in a graceful manner or its ability to be enlarged to accommodate that growth.

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0
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0answers
27 views

Scale automatically by monitoring the load in app server

I have a regular setup with 4 droplets in DigitalOcean. One for Haproxy as load balancer, two for app servers, run same Django application and one for database. It's quite easy to add another app ...
4
votes
2answers
176 views

Scale HAProxy for more than 64k websockets

We are trying to design an architecture that will be able to handle more than 64k websockets. We first tried with Amazon ELB, but its design doesn't allow unexpected spike of traffic nor websocket. ...
0
votes
1answer
102 views

Nginx+PHP scalability on Windows

I'm trying to understand Nginx+PHP scalability running Windows with, lets say, 100 requests doing a medium-term operations. Analyzing source code I saw: Nginx start a spawns itself several times ...
0
votes
1answer
107 views

Is it possible to do autoscaling for elasticsearch in AWS at peak load?

I'm new to ElasticSearch but I'm already using ElasticSearch on my production site. I installed ElasticSearch in one EC2 instance. After using ElasticSearch for several month, now currently the CPU ...
0
votes
1answer
67 views

Creating a scalable back-up cluster with one interface and retention

Currently I'm running a number of back-up servers to back-up other servers with, e.g. b01, b02, .., bn, all with their own IP's, running their own FTP / SSH services. However, I would like to create ...
2
votes
1answer
81 views

How to launch EC2 instance with preconfigured AWS Alarm

I wan't to kill a specific instance when some of it's hardware consumption metrics reaches a certain level. If i create an alarm for the scaling group (setting maximum cpu consumption threshhold to ...
-2
votes
2answers
81 views

Scaling Up a Small Wordpress Site

I apologize in advance if this has been asked/answered a lot. I don't know enough yet to know what I don't know. We have a Wordpress site on a typical LAMP shared hosting platform that was getting ...
0
votes
1answer
41 views

Is it viable to run a script that serves images from database?

I run a very dynamic game review site. All the images (screenshots, game thumbnails, user profile pics, etc.) are served via a PHP script on the server. It takes the id as a parameter and reads the ...
10
votes
3answers
503 views

What types of systems have to “scale up” rather than “scale out”?

I have been wondering for a long time if there are systems that have to "scale up" (onto a more powerful, more expensive server) rather than "scale out" by being split across many smaller servers. ...
0
votes
0answers
202 views

Horizontal Versus Verticale Scaling for Large Scale RoR Application (High CPU and Memory Usage)

We are launching a high demand (several hundred simultaneous users) Ruby on Rails application and we are trying to determine the best way to scale. Currently, we have a setup that follows this ...
1
vote
1answer
22 views

IIS FTP: Should i create sites or folders?

I need to create a service to host several ip cameras, in the beginning 500+. The ip cameras send the files over ftp, so, to identify each camera, the files must go to separated folders. Now the ...
1
vote
1answer
105 views

Is this load balancing / horizontal scaling scheme naive?

I offer my solution to the following problem, and ask you networking and server admin professionals to validate it or poke holes in it. I am interested in any obvious attack vectors or scalability ...
2
votes
1answer
38 views

Confused about horizontal scalling

Please correct me if I am wrong but I guess handling more requests and load by adding more machines or balancing the load between multiple servers is horizontal scalling. So, if I add more servers, ...
1
vote
2answers
77 views

Scaling web application across multiple services

We're developing our web application and have been working on reducing our load times. When we began developing the application, we signed up with a well known hosting provider offering "dedicated ...
2
votes
1answer
52 views

Scalability in a High Availability Environment - SQL Failover Cluster 2012

I have created an environment where 1 SAN is connected with 2 Nodes (part of SQL Server 2012 Failover Cluster) of SQL Server. Windows Server 2008 R2 is used, and single DB is stored in SAN. We have ...
0
votes
0answers
65 views

What is a good set of performance counters to measure scalability bottlenecks

We're moving our enterprise product to the cloud (IAAS) and are determining how many users we can support on a single VM. Our product uses SQL Server, SharePoint and a bunch of WCF services. What ...
-1
votes
1answer
46 views

Scalable Cloud solution for High Availability [closed]

Scenario: I am about to launch a cloud software in a couple months. This will be a SaaS solution for multiple clients. The software deals with Healthcare o Encryption at rest is a requirement. It is ...
1
vote
0answers
70 views

VPN/tunneling/proxy service for devices in the field

I'm trying this question here, but if there's a better stack exchange or somewhere else that's more appropriate, please let me know. Thanks! We have a number of devices in the field in corporate ...
1
vote
1answer
82 views

How to get approx 500request/sec in HAProxy and Tomcat7 with Apache

I have 4 intstances of Tomcat 7 server and deployed my web App on all the instances. I am using HAProxy load balancer for load balancing. In front end I am using Apche2 web server and behind Tomcat 7. ...
3
votes
3answers
116 views

How to handle multiple DNS servers efficently?

I've recently added more BIND9 DNS servers to my network, and the work of adding each zone/domain i want the slave nodes to be a slave to is becoming far too repetitive, not to mention that having ...
-1
votes
1answer
46 views

What kind of scaling method is it, when you add new software to a single server to handle more users? [closed]

I have read about scaling (in terms of terminology and methods). This got me confused about the following: On a single computer, running a web server (say apache), if the system administrator adds a ...
1
vote
2answers
164 views

Standalone / separate server as PHP processor for other nodes

From what I've seen in various docs and example configurations, you could have PHP-FPM set up on a different server/hardware, separate from your webserver (nginx in my case). While most examples list ...
1
vote
1answer
415 views

Best way to setup hosting and scale SaaS application [closed]

I'm a software developer with experience setting up hosting environments for small applications and no more than 5k hits a day type of traffic. I just built a SaaS application and I'm wondering how to ...
0
votes
1answer
410 views

How can I determine Breaking point of my Web application using JMeter?

How can I determine Breaking point of my Web application using JMeter? I have executed the JMeter Testplan with different concurrent users load. EX. 300 users(0% error), 400 users(7% error in a ...
0
votes
2answers
362 views

Securing Magento against high-traffic situations

Hi i have an apache server 2.2 with php (magento) scripts. in normal times a php page renders in 1-2 sec, which is ok. Sometimes at high traffic or crude spider bots all Apache-Slots are blocked. ...
0
votes
1answer
37 views

redundancy / load balancing on 2 unmanaged dedicated Windows-based servers

We normally host our dedicated servers in an unmanaged data centre, i.e we just purchase the server and we can manage it ourselves via remote desktop connection. We cannot install / configure any ...
0
votes
1answer
319 views

Is memory usage the main cause of instance churn on Google App Engine? [closed]

I am experiencing sharp drops and spikes in instance count every 30 minutes although the request rate has been stable for 2h at 2.4k RPS. Periodically there are a lot of warmup requests after many ...
0
votes
1answer
235 views

Distributed SSL session cache

Need to setup a scalable backend infrastructure for a mobile app. Connections to the API need to be SSL encrypted. To achieve a simple scalable solution i don't want to terminate SSL at the load ...
5
votes
5answers
3k views

AWS: Multi-region setup using single RDS instance

I'm trying to scale our web application (PHP, MySQL, memcache) in a multi-region scheme. Currently we are using a setup with two EC2 instances behind an ELB and an RDS instance, all of them in US-EAST ...
0
votes
0answers
77 views

Dedicated server vs VPS: advice on scaling site

We could use advice on a scaling/ops issue. We have a simple mobile app that runs on Rails 3.2.12 and uses MongoMapper instead of ActiveRecord. There is one database call that sporadically performs ...
-2
votes
1answer
69 views

How to launch a site with high future growth potential. [closed]

I hope I have what is a straightforward question. As I am sure the steps of setting this up are complicated I would like to know a few things. We have a team that has been working on a great ...
2
votes
0answers
57 views

Scaling large numbers of small customer J2EE webapps

We're allowing customers to create websites on our SaaS app. We currently use Jetty as the app server, but we could use anything J2EE. I'd like to be able to scale customer webapps across our ...
0
votes
2answers
187 views

Autoscaling set-up on EC2

I'm new to web development and design (I moved over from construction where answers are much larger), and I'm trying to build a scalable AWS architecture for a Wordpress site that lives in the free ...
2
votes
3answers
491 views

Is this a sensible way to scale Nginx for static content serving?

I need to set up some VPSs for serving static content (many small files). I plan on using Nginx for this, and would like to set it up so that we are able to scale out relatively easily. The ...
0
votes
1answer
83 views

PHP-FPM as a dedicated application server?

Just wondering in terms of scalability .. do you reckon PHP-FPM should run on a standalone server or works as well if you run it with NginX on the same server?
5
votes
2answers
142 views

Load balancer explanation

I'm trying to figure out how exactly the load balancing of sites like facebook/youtube works, but I have few questions. So after alot reading I figured out that loadbalancing looks like this: When ...
0
votes
1answer
268 views

Scalable Web Hosting? [closed]

I have a website that receives heavy seasonal traffic. For much of the year, typical shared web hosting is adequate; however, the process of upgrading to VPS or dedicated hosting (when traffic gets ...
0
votes
1answer
4k views

Optimizing Apache for large concurrent requests and static files

OK, I know I'm asking a question that's been asked multiple times before (e.g. here - Serve millions of concurrent connections and static files?) but there appears to be no concrete solutions, so I ...
6
votes
4answers
2k views

PostgreSQL scaling up to 64 cores?

In this Computer World article, it specifies that PostgreSQL can scale up to a core limit of 64. Does this mean for one multi-core processor of 64 cores? Or multiple processors with fewer cores? The ...
0
votes
1answer
78 views

Easiest way to scale php and mysql website [closed]

I have read many info about optimizing websites (varnish, caching...) All these look quite complex. I wonder if cloud hosting can help me. Are there automatic scaling solutions ? Simplicity is the ...
3
votes
1answer
363 views

Using NFS for scalable PHP/MySQL web application

Here's the situation: I have a PHP/MySQL web application that accepts user uploads (pdf files). From these pdf files' pages a preview image is made on the fly and presented to the web app's users. ...
-1
votes
1answer
87 views

Choosing a database management system to maximize availability and scalability [closed]

If I was planning on choosing a database management system and know that the data needs to be available as close to 100% as possible and that it needs to scale as well as possible, is there a "best" ...
0
votes
1answer
414 views

Load testing nginx inside AWS

I'm trying to load test nginx running on AWS. I need to try to optimise it to handle 1Gbps of inbound traffic. Currently I've got it to peak at 85Mbit/s by running nginx on an m1.large with 4 other ...
3
votes
2answers
2k views

is TCP port exhaustion real? [closed]

How fast would one need to allocate ephemeral ports in order to get into the TCP port exhaustion condition? I was told there are ~4k (older Windows), ~16k (newer Windows) or ~28k (RH Linux) ports ...
2
votes
0answers
46 views

scaling website to perform equally fast worldwide [closed]

Our website is growing and we get more and more customers all around the world. We use Nginx, PHP and MySQL Our servers are in UK, so it is fast in Europe, but the further we got away from servers - ...
2
votes
0answers
351 views

Highly-available, Web-accessible and scalable deployment of statsd and graphite

I'd like to setup statsd/graphite so that I can log JS apps running on HTML devices (ie. not in a contained LAN environment, and possibly with a large volume of incoming data that I don't directly ...
1
vote
0answers
121 views

Scaling a video processing application on EC2?

I am approaching the need to scale a video-processign application that runs on EC2. So far the setup is one machine: Backbonejs frontend Rails 3.2 Postgresql Resque + S3 for storage The flow of ...
0
votes
1answer
362 views

Predictive vs Least Connection Load Balancing Techniques

I have a windows based desktop application that communicates via TCP to the application servers. (windows 2003). No sticky sessions between client calls. We have exactly 2 servers to load balance and ...
0
votes
4answers
83 views

What would be a quick fix in case of server downtime due to sudden high traffic?

Let's consider a scenario like below: A small web blog build based on LAMP stack and deployed on a shared hosting. Suddenly it becomes popular in one day and it gets million hits per day. Since the ...
1
vote
1answer
132 views

Extremely high loads despite Caching

Okay I've got a nice dedicated server running CentOs 6 with 16gb of ram, dual xenon processors, etc. However I've been experiencing high loads due to mysql. Randomly the load will go below 1.0, and ...