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
votes
4answers
127 views

Optimal value for Nginx worker_connections

Nginx worker_connections "sets the maximum number of simultaneous connections that can be opened by a worker process. This number includes all connections (e.g. connections with proxied servers, among ...
0
votes
2answers
498 views

https scalability for concurrent connections

I am a building a site right now that has a lot of chat messages and social communication moving between users in both real-time and accessed through archives (text material, not images). I want to ...
3
votes
1answer
724 views

Multiple DNS names and IP address to make load balancing more efficient in an Exchange CAS Array

The tl;dr problem The CAS server occasionally gets one or two NAT'ed IP addresses that have several hundred users behind it. That is bad for scalability. The tl;dr solution Have the NAT'ed ...
2
votes
1answer
581 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 >=...
1
vote
1answer
107 views

Managing both servers and Docker containers with serf

I'm using Serf to instead of linking containers together so I can restart Docker containers without links breaking. On each server I run one container with the Serf ports exposed that every other ...
1
vote
1answer
132 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. ...
1
vote
1answer
140 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 ...
1
vote
1answer
69 views

Is it a good idea to separate the Database and the website files in 2 shared hosting?

Do you think If I did separate the db and the files will make it performs better? and is this easy thing to do? What if I upgrade later on to 2 VPS as well, can I do the same thing without affecting ...
1
vote
1answer
478 views

Which requests cause a w3wp process to grow considerably?

On a production environment, how can one discover which Asp.Net http requests, whether aspx or asmx or custom, are causing the most memory pressure within a w3wp.exe process? I don't mean memory leaks ...
0
votes
1answer
24 views

AWS autoscaling triggers

I am going to move a very big wordpress website (in terms of DB) to AWS. And I would like to understand the autoscaling triggers in order to find the best balance between costs and performance. Are ...
0
votes
1answer
836 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 sample,...
0
votes
1answer
617 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 ...
0
votes
1answer
924 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 ...
0
votes
1answer
83 views

Utilizing two servers (LAMP)

I currently have my web app on a single cloud server. Been doing this for a few months now and I have EVERYTHING on this instance (app, cron scripts, mysql, svn, dev environment, etc). The site is ...
10
votes
0answers
595 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 ...
3
votes
0answers
200 views

Is RSS (receive side scaling) in Windows considered unstable?

When asking a customer to enable RSS in their data center to improve network performance (very high UDP packets-per-sec rate), I was told that they generally turn it off, because after various ...
2
votes
0answers
38 views

How to aggregate a large cron mail volume

How do you handle a large volume of cron mails (from a thousand servers) in a smart way? Main use case: a cron error comes in, but its severity does not warrant immediate action. However, I do not ...
2
votes
0answers
67 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 ...
1
vote
0answers
60 views

Intel Xeon processors: Difference between 2S/4S and S2S/S4S scalability

While comparing Intel Xeon E5 and E7 processors, I've noticed that E5 processors are specified for 2S or 4S scalability, while E7 processors are specified for S2S, S4S, or S8S scalability. I ...
1
vote
0answers
23 views

Make Varnish check for html static before serving

I was thinking of writing some logics to my application so that it can write the static page content to s3 or some CDN and serve primarily from there. But am not sure if this is possible. For ...
1
vote
0answers
171 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 ...
1
vote
0answers
80 views

Whats the next scalability step after seperate mysql farms?

I'm running a saas service which is growing rapidly. The customers are ecommerce websites and we get hit on every page view on each of our customers sites (currently 10M's hits/day). The current ...
1
vote
0answers
110 views

How can I scale my RoR applications?

I am developing a Ruby On Rails application and would like to deploy in a production environment. I have multiple identically configured Ubuntu web servers I can use but I don't know how to scale ...
0
votes
0answers
21 views

Best practice for separating MariaDB and Web App to separate servers?

I have a Centos 7 LAMP stack with a WordPress installation that I'd like to split up. I'm using Google Compute Engine as my cloud hosting solution. For reference I start with digital oceans guide ...
0
votes
0answers
122 views

nginx: Dynamically limit requests based on path

We have a service that serves up user-created assets dynamically. So a user can upload a file and share it using a url like /path/to/asset/unique_id. We currently use the limit_conn module to protect ...
0
votes
0answers
191 views

Direct server return loadbalancer for mariadb galera cluster with 2 networks

Is it possible to configure LVS (keepalived) loadbalancer with direct server return (DSR) for 2 leg network setup? The desired architecture is as follows: mariadb galera cluster, where each node has ...
0
votes
0answers
137 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 ...
0
votes
0answers
454 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 ...