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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1
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1answer
68 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 ...
0
votes
0answers
24 views

What's the best monitoring program for my server stack? [duplicate]

Basics I know, I know, this is kind of a duplicate, but not really, I'll show you why. I'm currently building an application that I'm scaling out over more servers, and while that's enough of a fun ...
2
votes
1answer
35 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
27 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
26 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
32 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
33 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
65 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
54 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
100 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
42 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
votes
0answers
56 views

What is wrong with this Server Configuration? [closed]

Working on a scalable server configuration in Amazon EC2. Amazon Instance with /mnt/xvdf - Ubuntu OS /mnt/xvdg - additional volume with app data 2nd instance with /mnt/xvdf - Ubuntu OS /mnt/xvdg - ...
1
vote
2answers
72 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
126 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
166 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
182 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
36 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
0answers
84 views

Are average QPS mainly driven by request latency in Google App Engine apps?

90% of the operational costs in my GAE app are instance hours. I would like to increase the average QPS so that fewer instances are needed to handle the same load. Are QPS mainly driven by the ...
0
votes
1answer
108 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
96 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 ...
3
votes
5answers
2k 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
59 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
68 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
52 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
132 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
296 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
54 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?
0
votes
0answers
304 views

Nginx Unix vs TCP sockets

I had a scalability problem on a Django website, basically with 4000 online users the website was not accessible, I run some load test: ab -n 1000 -c 100 http://www.domain.com/ The performance was ...
5
votes
2answers
126 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
178 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
2k 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
1k 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
70 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
286 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
79 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
169 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
887 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
43 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
249 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
106 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
174 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
70 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
119 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 ...
0
votes
3answers
206 views

Apache stops serving requests when connections increase [duplicate]

Possible Duplicate: Apache performance issue, after “1000 total children” Apache no longer responds to HTTP requests. Not MaxClients issue? The values for MaxClients, ...
2
votes
2answers
246 views

Dynamically changing one-node Cassandra cluster to two nodes

So I have an application that will be very dormant most of the time but will need high-bursting a few days out of the month. Since we are deploying on EC2 I would like to keep only one Cassandra ...
4
votes
3answers
167 views

Risks of Network Partitioning When a Split Brain Creates a Security Flaw

I'm looking to create a high-availability, scalable networking solution by using a distributed system of data. A node here, describes a network that has control over one copy of the data. These nodes ...
4
votes
1answer
369 views

nagios automation in big scale

I would like to know if you have an experience or any idea about how to set up nagios in big scale. Previously we used nagios and nagiosql for manual settings, it was pretty comfortable for few ...
5
votes
0answers
1k views

Multithreading with multi-queue NIC on SMP system [closed]

How are packets scheduled from network interface queues to CPUs, then onwards to threads for processing? What needs to be considered when it comes to how packets are hashed across queues, hardware ...
0
votes
2answers
117 views

EC2 cost-effective webapp scaling

I have a webapp running in a Media Temple VPS account, and I'm currently evaluating the gains to switch to Amazon EC2. It's running under Apache 2 web server. This webapp for now has almost no access ...
3
votes
0answers
367 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 ...