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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2
votes
2answers
272 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
179 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
417 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
394 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 ...
0
votes
1answer
167 views

Creating my small farm by virtual machines to learn scalability issues [closed]

I would like to create a fake server farm using virtual machines with Ubuntu server on them. I do not plan to use those as a real farm to host people websites etc. I recently read about scalability, ...
-5
votes
4answers
14k views

How to achieve 500K requests per second on my webserver? [closed]

I recently gifted myself a new dedicated server and I am trying to squeeze maximum performance out of it, for fun and learning. I am trying to achieve maximum possible requests per second this server ...
1
vote
1answer
1k views

How do you choose the EC2 instance for your django app? [duplicate]

Possible Duplicate: Can you help me with my capacity planning? My team has created a nice django app and now it is going to be deployed on an EC2 instance. Now there are a few questions ...
0
votes
2answers
164 views

Scaling web application with SQL Server 2008 database

I have a database which has 90% of read only tables. 10% of the tables has writable data. We need to scale the ASP.NET application.We need to add more users who will not be writing to the database. We ...
3
votes
2answers
114 views

Infrastructure modelling using virtual machines - a viable approach?

I'm interested in modelling various server/network configurations for a web application. I'd like to know in advance which parts of the system are going to be bottlenecks, and whether the bottlenecks ...
2
votes
4answers
191 views

As a small business, how can I host a static 500GB database in the most cost-effective way possible?

My company is building a database from a large publicly available data set. When we complete it, we will have something like 500GB of data, but the data will never grow beyond that. It takes ...
5
votes
3answers
254 views

Memcached Lagging

Let me preface this by saying that this is a followup question to this topic. That was "solved" by switching from Solaris (SmartOS) to Ubuntu for the memcached server. Now we've multiplied load by ...
-2
votes
1answer
830 views

How do I calculate my bandwidth requirements?

We have a facility that needs to upload approximately 20 3MB photos per minute to Amazon S3. These are coming from 10 different machines on our local network. We need to do this continuously for 16 ...
1
vote
0answers
74 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 ...
0
votes
1answer
302 views

Virtualbox development network using FreeBSD

I want to setup virtual network with 3 guest OS(FreeBSD) for testing scalable webapp. The first one should be only MySQL master server. Second and Third will be slaves with read only MySQL's and ...
-1
votes
1answer
169 views

Video Uploading on Amazon instances?

I am having real problems trying to wrap my head around my problem. I have decided on the middle and end solution to my problem but I can't seem to work out the the beginning of it. So as a bit of a ...
-3
votes
1answer
188 views

How do you host a big data web application? [closed]

Affordable alternative to Linode. I am using linode to serve my web application. The application serves, what I consider big data using ~ 30GB for our model US State and we serve a few hundred ...
1
vote
3answers
869 views

What would cause Memcached to Hang for 2+ seconds?

I'm going nuts trying to scale memcached. From their site: Memcached operations are almost all O(1). Connecting to it and issuing a get or stat command should never lag. If connecting lags, you ...
3
votes
2answers
489 views

Ubuntu scalable nginx mongodb mongdb memcached server configuration [duplicate]

I have been building a PHP web application using the following techniques in the past 2 months: PHP 5.3.4 MongoDB MySql I just got my dedicated server running Ubuntu 10.4 LTS x64 with the ...
6
votes
4answers
3k views

Ways to auto scale MySQL servers?

I run a site which has high traffic surges and because of that auto scaling solutions is very profitable for this case. Currently the web server is able to horizontally auto scale but the bottleneck ...
1
vote
2answers
1k views

Why doesn't IIS scale consistently?

I have a WCF service (written in .NET 4) running under IIS 7.5 on Windows 2008 R2 64-bit. I created a test tool that spawns 10-20 (or more) threads - each thread creates a random payload and hits the ...
4
votes
2answers
398 views

When you exhaust a 1 Gpbs connection to your main haproxy, how do you scale out?

If you exhaust your public network connection (say 1 Gbps) to your haproxy server that proxies requests to your backend servers, what options do you have to scale it out? Since all request traffic ...
2
votes
1answer
64 views

Availability & Scaling : Three Tier or Two Tier

I began working on a three -Physical- tier website (UI:MVC / Application:REST / DB), I've always considered that three tier is more scalable than two (taboo for high traffic websites), but lately i ...
4
votes
2answers
830 views

Scalable way to add users in Postfix without creating new unix/linux accounts?

What is the most scalable way to add new users in postfix? I don't necessarily want to create a new user in /etc/shadow just for email. I know I can use aliases but this does not solve the issue of ...
1
vote
1answer
118 views

unable to set up the ec2 ubuntu instance for auto scaling

I went through enough number of blog post which actually guides how to set up the auto scaling platform. I am using the Ubuntu ec2 32 bit AMI. From which I am trying to scale the instances, I am ...
0
votes
2answers
781 views

Unable to add the environmental variables and run “as-cmd”

I am running micro instance, now need to horizontally scale. I mean I am experimenting with a micro instance. I followed the instructions which is given in this video, but when I run as-cmd I get an ...
1
vote
3answers
214 views

Why is static page response time going up with increased concurrent requests

I don't understand the performance I'm seeing from apache. I would expect that more concurrent apache requests would perform better than fewer, up to a point, but beyond 3 concurrent requests, overall ...
0
votes
2answers
2k views

What is the reason for scaling Amazon EC2 by instance count rather than instance parameters?

We are looking into moving our website to Amazon EC2. The basic idea behind Amazon's cloud seems to be: "Need more RAM? You got it. Hard disk? Sure, here you go." Etc. But Amazon seems to be pushing ...
3
votes
2answers
1k views

Amazon EC2 AutoScaling WordPress

I am currently looking to autoscale my wordpress installation on Amazon EC2. Everything is working, I can bundle my EBS instance, put some policy and then amazon run automatically instances behind my ...
2
votes
1answer
620 views

Scalability 1-way. What does it mean?

I have read "Scalability: 1-way" in the specifications of a server. What does it means? The server is : HP ProLiant ML110 G6 TV X3430 2.40GHz 4-core 1P 1GB-U Non-hot Plug 250GB SATA LFF 300W PS
0
votes
3answers
220 views

Is it possible to rate limit based on host headers? i.e. not just on ip address

I have a web service endpoint that I am building where people will post an xml file to, and it will really get pounded with over 1K requests per second. Now they are sending in these xml files via ...
0
votes
2answers
204 views

How wordpress.com do scalability

Out of curiosity, I wanted to know, how Wordpress.com scale their architecture, specifically: how they handle sub-domains. I believe they have millions of subdomains.CMIIW. How do they scale their ...
-3
votes
1answer
163 views

How scalable is mySQL server? [closed]

I am debating on whether I should have three separate wordpress installs with three separate databases, or whether it would be okay to use multisite (which only uses one central db). I am concerned ...
0
votes
1answer
284 views

Memcached server: Is it a good practice to point two server urls to the same server?

I have a system where there are connections to a memcache server from several different files and servers. I would like to stay with one server but keep the option of increasing the number of ...
0
votes
1answer
553 views

nginx / node.js / postgres, scalability problems?

I have an app running with: one instance of nginx as the frontend (serving static file) a cluster of node.js application for the backend (using cluster and expressjs modules) one instance of ...
0
votes
1answer
643 views

What is the best Amazon EC2 server configuration for a highly-scalable distributed php application? [closed]

I'm creating a php application that needs to be able to scale up to "1 million users". I know this question is subjective to the application, but I'm curious what type of generic setups are a best ...
1
vote
2answers
313 views

Scalable Web Application Hardware Topology Best Practice

I'm working with an existing web application developed in Ruby with a MySQL back-end, but I think the generic hardware topology question will apply to a wide variety of server architectures. I'm ...
2
votes
3answers
302 views

Scaling Out SQL Server 2008 R2

I am looking into the possibilities of how to scale out the sql server 2008R2. simply scaling up wont be enough. "p2p replication" and "distributed partitioned views" look interesting, but both ...
2
votes
1answer
326 views

Suggested or Best practices for network architecture for ASP.net web application

Currently I have one server that runs an ASP.net web application (on IIS) and this is also running a SQL Server database. I am getting more and more traffic and soon I will need to increase the ...
0
votes
2answers
400 views

Why should one use amazon-elb?

Amazon-elb is a scalability solution that works like a proxy to several instances of my amazon ec2 servers. I wonder if it would'nt be more effective to have a roundrobin DNS to resolve my name into a ...
2
votes
1answer
913 views

I need nodejs and mongodb to handle 5000 requests per second

As the title suggested, I need nodejs and mongodb to handle 5000 requests per second. Right off the bat that is. We'll grow to many times that eventually. My initial thoughts are to put each on ...
3
votes
3answers
965 views

Database scalability with write-heavy application

I have a write-heavy application. The application is best compared to surveys - the customer creates custom questionares and this is saved to the database. Most of the requests are from their users ...
1
vote
1answer
327 views

Multiple AWS EC2 Instance with Single Database

Currently we are using One EC2 instance to run our Services. And we are planning to add one more instance to put our application Server. Is it better to put the database in separate instance and query ...
2
votes
2answers
2k views

Poor performance on Amazon RDS instance

I'm doing some load/stress testing on a PHP web application that is backed by a Small RDS database instance. When I hit the website with ~50 concurrent web requests, the RDS database just stops ...
1
vote
2answers
593 views

KVM on multiple servers

I'm using KVM for virtualization on a couple of Ubuntu servers but each physical server runs a bunch of VMs. Is there a way I can scale my VMs across physical servers? Does KVM support this? Is there ...
-3
votes
1answer
58 views

Doubts about best choices for a webserver [closed]

I have this config. Quad core i7 930 (x64) 6gb ram WEBSITE architecture php language for website mysql and it is possible the use of cassandra SSL protocol three hundred thousand visits (daily) ...
3
votes
3answers
136 views

SQL Server 2008 Enterprise edition 64 bit scalability

I am currently running SQL Server 2008 64-bit Enterprise Edittion on a VM ware environment with 4 CPUs and 32GB RAM. I want to scale it up. Is there a limit on how many CPUs and RAM I can go up to? I ...
1
vote
0answers
120 views

Browsers can't handle the real time updates my app is sending, slows everything waay down

Posted this a couple days ago, have made some more progress. Thanks for the help, this is delaying our launch and I'm under a lot of pressure. UPDATE: I don't think it's the server side, I think ...
3
votes
2answers
813 views

Is Amazon EC2 for me?

I'm working on an image hosting website tailored to a particular niche. The website is made with Django. I'm currently planning to run it on Linode. So far so good. The problem is: I will need to ...