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
1answer
70 views

How much data can SQL Server handle without a DBA / other professionals?

We deploy clusters that use Cassandra, Elasticsearch and similar NoSQL technologies to index and process data. We go to quite some lengths to make sure we can consume and process records quickly. One ...
0
votes
1answer
21 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 ...
3
votes
6answers
3k views

Scalable WordPress Host for High-Volume Site? [closed]

I need recommendations for a scalable web host for a high volume WordPress web site. For my purposes, high-volume might be 100K-500K visitors/hour. Might think towards a 1M/hour burst rate as a "high ...
3
votes
2answers
2k 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 ...
0
votes
1answer
75 views

FreeRadius Scalability with multiple NAS worldwide

Our network setup consists of 5 network access servers in 5 different locations worldwide and it is expected to expand in the coming days to 15 network access servers and more in future. Currently we ...
3
votes
2answers
4k views

How to set up multiple web and database servers?

My websites have been growing in terms of traffic and the load on the mysql has been increasing. I wanted a solution that would help deal with the increased load on mysql (all queries already ...
3
votes
3answers
3k views

What are low, medium and high traffic websites in terms of visits? [closed]

We often read on the internet about big famous website such as Facebook, Google, Yahoo... having hundred of million of unique visitors each month. But what is the order of magnitude for smaller (or ...
0
votes
2answers
35 views

Is possible to have the same domain route to different servers without using subdomains?

I'd like to split my application up onto three different servers. This would make things a little more scalable. But I'm worried about using subdomains since it might mess with our SEO. Is is possible ...
2
votes
0answers
37 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 ...
5
votes
5answers
3k views

Apache on Windows in production environment? Why not?

"Everyone" know that Apache is for Linux/Unix and on Windows IIS is the way to go. However, I'm not a pro at Linux and it would be an enormous relief for me to use just the same setup in the ...
1
vote
0answers
21 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
2answers
136 views

Remote Desktop Services - Scale up vs scale out

I'm currently in the process of planning any required changes to an RDS infrastructure to cater for an upcoming increase in the number of users due to company expansion. Currently, the system only ...
3
votes
0answers
188 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 ...
-1
votes
1answer
91 views

How to scale Cassandra cluster vertically

I have a 3 node Cassandra cluster which I set up a year ago and it is getting quite slow now. It is much cheaper for me to scale vertically than it would be to scale horizontally ( I received free RAM ...
1
vote
1answer
106 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 ...
0
votes
0answers
121 views

Jetty horizontal scaling guide need

I am writing a web service with embedded jetty. I also want to use this example to test jetty horizontal scalability, but I don't know how to do that, and have no similar experience on horizontal ...
4
votes
4answers
1k 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
0answers
117 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
132 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 ...
22
votes
10answers
45k views

Running 100 virtual machines on a single VMWare host server

I've been using VMWare for many years, running dozens of production servers with very few issues. But I never tried hosting more than 20 VMs on a single physical host. Here is the idea: A stripped ...
8
votes
2answers
1k 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. (...
1
vote
2answers
201 views

Enterprise scaling - hardware & server tips

Things change when you are delivering to a large enterprise audience. What are the most important things to think about in relation to your server or server farm when scaling to a very large user ...
1
vote
1answer
1k 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
98 views

sql server 2008 scalability vs budget [closed]

I need to buy new server dedicated for Navision 2009 database. It's 50GB large and growing around 10GB a year. 16 user connected all day System: Windows 2003 R2 Standard 64-bit SQL Server 2008 ...
3
votes
2answers
482 views

Good Books About Scaling Up Databases/Servers/etc.? [closed]

I've applied for an internship at a startup company that expects its user base to grow by a large factor in a small amount of time, and so part of their project is to scale everything up so that they'...
0
votes
0answers
189 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
1answer
991 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 ...
7
votes
4answers
9k views

postgreSQL vs Cassandra vs MongoDB vs Voldemort?

Which database to decide upon? Any comparisions? Existing: postgresql Issues Not easily scalable horizontal. Needs sharding etc Clustering does not solve the data growth problem ...
0
votes
1answer
479 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 ...
11
votes
3answers
627 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
1answer
147 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
549 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 >=...
3
votes
1answer
719 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 ...
4
votes
2answers
4k 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
2answers
106 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
107 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 ...
0
votes
0answers
441 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
31 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
145 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
47 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
262 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
129 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 ...
-1
votes
1answer
59 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
1answer
131 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. ...
0
votes
4answers
32k 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 ...
7
votes
5answers
7k 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 ...
3
votes
3answers
130 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 ...
0
votes
1answer
811 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,...
-1
votes
1answer
48 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
3answers
900 views

google search engine architecture- how do so many concurrent users do a search on it [duplicate]

With millions of users searching for so many things on google, yahoo and so on. How can the server handle so many concurrent searches? I have no clue as to how they made it so scalable. Any insight ...