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
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
4answers
123 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 ...
1
vote
0answers
59 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
votes
1answer
37 views

Run shell script on the event of “possible SYN flooding”

Since it doesn't appear to be possible to get "netstat" stats at the time I got an SYN flooding, I'd like to write a script that gets all the stats I need (top IPs, used memory, etc) and write to a ...
0
votes
1answer
46 views

Handle “possible SYN flooding on port 443. Sending cookies.”

My website constantly has several users online all the time. The server uses Apache/PHP, database and Memcached. On normal use, the application works well and fast. However, the server appears to ...
-3
votes
0answers
15 views

How do you build a server with scalable storage [duplicate]

I've been running a couple of web and mail servers for a while. However, I often get into hard disk space issues. For instance the mail servers often fill-up and I've to free-up space by moving emails ...
0
votes
1answer
71 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
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
97 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 ...
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 ...
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
2answers
151 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
199 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 ...
0
votes
2answers
37 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 ...
-1
votes
1answer
105 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
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 ...
0
votes
0answers
120 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
136 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 ...
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. (...
0
votes
1answer
492 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
1k 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
149 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
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 >=...
-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 ...
11
votes
3answers
631 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
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 ...
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
148 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
271 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
132 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
60 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
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. ...
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 ...
-1
votes
1answer
49 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
528 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
977 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
834 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
2answers
745 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
49 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 ...
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
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 ...
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 ...
-2
votes
1answer
70 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
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 ...
0
votes
2answers
255 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 ...
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
1answer
202 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?