1
vote
1answer
22 views

Scaling a web application horizontally in Tomcat (load balancing / clustering)

I develop a simple REST-style web application consisting of 2 basic modules. Module#1: server exposing REST web services, stateless, deployed in Tomcat Module#2: REST client There is one Tomcat ...
-1
votes
1answer
60 views

separate mysql server and webserver and consequences [closed]

I have a web application. bought a pretty strong server for it. Server specification is below: CPU: DUAL E5-2620 RAM: 32 GB DDR3 HDD: 2 x 300GB SAS 10K Network: 100mbps/10TB internet. WebServer ...
3
votes
2answers
420 views

Nginx choose upstream depending on args

I need to two different sets of upstreams. But all my requests come from the same URL (same path). The difference is that some request will have a special argument and some won't. Depending on that, I ...
0
votes
1answer
53 views

How to evaluate if my Apache needs another server and/or load balancer? [duplicate]

I have an Apache web application which is serving ~2k Requests Per Minute. The current infrastructure includes two servers, one acting as Apache + database, and the second one just database. I'm ...
1
vote
2answers
633 views

Is it possible to balance load between multiple Nginx load balancers without using a hardware load balancer?

I plan to balance load between my app servers using a separate Nginx server as a software load balancer. But actually, it's because a load balancer in front of the app servers allows me to update an ...
0
votes
1answer
53 views

Amazon Web Service monitoring

I have deployed a web app on an AWS server. I have following questions: Monitoring my websphere app server status capacity monitoring? uptime thru Amazon CloudWatch metrics? Load balancing ...
1
vote
2answers
406 views

Transparent geographical DR website failover

We've already got webservers that are loadbalanced. And even though outages shouldn't happen, they do, for a variety of reasons. (central switch failure, misconfigured ISP routers, backbone failures, ...
2
votes
2answers
474 views

How does a geographically distributed web app handle stored data?

Hypothetically... I log in to a web app from Australia and change some data. In the US my colleague is using the same system and wants to view the data I've changed. How could the web app be deployed ...
0
votes
4answers
256 views

how to decrease web server load in linux?

we have a high-traffic dynamic web site that generates lots of database queries on each request and two or three linux servers for that , now I want to decreas the servers load I know squid reverse ...
2
votes
1answer
858 views

Nginx + Haproxy + Thin + Rails - 503 Service Unavailable -

I don't know how troubleshoot this. I get "503 Service Unavailable" http error for all "nginx upstreams" proxy passing calls to haproxy fast_thin and slow_thin ( server 127.0.0.1:3100 and server ...
2
votes
1answer
62 views

Assigning multiple public ips for a website

if we are having 3 webservers with same domain name and each with different public ip. Will this setup bring minimal load balancing. as we do a lookup of google.com it get resolved to 10+ ip.can this ...
0
votes
1answer
129 views

Stop Nginx from accepting new connections on error

I am running an nginx server behind a separate (L-4) load balancer that basically just serves static files and forwards requests to a downstream web server. This works great as long as all the ...
1
vote
1answer
256 views

Limit requests per minute in nginx

I would like to set a limit on the number of requests a single client IP address can make to my server, based on their IP address. Nginx has a limit_req_zone directive. However, this directive will ...
4
votes
2answers
183 views

Mongo database replicas on the same machines as load balanced webservers?

We're testing deployment of a web app on Amazon's EC2 which uses MongoDB for the database. Mongo recommends using at least 3 nodes for replication for data integrity. Although this is testing, we'd ...
5
votes
4answers
520 views

Is there an advantage to load balancing using multiple VMs all on the same hardware?

Some collegues are suggesting a web load balancing schema with multiple web servers (IIS7) on different virtual machines all running on the same hardware. Is this a truly advantageous setup? All ...
1
vote
2answers
470 views

IP Level Failover for Web Servers With BGP (Am I Insane?)

I've considered using Round-robin DNS failover, but due to various levels of DNS caching, you run the risk of old records pointing to a down site. If I own my own address space and AS number, in data ...
2
votes
1answer
2k views

A lot of errors 400 access.log with Nginx and loadbalancer

Hy, I have juste install nginx for my website, and everything is working well and very fast :) But i have this kind of error in my access log : IP - - [30/Dec/2011:11:06:00 +0000] - "-" 400 0 "-" ...
1
vote
2answers
735 views

Trying to limit requests in Nginx per URI

I find myself needing to limit the number of requests a particular IP can send for a particular URI (e.g. www.foo.com/somewhere/special) while leaving the rest of the site unregulated. How would I ...
2
votes
1answer
4k views

haproxy as load-balancer and nginx as webserver? [closed]

EDIT: I'm interested in high availability, performance server setup. I read a lot of articles about haproxy vs. nginx vs. apache etc. and this was my conclusion: haproxy is better load-balancer ...
3
votes
3answers
343 views

is it worth to use load balancer on web server/website

I have a website and a while ago, the web server of the company hosting my website was down for about a day. I consulted the company for a solution on how i can stop this from happening in future and ...
1
vote
2answers
345 views

How is a User Agent passed along from a load balancer?

I have an application that sits behind an F5 load balancer. The application needs to be aware of the User Agent and IP address of the inital request. For example: User Agent: Mozilla/5.0 ...
0
votes
2answers
59 views

How do I create a webserver that has a higher capacity…?

Hypothetically speaking... I have a website that is becoming quite popular. It is a fairly simple site, written in PHP and connecting to a MySQL database. The server it is hosted on has a top-notch ...
2
votes
1answer
118 views

Basic understanding about load balancer

I am running a http webserver that is connected to a backend database. Now if a client generates 100 threads and tries to contact that webserver through a loadbalancer, I get around 32ms delay. But ...
4
votes
4answers
3k views

Load balanced Drupal servers: a good way to share data among the servers?

I'm trying to get an overview of how i would go about creating a load balanced web server setup. Setting up the actual load balancer and adding two or more web servers seems fair enough. However, I ...
1
vote
4answers
925 views

Proper way to load balance a site across two locations

I have discussed a scenario here that our company is using and would like some input if possible. We have a main url for a site, call it "http://www.site.com". At some point during its inception, it ...
4
votes
3answers
1k views

Using Load Balancer in Rackspace cloud for website HA

I have tested tomcat specific clustering with apache mod_jk and mod_proxy on ubuntu local VMs for our website high availability and load balancing. The real servers are hosted by Rackspace cloud ...
0
votes
3answers
207 views

Reduce delay caused by load balancer

I currently am using mod_proxy_balance in Apache for load balancing. I have a client emulator which creates 100 threads and emulates user activities like browse the website. I tried making the client ...
0
votes
2answers
80 views

How is load balancing important for a web application?

I am planning to launch a new web application and I expect a good number of visits, so is load balancing beneficial? In what scenarios it is beneficial?
1
vote
1answer
1k views

haproxy domain routing

I am trying to set up haproxy to route to backends depending on the the subdomain that was used in the http request. Eg I have a regular web server running on port 8000 and an application server ...
3
votes
2answers
841 views

Understanding down-sides of network load balancing with two computers vs traditional three-way load balancing

We have one site on IIS build in ASP.NET with DNN. Currently we try to configure network load balancing for two servers. The service hosting provider told us this would be enough, but we seem to have ...
0
votes
1answer
153 views

Internal server error

I was trying to use the mod_proxy_balance module of apache to setup a loadbalancer for 2 webservers in the background. I thought I successfully did. Here's what happened: My proxy is in abcd.edu. I ...
1
vote
1answer
271 views

Large-scale server architecture [closed]

Recently I am on project that would need large scalability. Now, my architecture consists of 4 servers - 1 load balancing server, 2 application servers and 1 database server. What are the best ...
2
votes
5answers
979 views

How can I serve a static landing page if my server is down?

I would like to fallback to a static webpage if my main web server is down (currently a Rackspace Cloud instance). This would be a sort of worse-case scenario that shouldn't happen, but has before ...
1
vote
1answer
114 views

Load balancing a simple website (Apache)

I have two webservers colocated in the same place. Currently only 1 is active and it hosts a online forum, but it's biggest use by far is serving large binary files to a couple hundred thousand ...
0
votes
1answer
796 views

nginx as load balancer to nginx webservers

I am trying to set up a software based load balancer with nginx. Before I install heartbeat and pacemaker, I have created a CentOS virtual machine and installed nginx on it (lb-01), which will serve ...
3
votes
3answers
1k views

Best way to keep 2 or more IIS installations in sync

The front-end of our set-up runs via:- A Linux load balancer - running HAProxy for load-balancing with stunnel in front for SSL connections. This serves 2 x Windows Server boxes running IIS 7.5 I ...
3
votes
5answers
1k views

redundant http load balancer

Got a simple scenario with two web servers for redundancy and to scale. But how do I make a two web-server setup fully redundant? I can think of two solutions; two web servers, one load balancer ...
0
votes
6answers
2k views

which is the best webserver for serving static content and load balancing?

I was wondering which is the best webserver that would be able to server static content with the highest performance, and also is able to perform load balancing. I looked into apache, lighttpd, ...
1
vote
3answers
152 views

Single web app, multiple web servers

I have a problem of load balancing. We developed a web app for nearly 1500 users. As the number of users increased we are unable to serve the requests in a timely manner. It takes around 10 to 20 ...
2
votes
4answers
2k views

Zero-downtime availability in a web-serving frontend on EC2?

We have a web application with low load but high availability requirements. It consists of a single front-end load balancer and a couple back-end servers. The load balancer is there primarily for ...
0
votes
3answers
56 views

Does multipurpose node is a good thing for scaling?

I have a web app with different tiers: database for persistence a couple of web servers(mongrels) load balancer Now it is all running on the same host. But how can I add another server to handle ...
0
votes
1answer
360 views

Is there a free/open source load balancing software I can use?

I need to do some load balancing testing on a website. Are there any free programs out there I can install and start using in a windows server 2003 environment? Thanks, Paul
1
vote
6answers
1k views

Benefits of Gigabit uplink for high traffic webserver?

My question is if our webserver would benefit from having a faster network connection, even if the current 100Mb/s connection is not maxed out. Our webserver is serving around 1.000.000 dynamic ...
1
vote
5answers
3k views

Scaling Up NFS-Mounted Web-servers & Online File Storage

So, few months ago my boss throws at me "what happens we needed to scale to X clients, in a reasonably short period of time." sort of scenarios, somewhat of an engineering challenge if anything else, ...
0
votes
1answer
205 views

Multi-web server setup, how to direct traffic to closest server

I serve a dynamic javascript file (a PHP file that echos javascript) from my webserver to thousands of websites (mainly in the USA). I want to speed things up by adding a webserver on the east coast, ...
0
votes
2answers
134 views

Issue in implementing a stateless server Of a facebook application

I am trying to implement a stateless server. I'm using LAMP with Php but when I connect to the facebook server using facebook connect. Wouldn't it return a facebook session to me which my server will ...
0
votes
3answers
286 views

Can I use two different servers for one site? how?

Is it possible to use two servers (or more) for the same site, and with different data? For example server1 has page1.html, and server2 has page2.html and they both can be accessed from www.site.com. ...
2
votes
2answers
1k views

Network load balancing, efficience and limits?

I'm about to study about NLB on Windows Server 2003. It archives both of my interests now: scalability and high-availability. But I don't know about its power in production environment. Is NLB a ...
2
votes
3answers
3k views

High-availability and load balancing on IIS?

I need to study about high-availability and load balancing of a web server. My choice was IIS, cause of I'm familiar with it. I have some questions to ask: Which is the first version of IIS that ...
0
votes
1answer
168 views

Perlbal Reproxy with Remote Host

why would perlbal's reproxying give me a 503 for any remote url? X-REPROXY-URL: /path/to/a/local/file.jpg = working X-REPROXY-URL: http://a-public-file-in-an-s3-bucket.jpg = HTTP 503 my perlbal ...