Load balancing deal with the techniques involved on using multiple systems to deal with high demands, balancing the load between those multiple systems. Questions deal with networking and server load balancing, using dedicated hardware or not.

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1answer
353 views

Trying to setup transparent, load balancing, SSL reverse proxy. Is it possible?

I've done a few weeks worth of research on this topic for a project, and unfortunately I'm a simple code monkey, my knowledge of networking and SSL are limited. Pretty much every search I've done so ...
1
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2answers
730 views

Failover for server with dual WAN

I have one mail server, one SonicWall firewall, two Internet providers, and an internal DNS server. I have WAN failover set up on the SonicWall so in the event that the primary connection is down ...
0
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1answer
162 views

How to implement High Availability easily?

I have a website that is currently hosted in a single DigitalOcean region. DO are great, but occasionally they have routing issues in a region and the website goes down. The stack is very simple - a ...
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2answers
142 views

Load balancing across uneven links (Cisco\OSPF)

I know that OSPF will load balance across equal cost paths such as: R1 ------------------ R3 | 100mbit | | | | 1gbit| |100mbit | | ...
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0answers
49 views

Django, fastcgi, loadbalancing extremely slow

I experience alot of problems with Django and I would be very grateful if you could help me: I run a lighttpd as a loadbalancer with the following settings: $HTTP["host"] =~ "myproject$" { ...
0
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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
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1answer
74 views

MongoDB Balancer

So I have 2 sharded clusters with 3 servers each.My mongos is running, my config server is running and ive also added test data to 1 of the 2 shard clusters. I am having trouble getting that data to ...
1
vote
1answer
104 views

Loadbalance UDP traffic with session affinity and way to take servers in & out of rotation [closed]

What is the best way to go about load balancing UDP traffic among a whole bunch of servers, while keeping session affinity based on the users' IP? I need to also be able to take servers in and out of ...
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3answers
114 views

is this network structure viable?

I would like to know if this network structure it would be viable or not. The main reason it would be to be able to switch manually, the ISP. If one is going down than use the other one. as I know ...
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1answer
188 views

Nginx upstream automatic weight

We have been using nginx as a reverse-proxy for a php farm, with "manual weight settings" for upstream hosts. The maybe 30 php backend servers are of wildly different power. We cannot change that. We ...
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0answers
42 views

Cisco configuration for public library internet

I'm a C/C++ computer programmer turned IT support guy working for a public library. My day is usually spent helping random grandparents learn how to use email, so my networking knowledge is limited ...
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0answers
118 views

Drop in HAproxy traffic with increase in connections

We have an intermittent issue that involves a severe drop in network traffic (both IN and OUT) on our HAProxy load balancer. It happens a couple times a day. HAProxy is configured to limit requests ...
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1answer
40 views

Is there a way on the server side to punish evil visitor? [closed]

For example an admin page that should not be visited unless with special cookie or query string token. The point being that anyone who tried and failed would likely be with bad intention. Or when the ...
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0answers
108 views

Is it possible to persist a session after a server as been removed from a load balanced server pool on an F5

We have a server farm hosted in a co-location data center, because of uptime SLA's in our contract we have zero access to the F5 Load Balancer. I am curious if the following is possible to achieve. ...
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0answers
125 views

Changing Cassandra Tokens on 1.2.1 From 4 to 256

We initially started our cluster using one datacenter, one rack, and the Simple replication strategy. We have keyspaces with several hundred gigabytes of data. When we changed the tokens in the ...
1
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1answer
112 views

Load Balancer sftp persistence when a server goes offline

Let's say we have the following scenario: We have two identical *nix servers using a shared filesystem. We connect through SFTP (not FTPS) to one of them to upload a file to the shared filesystem, the ...
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0answers
134 views

Can keepalived use a dedicated NIC for VRRP traffic only?

I have a pair of Linux load balancers for a single VIP, 10.13.10.227. They run keepalived and haproxy. They are connected directly to each other (no switch between them) on each other's eth3 and have ...
1
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1answer
34 views

Network Load Balancing Manager failover

I would like to be notified when one of my clusters in Network Load Balancing Manager starts up or fails. The documentation seems to infer that there are no advanced scripting, logging, or ...
0
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1answer
246 views

Load balancing and failover for streaming solutions

I have a content distribution system which most of the time delivers VOD and audio. However, recently we have also moved into the live-streaming business. This however has raised a few issues ...
0
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1answer
736 views

nginx geo location module configuration using geo database?

I've setup nginx as a reverse proxy for a couple of apache backend/upstream servers. Using the GeoLite database from MaxMind, I'm trying to loadbalance requests between the two servers dependent on ...
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0answers
178 views

How to tell uWSGI to prefer processes to threads for load balancing

I've installed Nginx + uWSGI + Django on a VDS with 3 CPU cores. uWSGI is configured for 6 processes and 5 threads per process. Now I want to tell uWSGI to use processes for load balancing until all ...
1
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1answer
144 views

How can our customers use our SaaS with their own SSL certificate?

We offer software as a service that is fully hosted on Amazon Web Services (AWS). We mainly use Elastic Beanstalk (elastic load balancer + ec2 instances) and RDS (database service) plus many other ...
2
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2answers
277 views

Load Balancing UDP traffic transparently

Are there any products (preferably open source) that can load balance UDP packets transparently? We need to scale our syslog servers and require the original source IP be kept intact. Alternatively ...
2
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3answers
179 views

Can I balance load between 4 ADSL links

I recently began to work in this organization, we have 4 ADSL separated links, so the people connect to the nearest WiFi, resulting in usage inequality. I was about to change the links to a fiber ...
0
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1answer
638 views

Setting up a load balancer using Apache 2.4

I'm trying to setup a load balancer with Apache 2.4 but I can't make it work. Here's what I wrote in my http.conf file: <Proxy balancer://pop> BalancerMember http://pop1.local/ ...
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0answers
213 views

Can I forward my godaddy domain to Load Balancer DNS' name?

My domain is hosted on GoDaddy. Is it possible to forward my domain to LoadBalancer's DNS? Example steps: Add Domain Forwarding on GoDaddy Forward to: ...
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0answers
682 views

How to Configure TimeOut For AJP connector

I am using ajp connector to connect to J BOSS nodes from Apache, ajp is configured to accept 400 concurrent connections by setting max Threads to 400, but few my connections are getting timeout. Where ...
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1answer
58 views

AWS Load Balancing Same Server Different Port

I am just curios and probably the answer in no. But I was wondering if it is possible have a load balancing that listen on 1 server instead 2 or more and redirect the traffic on different ports?
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0answers
108 views

Apache Load Balancer With JBoss

I have Apache acting as a load balancer in front of 5 JBoss nodes. When I put a load of more than 200 concurrent users on the environment through my load testing tool, my response times are going ...
1
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1answer
105 views

Beginner at load balancing. How would I load balance multiple servers on different racks?

I was wondering if I had the right idea for load balancing lets say more then 42 servers. Would it be like this: As an example I'm using a performance Load Balancer with 10gbps input and lets say ...
2
votes
1answer
835 views

Is possible in Router Load Balance TP-Link TL-R470T+ use always same WAN (WAN3) for specific port

It is possible that all the traffic that pass through the port 25, goes by the same WAN interface? My router is http://www.tp-link.us/products/details/?categoryid=&model=TL-R470T%2b
0
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1answer
355 views

keepalived doing a lot of TCP DUP ACK and TCP Retransmission

I'm trying to replicate the setup our hosting provider have done for our load balancer, which is using keepalived. So I have one "load balancer", running CentOS 6 and keepalived 1.2.7, with two Web ...
2
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2answers
839 views

Graphite/Carbon cluster returning incomplete data

Trying to setup a Graphite/Carbon cluster. I have an elastic load balancer that directs traffic between two nodes in my cluster, each with one web app, relay, and cache. In this example, I sent 1000 ...
3
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2answers
781 views

EC2 Update my existing AMI

I'm using Elastic Load Balancing to load balance my Auto Scaling Group, for that I have a private AMI that hold my application server (Tomcat) and my web app deployed to it as war ... Now everything ...
1
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2answers
636 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
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1answer
110 views

How to setup a load balancing / fail-proof web server under Linux [closed]

the company i work for currently has 2 linux servers running under Debian that are being paid for. One of them currently hosts multiple websites + mail services as well. The other linux currently is ...
0
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1answer
548 views

How does the Cisco Global Site Selector pass traffic?

I have reason to believe that the Cisco GSS 4400 Series behaves differently from Cisco ACE NLB's, in regards to the way they pass name references. I would like to know the details of how they differ, ...
0
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1answer
58 views

Is a reverse proxy useful behind a load balancer and IPS

We have a Web infrastructure with a farm of Web Servers. They are behind a loadbalancer which does SSL offload. We also have a IPS and obviously a set of firewalls. Now, for security reason we have ...
0
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1answer
374 views

Apache with mod_jk with glassfish instances, large number of established connections for low number of users [duplicate]

I making a tuning for our production servers for a portal, we have 4 servers, 2 for web and 2 for app, and there is a firewall before and after web servers (so yes there is a firewall between app and ...
5
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2answers
2k views

What algorithm does Amazon ELB use to balance load?

I found this in the official ELB documentation By default, a load balancer routes each request independently to the application instance with the smallest load. but an article on Newvem says ...
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0answers
330 views

High latency on domain with CDN

High latency on domain with CDN I have problems with latency on my server, these are the tests I made with blitz.io Latency album http://imgur.com/a/bCmwo I would uploaded images here but it ...
0
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1answer
115 views

Load balance by header prefix

I need to balance an OAuth application. By using the Authorization header, I can redirect the same client to the same machine - however - I want to redirect each user to the same machine, regardless ...
0
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1answer
91 views

Are balance-xor and 802.3ad modes of Bonding meant to provide per-flow balancing?

The title says it all :) Well we have 2 links, one is 1MB (CIR/ dedicated), the other is 12MB (shared). 12MB one is not at all reliable too.. So what I want is to not lose my packets into the ...
2
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3answers
198 views

Is there a way to redirect an IP to another IP on Amazon EC2?

We're migrating our deployment from regular EC2 into a VPC, we have two load balancers in the public cloud that we have a number of domain "A" records pointed at, however I didn't realize that a ...
0
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1answer
93 views

High-traffic, low disk utilization AWS solution [duplicate]

I've got a high-traffic (imagine tracking server) node.js server that's going to run on AWS EC2. There is no disk operation involved, but a lot of DynamoDB requests (in same zone), ElastiCache usage ...
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votes
2answers
73 views

How should I host a website with infrequent, planned load spikes? [closed]

I have a smallish site which I expect to have extremely high concurrent traffic for a few hours each month. I'm trying to work out what hosting solution will ensure the site never goes down. Here are ...
0
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1answer
841 views

Blocking repeated http requests in Apache behind a load balancer

I have a number of EC2 servers on AWS running apache behind a load balancer (ELB). Every now and then some IP address abuses the API hosted on the EC2 servers and causes a denial of service. I have no ...
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0answers
96 views

Linux IPVS in DR mode: VIP unreachable for director

I use direct routing mode. How do I make the loadbalanced service available to the director (DIR) using the virtual service ip (VIP)? When I try to connect from DIR to the VIP, Linux (3.2.0) sees ...
7
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1answer
832 views

F5 Load Balancer Resends Request On Timeout

Let me preface this by saying I am not a systems administrator, I'm a programmer. Recently, our systems administrators installed F5 load balancers. Since then, I've noticed that any time a request ...
-5
votes
1answer
112 views

Loadbalance between Heroku and AppHarbor? [closed]

How would you set up simple redundancy between these 2 "cloud" providers? Does a DNS fallback seem reasonable (that would update records when one is down) or would it take too long to propragate the ...