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
97 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
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1answer
663 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
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1answer
310 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 ...
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2answers
619 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 ...
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0answers
75 views

RADWebAccess EventID 5 With Load Balanced Terminal Servers

We have a load balanced terminal server farm using session broker and DNS round robin to connect. We push the applications out to the users via a Sharepoint webpart. Every so often we get an error in ...
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2answers
513 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
555 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 ...
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0answers
82 views

ip_conntrack vs TPROXY performance

I'm currently trying to set up a high performance load balancer who - ideally - would be able to handle more than the ~65k connections that are possible without using a transparent proxy, with HAProxy ...
0
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1answer
103 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
369 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
49 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
329 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 ...
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0answers
76 views

Consume a soap webservice with Login / Ip authentication behind a loadbalancer

Currently we have 2 haproxy load balancer (active/passive) with a failover ip, and behind some apache servers. These apache servers need to consume a "soap" webservice of a client. Actually, the ...
5
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2answers
1k 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 ...
1
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0answers
294 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
106 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
72 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 ...
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0answers
69 views

How to understand httperf test results?

Using httperf, I've just performed several concurrency tests against a load balanced server (where each node runs nginx and the load balancer itself uses nginx as well). The data results of the tests ...
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0answers
53 views

Blitz.io reporting large number of timeouts - servers seem fine though

I'm using a web service called blitz.io (not sure how popular it is?) to test the reliability of my web servers under heavy loads. The command I'm using is as follows: -p 1-1000:60 -r ireland ...
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3answers
168 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
81 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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2answers
72 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
664 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
81 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 ...
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1answer
650 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 ...
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1answer
105 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 ...
0
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2answers
115 views

Random router load balance

It's my first GNS3 router configuration experience. There are 4 connected routers (they can ping each other). The routing protocol is router eirgp 10. This is result of show ip route on R4: D ...
0
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1answer
133 views

nginx upstream server path “backend.example.com/serverfiles/”?

I was wondering how to define server value in upstream to directory path instead of subdomain or port... for example this won't work : upstream backend { server backend1.example.com/**dir/** ; ...
0
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1answer
381 views

EWS: How to bypass the load balancer on Exchange?

I have an application that uses the EWS 2.0 Managed API to connect to Exchange. It works for one setup (single Exchange server) but isn't able to connect to another load-balanced setup. For the ...
0
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3answers
273 views

Varnish Server : How to put in-between Top Loadbalancer and Below EC2 Web Servers?

I'm still kinda novice but now i'm on AWS/EC2 Redhat Machines. I have: 1x Load Balancer (Above) 2x EC2 Apache Web Servers (Below) Something like: LB | ------- | | Web Web Then ...
1
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1answer
79 views

Drop non SSL packets on Linux

I would like to filter out all non-SSL based traffic for a specific port (443). Is there a way to do this with iptables, or another Linux application?
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1answer
50 views

Loadbalanced website what about emails?

Hi i have webshop and want to setup loadbalance with database on separate server, but what will happen when there is newsletter sendind mail. My modest idea is that those webserver wont know who is ...
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1answer
758 views

Cisco dual static default routes to WAN

I am trying to setup Dual WAN in our office because our single VDSL modem couldnt handle our web traffic any longer. So we now have two VDSL modems (Sagecom FAST2864) they cant go into bridge mode ...
0
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1answer
64 views

How to install pulse during RHEL 5.9 install

I am desperately trying to install pulse on a rhel5.9 machine. I have tried googling all over but all I get are instruction on how to configure pulse/piranha on an already installed box. I have ...
0
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1answer
240 views

Solr Replication without using zookeeper

The application that I am currently working on does not need real time indexing. I am using Solr as the indexing engine and I want to setup a High Availability Solr cluster with 2 replica nodes. Seems ...
5
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2answers
159 views

HAProxy not balancing server load fairly

HAProxy doesn't seem to keep the connections to the servers balanced. Keep this in mind: using HAProxy v1.3.26 5 equally balanced server specs algorithm is round robin, but no weights are applied ...
0
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1answer
37 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 ...
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6answers
228 views

Use two website hostings for better availability

I have two VPS servers from two different hosting companies. I want to make some fallback to second VPS if first is not available (preferably automatic). I understand that if I have a single ...
5
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2answers
145 views

Heartbeat Aware Load balancing

I am using Haproxy for load balance my web servers. Not all of them has same resources. Typical loadbalancing algorithms caused some low end servers to overload as LB isn't hearbeat aware. Is the a ...
0
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1answer
250 views

HAProxy and streaming server bottleneck concern

I am investigating into HAProxy to use as a load balancer for a number of nginx servers. Each server is streaming a static file (audio file) from it. Nginx will be using a symfony2 framework. In ...
1
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0answers
135 views

Setting up balancer-manager with mod_status on load balancing apache machine

I am setting up a Centos machine with Apache running on it for load balancing between two application webservers. Normally I would do all this with an F5 (or other hardware LB) but the customer is not ...
0
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1answer
82 views

Loadbalancing download server with nginx + haproxy

I need some info. I have been looking for this solution all over the google, but could not find it. I am trying to setup HAProxy to balance the downloaders in one server not send them to other servers ...
2
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2answers
482 views

Azure Load balancing internal instances of web/worker roles?

As far as I know Azure does not have a load balancer for internal services, internal endpoints are not load balanced. But can someone have implemented a "soft" solution, or can advice me some helpful ...
0
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1answer
93 views

How to use a load balancer with apache with php based applications?

I have found that i need to add another server to my setup but my web application is designed with php. Basically, in my application, there is a mkdir command that makes a directory for the user. If i ...
0
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1answer
115 views

Load balancing with DNSMadeEasy and Nginx as web server

I am planning to setup my web application in 2 different geographical locations with 2 application server replica in each zone. To load balance the application servers I am thinking of using ...
0
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1answer
675 views

Zen Load Balancer HTTPS to HTTPS

I've been struggling with an issue that I am hoping someone can help with. Basically, I have setup a working Zen Load Balancer going from HTTPS to HTTP but I am struggling with getting it to work ...
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1answer
295 views

Message Queuing vs. Load Balancing. I don't truly understand the difference [closed]

Help me to understand something. I've looked at several enterprise application architectures, and I've noticed that several of them use a Message Queue service, like ActiveMQ or RabbitMQ. I have ...
0
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1answer
452 views

Unable to configure haproxy with ssl

I want to make my server ssl protected, it has two parts one for website and another for application. to balance them we have used haproxy. Now we want to secure this haproxy. I have installed the ...
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2answers
179 views

What DNS servers to use with multiple connections

I have a complex configuration of multiple ADSL connections from multiple ISPs being load balanced by a Draytek Vigor 3300V+ My question is what DNS settings should I use. Should I use the ISP ...
1
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1answer
192 views

Reloading New Nginx Configuration With No Downtime

I have a Nginx server which constantly deals with high loads of requests. I want to be able to alter the configuration file of the server and reload it dynamically with zero downtime. I am running ...