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Questions tagged [round-robin]

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Nginx round robin after N requests — server weights, other solutions?

Suppose I have 4 servers and I'd like to send the first 10 requests to the first one, and then send the next ten requests to the second, and so on. Unweighted round robin would send one request to the ...
0
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1answer
80 views

Round-robin outgoing TCP requests between multiple Ethernet adapters on Windows

I have a Windows Server Standard with 3 Ethernet adapters. I am running a C# application that makes TCP connections to another server. Right now they are all made via the adapter that has a default ...
0
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2answers
168 views

pdns - using LUA records

Id very much like to do this but it doesn't seem to be enabled on my installation. # rpm -qa | grep pdns pdns-4.1.5-1pdns.el7.x86_64 pdns-recursor-4.1.7-1pdns.el7.x86_64 Ive tried both iterations in ...
0
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1answer
15 views

Bonding SWITCH XS (incoming packets)

I would like to bound 2x10Gb/s of a Linux server to receive/inbound more than 10Gb/s on a virtual interface send by a unique client. The client will probably send more than 10Gb/s (probably bonded ...
2
votes
2answers
592 views

Network bonding modi balance-rr / 802.3ad layer3+4

What is the difference between balance-rr and 802.3ad with xmit_hash_policy set to layer3+4 https://www.kernel.org/doc/Documentation/networking/bonding.txt This algorithm is not fully 802.3ad ...
13
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5answers
11k views

DNS Round Robin: Do browsers stick to one IP as long as it is online?

How do most browsers behave if they get multiple A-records from the DNS server? Do the stick to one IP as long as it is reachable (and only use another if the IP is down)? Or do they switch all the ...
0
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1answer
83 views

NetScaler prioritizing faster hosts in round robin

For a NetScaler load balancer running SSL passthrough, is there any aspect to the round robin load balancing algorithm that would direct more traffic to hosts that respond more quickly? As a ...
0
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2answers
358 views

How does aws elastic route requests via round robin?

I am looking at graph which shows CPU load on EC2 instances. I spot that when for 1 EC2 CPU increases for 2 it decreases at same time. After some period (5 minutes) they changed that 1 decreases and 2 ...
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4answers
196 views

How to setup a Route 53 DNS record in front of three other records?

I have a zone in Route 53; let's call it example.com. I have three A records in that zone: server1.example.com --> elastic_ip_1 server2.example.com --> elastic_ip_2 server3.example.com -->...
-1
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1answer
374 views

Iptables round-robin through multiple virtual network interfaces

I have a server with two main network interfaces and 5 virtual interfaces like this. eth0 - 192.168.1.1 eth1 - 192.168.3.1 eth1:2 192.168.3.3 eth1:3 192.168.3.4 eth1:4 192.168.3.5 eth1:5 192.168.3.6 ...
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2answers
343 views

Can nmap scan/test all answers from round-robin dns?

I have a round-robin dns record I want to test with nmap, currently it only tries one of the IPs (if I run a loop it checks each in order). Is there a way to have nmap test all A/AAAA records from a ...
0
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1answer
6k views

round robin dns in windows server not working

Running Windows 2012 R2 Round Round enabled for my DNS zone (AD integrated) Im either not understanding this or its not working. I want to use round robin dns to resolve to a cluster of servers. ...
1
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1answer
85 views

Does anycast allow for alternate routes to be attempted?

A bit of a bodged up title but I don't know enough of the subject to come up with a more suitable one. I've read time and time again that anycast is a great solution for load balancing and is the ...
0
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1answer
458 views

Sharing connection status between multiple HAProxy

I need to upgrade our current infrastructure based on a single server to a multi server one. Basically we run an HTTP app, MySQL and other services. My idea is to put HAProxy on all the servers so ...
0
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1answer
39 views

Issues to loadbalanced web servers in network when one fails

I have a network of one load balancer server (using nginx) lb1 which routes traffic between four web servers web1, web2, web3, web4. These four webservers are routed to using round-robin in nginx. ...
0
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1answer
884 views

How To Load Balancing on Bind9 Dns Server?

i have a DNS server running on ubuntu 14.04 - bind9 , because the server is hosted on t2 micro amazon free tier i don't think it can handle all requests that it will get , over 10000+ clients will use ...
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0answers
176 views

Windows remote desktop session host high availability login

I had Windows Terminal Server (WS2012 Standard R2), where everything worked as expected. After this I installed 3 more servers and did high availability with 2 connection brokers and 2 session hosts ...
0
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1answer
52 views

Load balancer questions

I have a website (ex: www.website.com) on aws that uses a large amount of streaming data (up to 10mbps / user). Lets say that my website is slowing down because the server simply cannot handle that ...
2
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1answer
1k views

Squid cache_peer round-robin algorithm not working as expected

I have number of peer-to-peer HTTP proxies and I need to distribute my requests among them evenly, so I added multiple cache_peer directives and set round-robin as peer selection algorithm. This is my ...
0
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1answer
274 views

Apache mod_proxy ProxyRemote to round-robin DNS - always the same subnet

I set forward proxy server using apache mod_proxy, which connects to 20 other proxy servers using ProxyRemote feature. You can set just one URL for ProxyRemote , in my case it's proxy.mydomain.com:...
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2answers
1k views

DNS Round-robin, Load Balancing, Load sharing, and failover in 2012

I have been reading many posts on serverfault as well as on other sites regarding all these. What I understand is, Multiple A records(round-robin dns) can be used for both : Load sharing (round-...
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0answers
339 views

DNS round-robin requests not distributed evenly

We have setup two DNS A records, where each points to a load balancer. nslookup ourdomain.com Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: Name: ourdomain.com Address: 52....
2
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1answer
227 views

Run different instances behind one load balancer?

When using Amazon AWS is it possible to run different types of instances behind an load balancer? Let's say as base instance you have an t2.small and when having some more load you want an t2.micro ...
0
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1answer
125 views

Is it possible to offer failover even using DNS round robin? [closed]

A company X has five ips to a given service. $ host www.example.com.br www.example.com.br has address 13.194.4.159 www.example.com.br has address 13.194.4.152 www.example.com.br has address 13.194.4....
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1answer
405 views

How the Haproxy roundrobin weighted algorithm works?

I would like to understand the load split in haproxy weighted method. For example server serverA site1.example.com weight 45 check server serverB site2.example.com weight 45 check server serverc ...
2
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1answer
513 views

bind zone file setup for dns round robin

I would like to set up load balancing for my website using DNS round robin. My DNS is managed by my own CentOS 6 server running bind. I added the following into my zone file: @ ...
8
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3answers
9k views

Is round-robin DNS a possible solution for high availability?

Let's say I have 2 IPs for a given domain (round-robin DNS). If one the IPs becomes unresponsive, will clients try to connect to the other IP? or they will just fail to establish comunication with the ...
1
vote
1answer
119 views

Setup an intelligent Round-Robin strategy

According to a lot of research - I discovered the design pattern Round Robin. It basically solves the idea I want to adopt. I want to have a pool with physical servers, each their own IP address that ...
0
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0answers
256 views

Load Balancing Nginx

Okay I have edited my question :) I would like to point all traffic at my dedicated server running Nginx and have that handle 70-80% of the load while also distributing the traffic to some other VPS ...
1
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0answers
857 views

Can stunnel be used to round robin tcp connections without SSL?

Today, I'm already using stunnel to provide SSL termination to a set of TCP services where the connections are round-robin'ed, this is done, for example, like follows: [myserv] accept = 443 connect = ...
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2answers
25k views

HAProxy with SSL and sticky sessions

We're trying to set up HAProxy (v1.5.1) to use SSL. While we managed to do that, we're having some issues with the round robin settings: We do want to have stick sessions, but haproxy seems to send ...
0
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1answer
784 views

round-robin director ALWAYS directs request to the same backend

I've set up one server with Varnish as a load balancer and two servers running nginx/unicorn/sinatra for demo purpose. All three servers are accessible! My varnish vcl file: backend web2 { .host = "...
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3answers
2k views

Pros and Cons of dedicated Load Balancer vs Round Robin DNS [closed]

2 Apache web servers with identical vhosts to serve a few hundred clients. RHEL 6 on all boxes. What are the pros and cons to having a load balancer with a VIP, and pointing all of the DNS A records ...
2
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0answers
2k views

Varnish 3.0.5 round robin director not balancing

I have an architecture with two varnish servers sitting in front of 5 webheads. Each varnish server is configured with a round robin backend director, but at times of moderate to high load varnish ...
13
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2answers
22k views

Is it possible to have round-robin DNS with /etc/hosts file?

Is it possible to have round-robin DNS with the follwing configuration in /etc/hosts? 192.168.4.10 shaakunthala.local 192.168.4.20 shaakunthala.local I'm on Linux.
0
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1answer
451 views

Puppet Master does not seem to be receiving certificate to sign from agent

I wanted to configure DNS round robin on my Puppet 2.7.23 Master servers. I configured 2 Red Hat 6.5 servers with Puppet running via Rack with Passenger on Apache 2.2.15 with mod_ssl. I configured ...
2
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0answers
129 views

Load balancing inconsistencies & AD server causing network crawl

We've configured a TS load balancing farm consisting of the Active Directory server which acts as the TS Broker and 6 Terminal Servers who are members of the farm. The load balancing is set to basic ...
0
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1answer
593 views

Load balancing of recipients email adresses on Linux SMTP servers

Background information: We are a provider of web-hosting and email (among other services) and we need several load balanced SMTP servers to fix all our customers needs. The problem: Every once and a ...
1
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1answer
138 views

Round Robin with single source

We have built ourselves an API and are busy scaling it. At current we have 6 hosts and we use DNS Round Robin to spread the load. However a lot of our traffic comes from single source. We plug into ...
0
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1answer
116 views

DNS Load Balance for Static Website

This is more of a educational question in comparison to a production environment. I have an AD environment with two IIS servers hosting the identical website content. For arguements sake lets say it ...
2
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0answers
1k views

How does Round robin policy of MPIO work in Windows 2008 R2

I have a Dell server with a 1G dual port iSCSI adapter. I have installed the NIC driver and using Microsoft iSCSI initiator, map few luns to both the ports and enable MPIO. The target I used was ...
0
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2answers
269 views

Using dual isp and static ip [closed]

what are the options to increase/backup bandwidth of a load balanced web farm gaining bandwidth from more isps? What are hardware/ip requirement to benefict from the 2 lines? http://s22.postimg.org/...
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2answers
653 views

How can I use multiple ISPs to increase bandwidth and redundancy for my website? [closed]

I have an HTTP server behind Microsoft load balancing. DNS is provided by the hosting provider. I want to increase the available bandwidth by adding another internet ISP. How can I ensure ...
1
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1answer
130 views

Can I Repeat Records in DNS Load Balancing?

I would like to bring up the load on a new server slowly over time. Unfortunately there is no front-end load balancer we can use to adjust this, so I just insert a new DNS record for the domain name. ...
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5answers
5k views

Weighted round robins via TTL - possible?

I currently use DNS round robin for load balancing, which works great. The records look like this (I have a TTL of 120 seconds) ;; ANSWER SECTION: orion.2x.to. 116 IN A 80.237.201.41 orion....
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1answer
582 views

Multi-level wildcard DNS matched by *.domain.com?

Q1: Does a DNS rule for *.domain.com match multi-level domain names? In other words, if I just set *.domain.com in my DNS records, will it match all of: a.domain.com b.a.domain.com c.b.a.domain.com ...
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2answers
219 views

Multiple DNS A records referencing the same host

If I create multiple DNS A records for the same hosts, for example: my-domain.com A 1.2.3.4 3600s my-domain.com A 4.5.6.7 3600s my-domain.com A 7.8.9.0 3600s Do queries really ...
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4answers
2k views

Avoiding 502 Bad gateway in a round robin webserver process restart

I have a load balancer/reverse proxy (either nginx or cherokee, does not matter which) deployed on my server and it points to multiple background webserver processes (either gunicorn or cherrypy, does ...
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1answer
1k views

Using Round Robin DNS on simple VPN setup

We have two internet connections which are load balanced to share the load between the two. We set this up after one of the internet provider proved to be less than reliable but great speed and ...
3
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2answers
4k views

PowerDNS CNAME with multiple A records produces unexpected results

This problem from what i can tell is isolated to PowerDNS. The servers are running two packages pdns-static-3.0.1-1.i386.rpm and pdns-recursor-3.3-1.i386.rpm on the most recent version of Amazon Linux....