I am hoping someone can give me some help, as I am pretty new to Nginx. Thanks in advance.
Premise:
I have a load balancing server (nginx upstream) in a test environment, load balancing between two web servers. I use the fail_timeout parameter because, if one server goes down, I cannot have it re-introduced until I have manually intervened, due to data integrity issues between the two.
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-robin, but NOT load-balancing).
What are some load balancers that has this algorithm (Minimum Expected Delay or Shortest Expected Delay)?
Are there any theoretical studies that might support this algorithm like equations for the delays between users to the NLB and to its server farm?
P.S. I'm trying to make a simulation tool for network load balancers..
Currently, I have nginx > 25 x nginx + fcgi
The main nginx, does the load balancing and each virtualhost listens to a different ip (different products).
some of the ips receive different hostnames, and they get rewritten back to the backend servers like:
...
Trying to decide between these two configs:
Nginx -> HAProxy -> Apache servers
Nginx -> Apache servers
I'm wondering what benefits there are of using the first configuration over the second. I've heard that HAProxy is better at load balancing than Nginx but wasn't able to find any specifics.
Also, how much of a performance difference is there between the first and second option?
I have a Cisco WAP4410N AP device.
Since yesterday, it is supposed to serve a network of about 15 (max 20) clients at the same time, but not all clients will be using bandwidth simultaneously, since it's a mixed network of notebooks/tablets/smartphones.
Please correct me, but my understanding is that with software load balancing a service must be run on each server while there is one DS that notifies the other servers that a server has gone down and that they should consume that servers load.
With hardware load balancing what happens in a fail-over? Could someone explain?
Hello to all Server fault users,
I am new to this website but have constantly been using the mother website, stackover flow.
Well to begin with, i would like to design a load balancer for the organization i am working for.
As i am very new to this whole, idea about load balancing and networks.
I need to provision machines as a load balancer (probably using HAProxy), now the question is
Does a machine with 512MB/2CPU cores suffice?
Is load balancing more RAM or CPU intensive (or both)?
What's a good configuration for a LB machine?
Email this page