Redundancy is the duplication of critical components or functions of a system with the intention of increasing reliability of the system, usually in the case of a backup or fail-safe.
Questions tagged [redundancy]
300 questions
0
votes
0 answers
Single isp dual failover links
I'm having a problem trying to configure my cisco 3945 router to use a dual hand-off wan links.
Lets say the ISP has provided the below ip addresses where they are doing hsrp at their end
ISP EDGE 1 IP : 192.168.0.1
ISP EDGE 2 IP : 192.168.0.2 …
Bhargav
- 87
- 6
0
votes
1 answer
Auto rebooting down servers
Currently have a web server VPS in Germany with Hetzner. They are offering free load balancer service. Thinking about cloning my VPS in their Finland site (meaning adding another VPS with cloned setup/contents) for daily backups that can also…
cvlo
- 1
- 2
0
votes
1 answer
Best way to mirror a large drive onto two smaller ones
I have an 8.0 TB Drive which will soon start filling up with videos
I have two spare 4.0 TB Drives
The system is running Linux Mint 19 Tara and is my desktop system (Yes it's a big system able to support 6 HDD in total)
What's the best way to…
Jesse the Wind Wanderer
- 113
- 5
0
votes
1 answer
Redundancy for a device with 2 NICs on same subnet reaching other networks
I have a Linux based device with two NICs:
NIC1 eth0: 192.168.1.100/24; Gateway: 192.168.1.1
NIC2 eth1: 192.168.1.101/24; Gateway not set
This device communicates with an Application Server (IP: 10.1.1.1). The application logic associates the device…
kuma
- 158
- 9
0
votes
1 answer
Ideal redundancy configuration for 3 physical servers running IIS and SQL Server
I'm looking to set up as redundant an architecture as possible to serve a data-centric web application with only 3 servers (only 5U of rack space). Between these two setups, which would be most ideal, and what kinds of pros and cons for each would I…
Paperjam
- 139
- 2
- 8
0
votes
1 answer
How to be a redundant with VMs on this middle infrastructure?
I need to implement for an association three virtual machines to manage the domain and two other software that will use databases. Of course they don't have a big budget but I am trying with their budget to implement something stable and available…
-1
votes
2 answers
High Available service - IP/DNS single point of failure
I'm looking for High Available solution for websites and already find
Kubernates , Docker Swarm ... but all these things should balance only webserver , db and other running service in the cluster. But what about the IP addresses DNS.
Let's assume…
DobriL DobriLov
- 33
- 6
-1
votes
1 answer
How many drives can fail in an Xserve RAID in RAID 0+1?
I’m torn between what I know (or think I do) and what Apple’s documentation states.
The hypothetical setup I’m considering is what is described as RAID 0+1 in Apple’s documentation for the Xserve RAID, which usually means a mirror of two striped…
kumowoon1025
- 101
- 1
-1
votes
1 answer
Backup DNS servers for a domain name - optimal configuration and troublehooting
Let's say we have these name servers for 1 domain.
ns.1.com
ns.2.com
ns.3.com
ns.4.com
backup-ns.1.com
backup-ns.2.com
How can I know which NS responded to this specific query, for example using dig? Taking into account DNS cache.
In a normal NS…
Mindaugas Bernatavičius
- 324
- 4
- 12
-1
votes
2 answers
Fallback between datacenters
What is the best way to do a fallback between datacenters. We have a dedicated server in one of the data centers and as our traffic increased i wanted to add more then backup i wanted redundancy and load balancing.
The thing that happened in the…
disi
- 1
- 1
-1
votes
1 answer
Need some clarification on a NIC functionality on a Dell Poweredge r610
Quick question. I'm trying to understand the NIC functionality of this server. NIC specs from manual:
My question is, do the two broadcom controller chips provide fail-over redundancy? For example, is it design intention that if a controller chip…
user1330287
- 197
- 1
- 2
- 7
-1
votes
2 answers
VM migration and IP address
When a VM offering a service is migrated to a different server is it an important requirement from the client applications point of view to retain the same IP the VM had before ?
For long lived TCP sessions it won't make a difference because the…
Manohar
- 229
- 5
- 10
-1
votes
1 answer
Distributed (serverless) Database System
I've currently a setup where 10 database clients access one (Postgres)-SQL server on the same network. The applications have a very low db footprint. They do load a few tables upon startup and do quite few operations during runtime (maybe 100 ops…
Hhut
- 133
- 6
-1
votes
1 answer
Teaming the 2 ports of a hp 361T pcie Dual port GB Nic
We have a network with two switches stacked for redundancy. We have a HO 36LT PCI-e Dual port NIC and an Intel x520 10GbE port adapter.
I want to be able to assign one IP address for both ports. I will one port to one switch, and the other port to…
DavyGravy
- 159
- 1
- 7
-1
votes
1 answer
What are common server architectures to build a reliable website
Sorry, if my question looks too general, but I am looking for an answers to specific problems that I listed below and would appriciate any help.
My website is growing in popularity and I would like to provide a consistant service for my users. Now I…
Temnovit
- 1,127
- 6
- 19
- 27