In computing, failover is automatic switching to a redundant or standby computer server, system, or network upon the failure or abnormal termination of the previously active application, server, system, or network. Failover and switchover are essentially the same operation, except that failover is ...
1
vote
2answers
448 views
How do I do IP Failover for my Public IP address with Linux HA
I did a lot of experiment with heartbeat, corosync and pacemaker for IP FailOver which I have to do with Public IP. I did more than one ip failover(VIPs) with two nodes, also with three nodes BUT ...
1
vote
4answers
239 views
Are there any open standards for server failover?
I'm building a client-server application and I am looking at adding failover to the client so that when a server is down it will try to connect to another available server. Are there any standards or ...
1
vote
6answers
705 views
Server Failover Scenario
I've got two Dell PowerEdge 2950 servers. In order to (hopefully) eliminate any downtime, I must implement a solution to detect and adjust to component failures, environment failures, etc ... the ...
1
vote
2answers
91 views
One website, two public IPs, each IP on separate line, how to do failover
We have a website that sits behind two firewalls, main and failover. Main and failover firewall have different IPs, and different Internet connections from different providers. How to provide failover ...
1
vote
4answers
94 views
Just one client bound to address and port: does it make a difference broadcast versus unicast in terms of overhead?
Scenario:
I am implementing failed over for a network node, so my idea is to make the master node listens on a broadcast ip address and port. If the master node fails, another failover node will ...
1
vote
2answers
380 views
Several load-balancing servers listening on single IP/port?
Let's say I have a fully working, load-balanced application server environment.
All servers have to fail-over gracefully. It's relatively easy to do with the application servers, but how can I ...
1
vote
1answer
173 views
How to connect drive array to redundant motherboards?
How should one connect a small storage array, four 3TB SATA drives for now, to two motherboards or controllers as a failover system? This means avoiding adding another single point of failure such as ...
1
vote
1answer
97 views
Does dynamically DNS record updating works as a failover mechanism?
Simple Failover markets itself as:
continuously monitors your servers to find out which are up and which
are down, and then it dynamically updates your DNS records accordingly
so that your ...
1
vote
3answers
440 views
Windows Failover (100% Uptime for critical ops) Hosting Recommendations
I have been searching for a windows hosting provider that has a failover for 100% uptime, and I wanted to get your opinions and recommendations on this. Our software will be hosting mission critical ...
1
vote
7answers
491 views
Mirroring Drives
I'd like to mirror a drive between two windows servers for fail over/disaster recovery. I assume there is a software package for this. What do you use?
1
vote
1answer
111 views
Hyper-V Manager/Server failover/redirections
I have currently one Hyper-V Server 2008 R2 server installed, it's successfully running 4 VM's, but memory/RAM is starting to become sparse. I actually have a 2nd machine available, so my great idea ...
1
vote
2answers
332 views
High Availability without IP Failover?
Are there strategies or techniques to create HA environment when IP failover isn't available? I'm reading a guide at Linode's library which describes exactly what I want to do, but I'm not sure my ...
1
vote
1answer
280 views
Implementing Automatic failover with SQL Server 2008 R2 Web Edition
I am trying to implement automatic failover for an ASP.NET MVC website running on Windows 2008 R2 Web Edition / SQL Server 2008 R2 Web Edition. I know that this is not supported out of the box, but I ...
1
vote
6answers
2k views
Alternatives to DNS round robin
Sorry for being unclear previously.
We have a vmware virtualized server instance that is our main production server. I stores a series of web based applications on close to a hundred unique top level ...
1
vote
1answer
1k views
DNS Made Easy's DNS Failover, is it worth it?
I have decided to start using DNS Made easy for my external DNS but can't deside really if I should go for the $30 or $60/year plan. The smaller plan probably covers my current need as I only have 5 ...
1
vote
3answers
2k views
Bonding iSCSI connection Linux
simple Question: how can i utilize two or more ethernet interfaces on target and initiator to
have fail-over
to use bandwith of all interfaces
Answers?
My Setup: both systems run linux and have ...
1
vote
4answers
296 views
What is the better way to add extra servers for reliability in our case?
We have the following servers:
A. 1 x web server running MySQL (a forum).
B. 1 x web server running RT with Postgres.
C. 1 x web server running a home grown app with MonetDB as the backend
Now of ...
1
vote
2answers
749 views
Redis Master and Slave usage
While I know how to configure and run Redis master and slave on two different servers, I would like to whether my Webserver will be able to connect to slave redis server if the master redis server ...
1
vote
3answers
68 views
Building right system for my needs [closed]
I will be providing "File-Hosting" service and I need something that works with me along the line and allow the project to expand.
At first I was thinking about one big server with RAID 5 as a ...
1
vote
2answers
373 views
Linux server failover
I have two Linux servers (CentOS6) - both are identically configured connected to the same switch with a direct link between them. I only have one external IP that is assigned to eth0 on both servers ...
1
vote
3answers
2k views
How to configure ubuntu server with 2 NICs, and 2 Gateways (2nd as a failover)?
Here is a basic overview of the network configuration for one of our servers:
[Datacenter]
[Internet Connection #1] >> [Firewall 1 (xx.xx.xx.1)] >> [Server (xx.xx.xx.10)]
...
1
vote
1answer
188 views
Automating failover to recovery site using SRM (API)
i am looking for a product that could integrate with SRM (we support following HW vendors: NetApp, EMC, Hitachi, Eternus and HP) and allow automation of failover from primary to disaster triggered by ...
1
vote
6answers
381 views
Copy database with Sql Server 2005
My situation is as follows:
I have a production Sql Server 2005 database. Once a day I want to duplicate this database to another failover database which is on the same server instance. I don't want ...
1
vote
3answers
5k views
Minimum hardware requirements for Windows Server 2008 Failover Cluster
Let me state up front that my background is software development. I apologize for any dumb questions in advance.
I've been tasked with putting together the specs for hardware that will support a two ...
1
vote
3answers
1k views
Proxy failover solution?
What would be http/ftp proxy failover solutions using open source tools?
I have one squid proxy server on virtual Linux server and need to make a failover server on another one. Proxy must be ...
1
vote
1answer
327 views
Fail-over VPN with two ISPs and Cisco ASA 5500 Series
We have a couple of branch offices that need to connect to a main site.
We plan to use Cisco ASAs 5515 to establish VPN connections. We would also like to have 2 ISPs at each location to make the ...
1
vote
2answers
80 views
High available and secure FrontEnd to WebApps behind a firewall [closed]
my question is about proposed implementation of high available and secure FrontEnd to WebApps behind a firewall. The components of the network and their relationships are as follows:
1) 2 WebApps ...
1
vote
2answers
182 views
How can I use a backup internet circuit for incoming services/applications?
Current:
Primary ISP - fiber
Backup ISP - DSL
We have various apps/services like VPN, email, etc. that come in on various external IPs on the primary ISP.
Is there a way without BGP peering to ...
1
vote
1answer
166 views
Akamai Website Fail-over trigger
My organisation currently has 2 data centres from which it hosts its corporate website, with Akamai providing load-balancing, and other CDN services. Now, I'm told that if our server stack in 1 data ...
1
vote
2answers
164 views
Dynamically re-route specific traffic on NIC failure in Linux
This is my first question on this forum. Hope I will be able to help others in the future.
I have two boxes with two NICs each. I know that using bonding I can have some degree of fault tolerance ...
1
vote
3answers
416 views
Can DNS do failover switch for a domain?
I have heard about round robin solution. But that one is making different request to different ips to do load balancing. What I want is making one IP as master, only if it dies, the DNS server switch ...
1
vote
2answers
221 views
SMTP/IMAP failover, filesystem options?
Given two hosts running SMTP and IMAP services, how would you best make them redundant so that one can easily take over if the other goes down?
Keep in mind there are no other servers where network ...
1
vote
1answer
321 views
What is the industry standard solution for linux web server and mac file server failover systems?
I am a web developer at my company and am therefore qualified to be an IT guy, apparently. I have a single Ubuntu web and file server currently, but I want to break up the server tasks onto two ...
1
vote
1answer
482 views
error_page doesn't seem to work with nginx upstream directive
I am trying to use nginx to load-balance a couple of downstream app servers, and to show a "fail whale" style page if all the downstream servers are offline or unresponsive. Unfortunately, the nginx ...
1
vote
1answer
226 views
How to build a hot swap server using Linux
I have a requirement wherein we have to provide servers with hotswap, i.e. 2 redundant servers running a set of applications and database (MySQL in this case) and one should take control when the ...
1
vote
1answer
485 views
“Simple” Failover to a Geographically Separated Server?
I've been reading about DNS failovers and a bunch of other technical terms however I'm a bit of a newbie in this so it all sounds Greek to me. Basically here's what I just need:
I have two shared ...
1
vote
2answers
2k views
Browser-based DNS failover using multiple A records
It has recently come to my attention that setting up multiple A records for a hostname can be used not only for round-robin load-balancing but also for automatic failover.
So I tried testing it:
I ...
1
vote
3answers
1k views
CentOS Failover Cluster - SIOCADDRT: No such process (when adding a loopback)
I'm trying to configure two web servers for a load balancing server. The load balancing aspect works fine (it sees both server, kills 'em if it needs to, and seems to direct traffic fine). The only ...
1
vote
3answers
567 views
Receiving a notification on a Cluster Group Failover
I have several Windows Cluster set up and I have the need of keeping track of failovers. I'd need to receive a notification of sort whenever a group fails over. I've seen some examples around, but I ...
1
vote
2answers
3k views
How to configure failover for JBoss AS 5?
I am currently an intern in my company. My boss basically wants me to perform a failover from a JBoss AS to another just for a proof of concept. Load balancing is not required as i am only required to ...
1
vote
2answers
500 views
Allow two servers to share an IP without using NAT in front?
We have outgrown the use of a single server for monitoring our network so we are looking to add another monitoring server. Unfortunately, we were shortsighted when we initially configured the hosts ...
1
vote
3answers
131 views
Best way to duplicate databases nightly?
We just got two new servers, that are running Windows Server 2008. The intent is to make the machines pretty much identical, copying the content of the master to the slave on a nightly basis, so that ...
1
vote
1answer
2k views
Failover or load balancing configuration on Apple Xserve and Mac OS X Server Snow Leopard (10.6)
I'm currently installing a number of Apple Xserve boxes running Mac OS X Server (10.6). After poking and prodding for a while I can't find any obvious way, or documentation telling me how, to set up ...
1
vote
3answers
245 views
Software for failover across multiple external hosts
I have multiple webservers with the same content, hosted across different providers. However, I can't seem to find a nice, simple failover solution. Load-balancing software (Pound, HAProxy, etc.) are ...
1
vote
3answers
202 views
Anyone have an example topography of an ideal shared/vps server setup at a colo/data center?
I am looking into options for building a data center at a colo for the purpose of using it as a place to host shared server websites, as well as virtual private servers.
NAS/SAN solutions, load ...
1
vote
1answer
27 views
VPN Failover Cisco ASA 5505
So basically we have a Cisco ASA 5505 (we have inherited this from a customer, none of us have any experience with Cisco's). Now essentially we have to WAN lines which we have setup in Failover, via ...
1
vote
1answer
35 views
Performance penalty when using CNAME
We are using the current CNAME record for a server, i.e.
foo.example.com => CNAME => server1.example.com
server1.example.com => CNAME => ec2-34-142-138-31.compute-1.amazonaws.com
...
1
vote
1answer
76 views
Bond0 Failover when link light stays up: High Availability Network
Configuration:
Two switches, each with a separate internet route
Centos servers with eth0 and eth1 bonded as an active-backup on bond0, eth0 in on switch and eth1 in the other
/etc/modprobe.conf ...
1
vote
2answers
99 views
Server 2012: how to plan for storage failover?
The Stuff
I have the following components to work with:
two rooms
two beefy Dell R510s, one in each room
two EMC VNXe storage devices, one in each room.
The goal
Ensure that if one server room ...
1
vote
1answer
75 views
nginx failover without load balancing
I'm having trouble with configuring nginx.
I'm using nignx for reverse porxy. I just want to send my all requests to my first server. But if the first server is down, i want to send requests to ...
