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
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2answers
47 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
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0answers
9 views
Windows 2003 cluster: One node offline causes the cluster service on the other node to fail
I configured a 2 node cluster on 2 Windows 2003 machines with Exchange 2003
The resources:
Majority node set
Data volume
Cluster IP
Cluster network name
Exchange 2003 system attendant (and all ...
-3
votes
3answers
58 views
How to failover to another web service automatically?
I've got a 3rd party off-the-shelf windows application that needs to connect to a Web Service (IP address or URL) installed onto another server (actually running on Windows 7 Professional).
My user ...
1
vote
3answers
48 views
Building right system for my needs
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 ...
0
votes
3answers
59 views
Manage DNS outage
I have been using ZoneEdit to manage my DNS. This has been generally fine except I did have a half our outage where two of their DNS servers were down causing my site to be inaccessible. What is the ...
1
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0answers
31 views
network card failover [closed]
Possible Duplicate:
NIC Active/Passive bonding with priority
I have dell poweredger server with fiber ethernet port and normal ethernet port.
I have to configure same IP on each port
...
1
vote
1answer
42 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
55 views
PG pool failover leads to two independent masters with network failure
I've got two servers set up with PG Pool to create a HA setup for a webapp.
PGPool and postgres run on both servers, using streaming replication from server 1 to server 2. The webapp on each machine ...
0
votes
1answer
82 views
AlwaysOn SQL Server 2012 - any option for true active/active?
I'm about to upgrade and consolidate a group of SQL Server 2008R2 to a single SQL Server 2012.
I want have high availability and looking for the different options. The number of databases is fairly ...
0
votes
0answers
37 views
ISC-DHCPD failover, Modifying host definitions via OMAPI
Background: I'm working on replacing my single DHCP server with 2 in a failover configuration. When I do a DHCP request I see the lease is created in both dhcpd.leases files on each server. However, I ...
1
vote
2answers
46 views
Cloning IP address and/or MAC address for server fail-over
I am currently providing some web applications to my customers (apache/php/mysql on Windows server). I'm looking to provide some sort of fail-over server in the case my server has a hardware failure. ...
0
votes
1answer
47 views
httpd server is not starting
I am implementing failover mechanism in JBoss from here
I added following line in httpd.conf file
LoadModule jk_module modules/mod_jk.so
Now I am getting following error while starting Apache
...
-1
votes
1answer
44 views
Windows Server 2008 R2 Cluster with just two nodes
May be this question was already made, but I dont find an exact answer to my dilema.
I have a consulting IT job, my client have only 2 servers (16GB RAM, 2 Xeon 5160 and 500GB HDD) and him want to do ...
13
votes
4answers
279 views
When my A web server gets unplugged, how do I automatically redirect all the users to my B web server in another city, and vice versa?
When my A web server gets unplugged, how do I automatically redirect all the users to my B web server in another city, and vice versa?
A load-balancing switch does what I want, except I can't figure ...
1
vote
2answers
51 views
Advice re simplest possible windows servers with failover capability?
I am supporting a company sells things to the public in three stores. At this time, the main site has two servers (file + AD server, and citrix server), and the other locations have one server (all ...
0
votes
1answer
73 views
What is a good solution for failover when all I have is 2 physical servers?
I have 2 physical servers, each with 32GB RAM and 2 quad core procs. Each will run VMWare, 4 VMs each, one DB, 1 app server, 1 task queue server, and one general purpose server. One will run my web ...
0
votes
1answer
51 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
votes
1answer
20 views
Active node stops resources when pasive node is shutdown
2 nodes, active/pasive. 2 resources, a virtual ip, openLdap, and the nfs mount where openldap saves the data.
When both nodes are up, things worked fine. You could move resources away and put the ...
0
votes
1answer
41 views
Website caching failover service [closed]
A while back I remember reading about a service that provided failover support for websites. I never got around to reading specifics and now I can't remember the name of the service. Does anyone have ...
2
votes
2answers
86 views
RAID 1 Failover
Given two disks in a (hardware) RAID 1 configuration, what exactly happens to a production system when one drive fails?
Is there any noticeable service interruption, or will the system continue ...
1
vote
2answers
85 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 ...
-3
votes
1answer
81 views
Are self Self-healing Cloud and Traditional Failover Boxes basically the same?
Does it still make sense to setup your own failover system (HAproxy + 2 or more servers for example) when self healing cloud seems like a practical solution? They seem to do the same job or am I ...
0
votes
1answer
81 views
DNS failover in a two datacenter scenario
I'm trying to implement a low-cost solution for website high availability. I'm looking for the downsides of the following scenario:
I have two servers with the same configuration, content, mysql ...
0
votes
2answers
60 views
Methods to remotely change virtual IP of server
I'm intending to use virtual IP for my failover implementation.
Setup:
*Server A (192.168.0.1) * - takes virtual IP of 192.168.0.10 by default
*Server B (192.168.0.2) * - takes virtual ip of ...
0
votes
1answer
39 views
VPN redundancy, failover
I am making a project for school with 3 offices wich are connected with vpn, the main server infrastructure is located in the head office and i am trying to remove all the single point of failures. ...
1
vote
3answers
198 views
Linux WAN failover simple solution needed
I'm banging my head against the wall to come up with a clever and simple solution to WAN failover. This is for a SOHO installation with two different external IPs. Only outbound connection failover ...
0
votes
4answers
168 views
Nagios: Is it possible to have multiple IPs for a host?
In our office we have dual WAN setup, if our cable connection drops we still get connectivity via our T1. The only issue is that our office network is no longer available on the same IP so all Nagios ...
1
vote
1answer
85 views
Wireless LAN Bridge with WAN VPN Failover
My network is below, it's currently just an ordinary 192.168.0.0/24, the branch offices needs to have access to resources on the main site. Currently all internet traffic go across the bridge and ...
4
votes
3answers
322 views
Should the SAN (Dell MD3200) management port be on the same subnet/VLAN as the failover cluster private subnet/VLAN?
So, I'm getting a bit confused here. I have a Dell MD3200 SAN with dual controllers. Each controller has an Ethernet management port that connects to a switch. Together the two controllers connect to ...
3
votes
1answer
72 views
Our datacentre is forcing us to change IP addresses, what is the best way to take advantage of the period when they're both active (failover gateway)?
The subnet of IPs the datacentre gave us was apparently on loan, so they assigned us a new block and gave us two weeks to swap them over, during which both will be active. They're on totally different ...
1
vote
2answers
125 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 ...
4
votes
5answers
419 views
Ubuntu failover from Ethernet-to-ADSL-modem to USB 3G dongle
I have an internet connected Ubuntu server, connected by Ethernet to a residential ADSL line. This is adequate, most of the time, but I can't rely upon the ADSL link to be as reliable as I'd like. ...
0
votes
0answers
95 views
Cisco 2911 - BDSL/3G-HWIC - How to failover to 3G if BDSL offline?
We have a site where we have a cisco 2911 router.
Said router has BDSL provided over ethernet and a 3G-HWIC for redundancy.
At the moment this is manually failed over in the event of a BDSL outtage, ...
7
votes
2answers
183 views
Multi-site high availability
We have a SaaS application that we need to be highly available. We already have an expensive, well-maintained Hyper-V failover cluster, but today the datacenter where we host that cluster had a ...
0
votes
1answer
70 views
redirect to a static page on another web server when main web server is down
We have a single IIS web server in house that when it goes down we would like to redirect traffic to another web server and display a message that the web site is down. I have been all over the net ...
3
votes
1answer
611 views
Pacemaker Active/Active haproxy load balancing
I am using Haproxy to load balance replicated mysql master servers. I am also using Heartbeat and Pacemaker for Active/Active ip failover with two virtual ips on the two load balancers for web server ...
0
votes
1answer
41 views
Advanced SQL Setup
Got a major issue that I need some help with. Here is the situation.
The client has multiple web sites hosted on multiple web servers (virtual machines) running on multiple virtual hosts that ...
0
votes
0answers
65 views
Do I need an SQL Server 2012 / Windows Server 2012 Upgrade Insurance? [closed]
We are a small SaaS company that has until recently participated in Microsoft's Bizspark program. Now that our Bizspark subscription is over, we have a time-limited oppurtunity to buy discounted ...
0
votes
2answers
39 views
Howto switch ISP provider? [closed]
Possible Duplicate:
Office network failover?
I have a office LAN providing internet access to several workstations, each workstation it is basically connected to the hub that it is ...
1
vote
2answers
218 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 ...
2
votes
1answer
194 views
DNS Failover when Datacenter is dead
I'm just trying to configure my DNS server to switch the DNS entry in my DNS server (bind) if a server becomes unreachable. Is there a simple tool that I can use to do so?
0
votes
1answer
59 views
mysql/web server failover setup using reverse proxy
I have two webservers and at the moment have DNS - Round Robin setup so that they are somewhat 'failsafe' this was only ever a temporary failover solution and I am now looking at a more permanent and ...
1
vote
2answers
104 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 ...
4
votes
2answers
555 views
How good is failover of the iSCSI target on a two-node linux san?
I'm evaluating the possibility to use two off the shelf servers to build a cheap iSCSI redundant SAN. The idea is to run linux, pacemaker, and an iSCSI target - something like the SAN Active-Passive ...
1
vote
1answer
95 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 ...
2
votes
1answer
312 views
Heartbeat Pacemaker 3 node/ip failover
I have setup two node active/active ip failover with heartbeat and pacemaker following the link at zivtech on the two load balancers for the backend web servers. Two LBs has public ip each which is ...
1
vote
4answers
237 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 ...
3
votes
3answers
138 views
Two server with same data in case one goes down
I actually own two linux web servers and I was wondering how I could make them work together in case one goes down.
From what I found, cluster seems to be the closest, because it would replicate the ...
0
votes
1answer
73 views
How to approach high availability and fail-overs when moving to a vmWare cloud server/cluster
I'm currently running a CentOS VPS with some simple web/DB/VPN servers, but I'm planning to move to a vmWare Enterprise cloud based machine in the near future to improve availability, and I need to ...
1
vote
1answer
177 views
Heartbeat ip failover on Ubuntu
I have 3 servers, 1 as load balancer and 2 as web-servers(apache tomcat) hosting some jsp pages. I want to add one more load balancer in active/passive mode to avoid SPOF and below is the expected ...
