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Questions tagged [high-availability]

High availability is an architectural consideration often involving degrees of redundancy to insure availability in case of system or component failure.

High availability is an architectural consideration often involving degrees of redundancy to insure availability in case of system or component failure. Highly available systems are commonly implemented in situations where the risk outweighs the cost.

Best practices such as change control, standardized procedures, and monitoring can also enable high availability.

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Choosing a database management system to maximize availability and scalability

If I was planning on choosing a database management system and know that the data needs to be available as close to 100% as possible and that it needs to scale as well as possible, is there a "best" database management system for that at this time?…
O_O
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Is a virtual IP assigned by a hosting provider?

I'm going to be setting up HA proxy with 2 physical servers, using heartbeatd. I'm going to have clients point domains to an IP address which can't change after doing so. My hosting provider has provided me with 6 IP addresses. Will I need to use…
orokusaki
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Relying on shared disks for heartbeat

I read somewhere that using shared disks for heartbeats is reliable even if network totally fails. I read it in the context of remedy from split-brain. Is this correct? But I can not understand this. If network fails, doesn't this also affect shared…
user76678
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Simple IP load balancer for web service that runs on Windows XP or Windows 7 Professional?

I've a closed code application that needs to connect to a web service that needs to run on XPs or Windows 7 (desktop). The application can only connect to a single IP address. The application is low volume - less than 1000 HTTP GETs a day. The…
Joshua Lim
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corosync active-active with 2 virtual IPs - clone constraints task

I have DNS roundrobin on 2 virtual IP in front of service. (Among others the service tested was: apache, nginx, varnish, postfix, … It really does not matter. Let's call it just service.) I have corosync config where on two nodes service is running…
Arek B.
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How to improve my current HA design

I am trying to create high availability application. My current design has two VMs, both have public IPs, both are running in same subnet and both VMs have same web application running in docker. ssl certs and traffic to the app in docker is managed…
Sandeep Kumar
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How to create a group of servers listening on the same IP-address, allowing failover/takeover?

I'd like to deploy a web application in a robust manner. The application itself is written using Elixir, which runs on top of Erlang/OTP, meaning that the application can be deployed on different nodes which can internally manage failover/takeover…
Qqwy
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IP configuration of cluster application to database server

I need to setup the IP of a cluster of applications servers to connect to a cluster of database servers. For 1 to 1, application server to database server is quite easy, but when comes to a cluster environment, I wonder how should I configure/setup…
John
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What's the best way to sync folders across 03 or more webservers?

I have 03 servers and I want to sync some folders across them. I'm using DRBD + OCFS2 for a year or so, but it doesn't support more than 02 servers right now. I read about GlusterFS and CEPH, but there are a lot of bad reviews about them related to…
Steve Lacerda
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Shared storage solution for Debian Wheezy

I need to setup a new infrastructure which provides high available shared storage between debian servers. Our current solution is a "clustered DRBD NFS solution". We have setup 2 virtual file servers and mirror the shared storage with drbd. We run…
markus
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Options for high-availability of a smallish website?

I'm running a website that gets ~1500 visitors a day. It's not a ton, but I want to make sure this site stays up nevertheless. Currently, we're hosted on a shared hosting provider and the site has gone down once or twice due to DDoS attacks. What…
mpen
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Cheapest High Available Web Server

I would like to create a high-available setup (e.g. a small cluster) for a webserver, i.e. it will run Apache, PHP and MySQL. There will be between 2-8 small websites running with only very little traffic and workload. High availability is however…
xyz
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Differences between VMware and XCP-ng hipervisor

I am currently researching XCP-ng hipervisor and I was wondering what are the main differences between the XCP-ng and VMware hipervisor. As far as I can see the XCP-ng does not have high availability features as advanced as VMware's. The VMware has…
Zoran Jankov
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How to design high availability system

Suppose I have some web applications & also some desktop applications running on a server in production environment. In production environment, even a single minute downtime is not tolerated. Currently I know only about HA Cluster system which is…
Harshit
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Azure extra small vm availability set

My current extra small vm reaches the limits, so I decided to create a second extra small instance and add the two into a availability set so my service is everytime available and through the load balancer also the load is balanced. My question is…
Michael
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