Datacenter and/or server failures are no fun for anyone, especially those responsible for website operations. If you’ve protected yourself by using Active Failover — an advanced feature available for DynECT Managed DNS users — your site will remain live and accessible without any of your visitors knowing the difference.
Vgdisplay, lvdisplay to display lvm components
vgdisplay
lvdisplay
Commands to list volume groups and logical volumes in a more civilized manner.
This link was posted in the past but not with regard to these commands which are very very useful when needed.
Pingdom Web site monitoring for 100% uptime. Measure your downtime.
Pingdom Web site monitoring for 100% uptime. Measure your downtime..
How it works
The Pingdom service monitors websites and servers from multiple locations on the Internet, making sure that they are working. You can use Pingdom to monitor both your public and password-protected websites, your FTP servers, your email servers, and any other kind of service that should be accessible from the Internet.
If your site stops working, Pingdom will alert you immediately. Like a watchdog.
I signed up for the free account that monitors a single server. We’ll see how well this works.
How to Compare Hosted DNS Providers (with Data!) – DNS
How to Compare Hosted DNS Providers (with Data!) – DNS.
My colleagues & I run a popular website and are constantly concerned with scaling and performance. Until last week, we had been running our own DNS servers (BIND) on Amazon EC2 instances.
We use Pingdom to monitor many functions of our servers, including DNS. What we saw was a resonable average resolution time of about 130ms, but frequent outliers higher than 500ms! The thought of a half-second penalty to the load time for first time visitors is not appealing. So we started to dig into the problem.
Cheap Domain Names Registration, Domain Transfer, SSL Certificates, Free DNS, Privacy Protection • Namecheap.com
This is really cheap — $2.99/year.
Update: The .com price is still $10/year. $2.99 is for .info. I wonder why no one wants .info?
Cloud Hosting – Simple Hosting – PaaS – Gandi.net
How it works
Each instance gets its own container that contains its database services, the program language interpreter, and its own web server.
Client requests arrive at a load balancer that distributes traffic to http proxies. These proxies benefit from a very efficient local cache: for each request, they verify whether or not there is a more recent version already in the cache. If it is present, the reply is automatically sent to the client. The cache’s “time to live” depends on the “max-age” http header.
Protocol Compiling and Lower Level RPC Programming
Protocol Compiling and Lower Level RPC Programming.
An rpcgen Tutorial
rpcgen provides programmers a simple and direct way to write distributed applications. Server procedures may be written in any language that observes procedure-calling conventions. They are linked with the server stub produced by rpcgen to form an executable server program. Client procedures are written and linked in the same way. This section presents some basic rpcgen programming examples. Refer also to the man rpcgen online manual page.
SunRPC beginner tips
RPC is extremely painful and there isn’t to much in the way of beginners resources.
via SunRPC beginner tips « ☠ I could not think of a blog title ☠.
Load balancing – LVSKB
In computing, load balancing is a technique used to spread work load among many processes, computers, networks, disks or other resources, so that no single resource is overloaded.
Load balancing can also be considered as distributing items into buckets:
- data to memory locations
- files to disks
- tasks to processors
- packets to network interfaces
- requests to servers
Its goal is even distribution.