Etcd 0.3.0 – Improved Cluster Discovery, API Enhancements and Windows Support • Hacker News Board

"A highly-available key value store for shared configuration and service discovery. etcd is inspired by zookeeper and doozer..." -- https://github.com/coreos/etcd

Re: Etcd 0.3.0 – Improved Cluster Discovery, API Enhancements and Windows Support

#6

Post by jarito » Sat, Feb 08, 2014, 2:19 AM UTC

Touche wrote: post #4

I can't figure out what etcd is. Any help?

It is a distributed configuration management clustering product like zookeeper. It simplifies the creation and sharing of mostly configuration data in clustered or distributed systems.

Re: Etcd 0.3.0 – Improved Cluster Discovery, API Enhancements and Windows Support

#7

Post by Touche » Sat, Feb 08, 2014, 2:20 AM UTC

jarito wrote: post #6

Touche wrote: post #4

I can't figure out what etcd is. Any help?

It is a distributed configuration management clustering product like zookeeper. It simplifies the creation and sharing of mostly configuration data in clustered or distributed systems.

I don't know what that means or what zookeeper is... Can you explain the problem it solves?

Re: Etcd 0.3.0 – Improved Cluster Discovery, API Enhancements and Windows Support

#8

Post by sethhochberg » Sat, Feb 08, 2014, 2:25 AM UTC

Touche wrote: post #7

jarito wrote: post #6

Earlier quoted context omitted.

It is a distributed configuration management clustering product like zookeeper. It simplifies the creation and sharing of mostly configuration data in clustered or distributed systems.

I don't know what that means or what zookeeper is... Can you explain the problem it solves?

Imagine you're working with a processing system made up of tens or hundreds of computers all (usually) identically configured, networked together and solving small chunks of a large problem. This is software to minimize the effort required to configure all of those individual systems which make up the "compute cluster".

Re: Etcd 0.3.0 – Improved Cluster Discovery, API Enhancements and Windows Support

#9

Post by bkirwi » Sat, Feb 08, 2014, 4:02 AM UTC

I'm curious to know more about the garbage collection of stale peers.

- AFAIK, etcd is built on RAFT, which relies on a 'joint majority' method of transitioning cluster membership. Are there any issues forming agreement on what the new membership should be when it's unclear what nodes are still supposed to be part of the cluster? - In the land of ZooKeeper, cluster configurations are typically very very stable, so tracking membership takes very little information. Is etcd targeted to more dynamic environments where the garbage generated by entering and leaving nodes is significant?

Re: Etcd 0.3.0 – Improved Cluster Discovery, API Enhancements and Windows Support

#10

Post by DannoHung » Sat, Feb 08, 2014, 4:07 AM UTC

Touche wrote: post #4

I can't figure out what etcd is. Any help?

Y'know how you can use ENV on Linux to have programs be configured or tell multiple programs what port something is listening on?

Imagine that, but across multiple servers at once. Plus a few other things that some use cases have been built up for.