Difference: AdministrativeSinglePrimaryCluster (5 vs. 6)

Revision 62010-10-01 - WilliamSeligman

Line: 1 to 1

META TOPICPARENT	name="Computing"

Nevis particle-physics administrative cluster

Line: 23 to 23

In the 2000's, nevis1 was gradually replaced by many Linux boxes. Administrative services were moved to separate systems, typically one service per box; e.g., there was a mail server, a DNS

server, a Samba

server, etc. Each working group at Nevis purchased their own server and managed their own disk space. The above issues were resolved:

Jobs could be sent to the condor batch system, so that no one system would be slowed down due to a user's jobs.

Changed:

<
<

A single computer system could be restarted without affected most of the rest of the cluster; e.g., if the mail server needed to be rebooted, it didn't affect the physics analysis.

>
>

A single computer system could be restarted without affecting most of the rest of the cluster; e.g., if the mail server needed to be rebooted, it didn't affect the physics analysis.

If a server because compromised, e.g., the web server, the effects could be restricted to that server.

This configuration worked well for a few years, but some issues arose over time:

Line: 65 to 65

These services are not part of the HA cluster because:

in the hopefully unlikely event that the HA cluster needs to be rebooted, it's nice to have the services on hermes still available during the reboot;

Changed:

<
<

it takes a bit of time for the HA cluster to start up after, e.g., a power outage; again, it's nice to have the above services immediately available.

>
>

it takes a bit of time for the HA cluster to start up after, e.g., a power outage; again, it's nice to have the above services immediately available.

The HA cluster

Line: 164 to 164

http://www.clusterlabs.org/wiki/Main_Page

http://www.clusterlabs.org/rpm/

http://theclusterguy.clusterlabs.org/post/178680309/configuring-heartbeat-v1-was-so-simple

Changed:

<
< http://www.clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/

>
> http://www.clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/
http://www.ourobengr.com/ha

DRBD

View topic | History: r9 < r8 < r7 < r6 | More topic actions...