I am looking at glusterfs for a HA application w/o local tech support (don't
ask, third-world country, techs are hard to find).
My current plan is to do a replica-4 + hot spare server. Of the four in-use
bricks, two will be on "servers" and the other two will be on a "client"
machine and a "hot-backup" client machine. No striping, all content on each
local machine, each machine using its own disk for all reading.
Part of my plan is to have a cold-spare server in the rack, not powered on.
(This server will also be a cold spare for another server).
I am wondering if this would be a viable way to set up this configuration:
Set up glusterfs as replica-5.
1. server1
2. server2
3. client
4. client-standby
5. server-spare
Initialize and set up glusterfs with all 5 bricks in the system (no file
content).
Install system at client site, and test with all 5 bricks in system.
Shut down spare server.
Once a month, power up spare server, run full heal, shut down.
Power up server-spare for any software updates.
If server1 or server2 dies (or needs maintenance), tell them to power up
server-spare, and let it heal.
It seems to me that this would be easier than setting up a replica-4 system
and then jumping through all the hoops to replace a server from scratch.
Comments, reactions, pot-shots welcome.
Ted Miller
--
"He is no fool who gives what he cannot keep, to gain what he cannot lose." - -
Jim Elliot
For more information about Jim Elliot and his unusual life, see
http://www.christianliteratureandliving.com/march2003/carolyn.html.
Ted Miller
Design Engineer
HCJB Global Technology Center
2830 South 17th St
Elkhart, IN 46517
574--970-4272 my desk
574--970-4252 receptionist
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