>> -----Urspr?ngliche Nachricht----- >> Von: gluster-users-bounces at gluster.org >> [mailto:gluster-users-bounces at gluster.org] Im Auftrag von Ted Miller >> Gesendet: Freitag, 16. August 2013 18:29 >> An: gluster-users at gluster.org >> Betreff: standby-server >> 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 >> Ted Miller >> Design Engineer >> HCJB Global Technology Center >> Elkhart, IN 46517 On 8/19/2013 2:38 AM, Daniel M?ller wrote: > What ist he reason about a "spare server" ? With gluster just replicate to the real status all the time!? This is a hot, tropical location with terrible power, a lot of lightning storms and only part-time air-conditioning. Hardware failures are common. I am doing what I can to protect against the power problems, but it is still an environment that is very hard on equipment. This system will be business-critical--it is a radio station, and their music and other programs will be on the glusterfs, with downtime beyond seconds becoming dead air. If there is a catastrophic event, I want the spare server to have been off, and thus (most likely) not damaged. It can be brought on-line to restore dual server status. > Or just do geo replication to a non gluster machine!? I plan on doing geo-replication, but restoring a multi-terabyte file system over a 4Mb link will take days. We would probably have to rsync the file system to portable drives and fly them over. Hope that helps the perspective a bit. Ted Miller > ----------------------------------------------- > EDV Daniel M?ller > > Leitung EDV > Tropenklinik Paul-Lechler-Krankenhaus > Paul-Lechler-Str. 24 > 72076 T?bingen > > Tel.: 07071/206-463, Fax: 07071/206-499 > eMail: mueller at tropenklinik.de > Internet: www.tropenklinik.de > ----------------------------------------------- > > > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://supercolony.gluster.org/mailman/listinfo/gluster-users Ted Miller Design Engineer HCJB Global Technology Center Elkhart, IN 46517
