Hi thereFirst my Setup:- Two Server with the same Hard and Software (CentOS 5.4 with same Packages installed)- Cluster Setup with DRBD. There is a GFS2 and a LVM between DRB... [by Beleggrodion]
on 03/26/2010 – Made popular on 03/26/2010
I'm trying to set up two machines synchonizing with DRBD. The storage is setup as follows: PV -> LVM -> DRBD -> CLVM -> GFS2.
DRBD is set up in dual primary mode. The first server is set up and running fine in primary mode. The drives on the first server have data on them. I've set up the second server and I'm trying to bring up the DRBD resources.
Was wondering if any software exists for mirroring memory across hosts
like what drbd does for disks.
I am somewhat aware of copying of a VM's memory when a live migration is done.
Another query, as I have not seen too many VM migrations, is that what
happens to the memory contents such as data yet to be written onto
disk, states etc happens when one of the RHCS cluster hosts which is
I currently operate a very successful DRBD + OCFS2 web server cluster. Combined with two A10 hardware load balancers. Its been running for over a year and has fully automatically handled a number of outages with no downtime.
Currently in two datacenters there is a web server and a database server pair. The webservers have all the website files with DRBD + OCFS2.
Along the lines of this MSDN article, how would you setup a pair of Ubuntu or CentOS (or RHEL) servers in a cluster so they appear to hosted applications as a single server, but will continue to work even if a node in the cluster becomes inoperable (or needs maintenance, etc)?