On Tue, Dec 12, 2006 at 12:10:28AM +0300, Igor Zhbanov wrote: > Hello! > > I want to build system consisting of several frontend-nodes and two-four > backend (storage) nodes. I don't want to use hardware shared storage for > some reasons. So, we can use some networking block device to connect two > nodes (e.g. DRBD v0.8 in primary/primary mode, or GNBD?) if needed. > The question, is it possible to setup Red Hat Cluster in such configuration: > 1) over DRBD or local hard drives if possible on two or four storage nodes; > 2) to be able mount file system at frontend nodes which have no direct > access > to shared storage device, i.g. is it possible to mount file system over > network?; > 3) to have failover and load-balancing storage nodes, so each node will hold > entire copy of stored data, so storage nodes can be accessed in parallel > and if one node goes down, system will function correctly. > 4) If it is possible to mount file system on some other node, will it be > mounted as file system or firstly some block device will be exported > to that node and file system will be mounted over it? > > Thank you. The short answer is, well... sort of. If you want to have several frontend nodes talking to 2 backend GFS nodes via NFS, then I believe that the answer is yes. I haven't tried it myself, but people claim to have run GFS on top of primary/primary DRBD. However, I think DRBD limits you to 2 nodes. The other way to do this involves cluster-mirror, which hasn't been officially released yet. This will allow you to have any number of backend nodes running GNBD. The exported GNBD devices will all be bundled into a mirror device on the frontend nodes, which would run GFS. The cluster mirror code is available via CVS, if you want to try this setup out. -Ben > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
