Hello everyone, I'm new to this list so please bear with me. My previous Linux clustering/HA has come from LinuxHA and Linux LVS. Linux HA/LVS are great for application HA/Load balancing but not for HA storage, before you all scream I know about DRBD but that seems slow and kludgey. I'm wanting to setup two servers with CLVS and I want to create an LVM2 mirror spread across the two servers (neither server will access the partition at the same time -- so I'm not too worried about using EXT2/3). Ideally I want to have a 'global' Volume Group with PVs from both boxes and from that create the mirrored LVs. If this is crazy or undo-able please let me know. Heh, I'm not sure if I'm making things worse for myself or not but I'm running on Debian 4.0 Etch. >From what I've gathered I need to configure the following daemon and applications, let me know if I'm missing anything (or have too much =): 1. CCS - Cluster configuration manager 2. CMAN & DLM -- Cluster Manager (or GULM?) 3. Fence I/O 4. CLVM daemon 5. gnbd -- maybe for fencing purposes? Some questions I have about Linux Cluster for CLVM are: 1. lock_gulmd vs. cman & dlm -- If I were using GFS2 I would want to use glumd right? 2. fencing -- Ick!!! I don't have any of the fencing agents -- such as an APC MasterSwitch, IBM Blade center, Brocade McData, Sanbox/Qlogic, or Vixel fibre switches, Egenera blades, HP ILO ... that leaves me with GNBD and Manual/Manual_ack. From the man pages it's suggested I not use Manual/Manual_ack for production. I really don't need automatic re-adding of an node once it comes back up, what issues will I run into using manual fencing? 3. cman -- What issues are there to getting CMAN running? I'm having trouble getting a custom kernel compiled with the CMAN-Kernel module. 4. ccs_tool, cman_tool and version numbers. I see there's config versions in /etc/cluster/cluster.conf and that ccs_tool is used to send updates (changes) to the other nodes. Soooo I assume when you make a change to a running cluster you increment the version number each time and you use that new version number when you run cman_tool? Thanks, Jim James Miller - MCSE RHCE CISSP Sr Systems & Network Administrator Simutronics Corp. www.play.net 636.946.4263 x113 -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
