Hi all, we see a significant performance hit when mirroring is used for a cLVM2 LV. That's clearly due to the performance overhead of bouncing to user-space (and worse, to the network) for locking etc. I wonder if consideration has been given to how this could be improved? Using the in-kernel DLM and holding locks for regions the local node writes to for longer, exclusive locks while noone is reading, parallelizing the resync ...? How is the long-term perspective for this given the dm-raid/md raid stuff? Before we go drafting I wanted to ask for ideas that are already floating around ;-) Anyone working on this? Regards, Lars -- Architect Storage/HA SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 21284 (AG Nürnberg) "Experience is the name everyone gives to their mistakes." -- Oscar Wilde -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel