> Pranith and I had a discussion regarding this issue and here is what we have > in our mind right now. > > We plan to provide the user commands to execute from mount so that he can > access the files in split-brain. This way he can choose which copy is to be > used as source. The user will have to perform a set of getfattrs and > setfattrs (on virtual xattrs) to decide which child to choose as source and > inform AFR with his decision. > > A) To know the split-brain status : > getfattr -n trusted.afr.split-brain-status <path-to-file> > > This will provide user with the following details - > 1) Whether the file is in metadata split-brain > 2) Whether the file is in data split-brain > > It will also list the name of afr-children to choose from. Something like : > Option0: client-0 > Option1: client-1 > > We also tell the user what the user could do to view metadata/data info; like > stat to get metadata etc. > > B) Now the user has to choose one of the options (client-x/client-y..) to > inspect the files. > e.g., setfattr -n trusted.afr.split-brain-choice -v client-0 <path-to-file> > We save the read-child info in inode-ctx in order to provide the user access > to the file in split-brain from that child. Once the user inspects the file, > he proceeds to do the same from the other child of replica pair and makes an > informed decision. > > C) Once the above steps are done, AFR is to be informed with the final choice > for source. This is achieved by - > (say the fresh copy is in client-0) > e.g., setfattr -n trusted.afr.split-brain-heal-finalize -v client-0 > <path-to-file> > This child will be chosen as source and split-brain resolution will be done. +1 That looks quite nice, and AFAICT shouldn't be prohibitively hard to implement. _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-users
