Krishna Srinivas wrote: > On Nov 16, 2007 11:48 PM, Székelyi Szabolcs <cc@xxxxxxxxx> wrote: >> Krishna Srinivas wrote: >>> "option read-node <sobvol>" will read from that particular subvol >>> (this will help when that subvol is local storage) >>> "option read-node *" will load balance from all children. >>> So option is either * or one of the subvols. >>> default is "option read-node *" >>> What do you think about it? >> >> What about explicitly listing the subvolumes to perform load-balancing >> between? For example, "option read-nodes child1 child3" could cause AFR >> to load-balance reads between child1 and child3, while writing to all >> its children (child[1-3], say). The default option could be to read from >> the first child. "option read-nodes *" could still mean to use all >> subvolumes. > > We thought about "option read-node child1,child3" but this wont really > be used in the sense that users would want to read either from local > storage or all the children. But there might be a case where one of the > sobvols might be a low end machine where we dont want to schedule > reads. Still thinking if it is worth implementing this particular feature. Consider the situation when I want to have 4-5 local (ie. on-site) mirrors for (read) performance, and also a few remote (ie. off-site, on the other end of a lower bandwidth link) for backup. This is not an unusual setup. -- cc
