On Thursday 09 February 2012 07:25 PM, Holger Levsen wrote: >> Please use libprio instead. > I'd love to, but I cannot find information how to. Can you please point me in > the right direction? Or just give an example for the usecase outlined in this > bug report. Have a look at the multipath.conf.annotated file in the example/ folder.
To quote: # # name : prio # # scope : multipath & multipathd # # desc : the default function to call to obtain a path # # priority value. The ALUA bits in SPC-3 provide an # # exploitable prio value for example. # # default : const # # # prio "alua" # # # # # name : prio_args # # scope : multipath & multipathd # # desc : The arguments string passed to the prio function # # Most prio functions do not need arguments. The # # datacore prioritizer need one. # # default : (null) # # # prio_args "timeout=1000 preferredsds=foo" # In case you want to have your own prioritizer, have a look at libmultipath/prioritizers/ You'll have to add your prioritizer and rebuild it. Otherwise, if your storage controller is a recent standards compliant array, you can try to use ALUA. BTW, what exact use case do you have? I see you've chosen to queue i/o when all paths are down. So you'd also want to use queue_if_no_path. -- Ritesh Raj Sarraf | http://people.debian.org/~rrs Debian - The Universal Operating System
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