On 03/24/2014 05:22 PM, Steve Dickson wrote: > > On 03/24/2014 05:03 PM, Benjamin Coddington wrote: >> On Mar 24, 2014, at 3:51 PM, Steve Dickson <SteveD@xxxxxxxxxx> wrote: >> >>>>> Finally, what -n value do plan on using? Maybe a blurb in the man page >>>>> on what a good number is and why.... >>>> I've got this running now with -n160, since >>>> we have ~60K distinct uid/gid s. Ideally, I'd like to re-submit >>>> this to self-scale which wouldn't require any sysadmin tuning, >>>> but I haven't had the time. Really, this is just a quick fix >>>> for the brokenness that's in current RHEL and less-new Fedora. >>> The brokenness in RHEL will be healing very soon... See >>> https://bugzilla.redhat.com/show_bug.cgi?id=1033708. RHEL is >>> basically going back to using rpc.idmapd on the client and >>> nfsidmap is going away... It as just a bad dream... It never >>> happen! ;-) >> This BZ says the fix is coming in nfs-utils by removing the nfsidmap command. > Yeah.. I bet the RHEL police are not going to be happy about that... so I > might have to put it back... > >> But IIRC, unless the kernel side of the idmapper is changed, it will exec request-key >> for every lookup before falling back to the upcall, and there's no cache in front of that. >> Isn't that going to have some performance problems? > I don't thinks so, since things will eventually get cached but I'll definitely look into it... The fallback upcall version uses the "id_legacy" keyring to cache results. A bigger keyring might be the best solution. Anna > >> I'm much more interested in getting the keyrings to work, since they seem to >> offer significant performance gains. > I too, but the back port of the current key is a bit too much for RHEL at this point. >> If RH is going to change the kernel side of the idmapper to only upcall, then I'd be satisfied to use that. > It was a bone-head decision on my part to flip this type of switch midstream... > I too just want to put things back to the way were,,, > > steved. > >> Ben >> > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
