With that release it shouldn't be the EC pool causing trouble; it's the CRUSH tunables also mentioned in that thread. Instructions should be available in the docs for using older tunable that are compatible with kernel 3.13. -Greg
On Saturday, November 7, 2015, Bogdan SOLGA <bogdan.so...@gmail.com> wrote: > Hello, everyone! > > I have recently created a Ceph cluster (v 0.94.5) on Ubuntu 14.04.3 and I > have created an erasure coded pool, which has a caching pool in front of it. > > When trying to map RBD images, regardless if they are created in the rbd > or in the erasure coded pool, the operation fails with 'rbd: map failed: > (5) Input/output error'. Searching the internet for a solution... I came > across this > <http://lists.ceph.com/pipermail/ceph-users-ceph.com/2014-June/040493.html> > page, which seems to detail exactly the same issue - a 'misunderstanding' > between erasure coded pools and the 3.13 kernel (used by Ubuntu). > > Can you please advise on a fix for that issue? As we would prefer to use > erasure coded pools, the only solutions which came into my mind were: > > - upgrade to the Infernalis Ceph release, although I'm not sure the > issue is fixed in that version; > > > - upgrade the kernel (on all the OSDs and Ceph clients) to the 3.14+ > kernel; > > Any better / easier solution is highly appreciated. > > Regards, > > Bogdan >
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