I'm not sure exactly what would happen on an inode collision, but I'm guessing Bad Things. If my math is correct, a 2^32 inode space will have roughly 1 collision per 2^16 entries. As that's only 65536, that's not safe at all.
On Mon, Oct 14, 2019 at 8:14 AM Dan van der Ster <d...@vanderster.com> wrote: > > OK I found that the kernel has an "ino32" mount option which hashes 64 > bit inos to 32-bit space. > Has anyone tried this? > What happens if two files collide? > > -- Dan > > On Mon, Oct 14, 2019 at 1:18 PM Dan van der Ster <d...@vanderster.com> wrote: > > > > Hi all, > > > > One of our users has some 32-bit commercial software that they want to > > use with CephFS, but it's not working because our inode numbers are > > too large. E.g. his application gets a "file too big" error trying to > > stat inode 0x40008445FB3. > > > > I'm aware that CephFS is offsets the inode numbers by (mds_rank + 1) * > > 2^40; in the case above the file is managed by mds.3. > > > > Did anyone see this same issue and find a workaround? (I read that > > GlusterFS has an enable-in32 client option -- does CephFS have > > something like that planned?) > > > > Thanks! > > > > Dan > _______________________________________________ > ceph-users mailing list -- ceph-users@ceph.io > To unsubscribe send an email to ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
