Hi All

I recently put an nfs-ganesha CEPH_FSAL deployment into production, so far so good but I'm seeing some errors in the logs I didn't see when testing and was hoping someone could shed some light on what they mean. I haven't had any adverse behaviour reported from the clients (apart from a potential issue with slow 'ls' operations which I'm investigating).

Versions:

libcephfs2-13.2.2-0.el7.x86_64

nfs-ganesha-2.7.1-0.1.el7.x86_64

nfs-ganesha-ceph-2.7.1-0.1.el7.x86_64
Ceph cluster is 12.2.10

Log errors:

"posix2fsal_error :FSAL :INFO :Mapping 11 to ERR_FSAL_DELAY"

I'm seeing this one frequently although seems to spam the log with 20 or so occurrences in a second.

"15/05/2019 18:27:01 : epoch 5cd99ef1 : nfsserver : ganesha.nfsd-1990[svc_1653] posix2fsal_error :FSAL :INFO :Mapping 5 to ERR_FSAL_IO, rlim_cur=1048576 rlim_max=1048576
15/05/2019 18:27:01 : epoch 5cd99ef1 : nfsserver : ganesha.nfsd-1990[svc_1653] nfs4_Errno_verbose :NFS4 :CRIT :Error I/O error in nfs4_mds_putfh converted to NFS4ERR_IO but was set non-retryable"

I've only seen a few occurrences of this one

17/05/2019 15:34:24 : epoch 5cdd9df8 : nfsserver : ganesha.nfsd-4696[svc_258] xdr_encode_nfs4_princ :ID MAPPER :INFO :nfs4_gid_to_name failed with code -2.
17/05/2019 15:34:24 : epoch 5cdd9df8 : nfsserver : ganesha.nfsd-4696[svc_258] xdr_encode_nfs4_princ :ID MAPPER :INFO :Lookup for 1664 failed, using numeric group

This one doesn't seem too serious, my guess is there are accounts on the clients with gids/uids that the server can't look up. The server is using SSSD to bind to AD if that helps.

Export:

{
Export_ID=100;
Protocols = 4;
Transports = TCP;
Path = /;
Pseudo = /ceph/;
Access_Type = RW;
Squash = No_root_squash;
Attr_Expiration_Time = 0;
Disable_ACL = FALSE;
Manage_Gids = TRUE;
Filesystem_Id = 100.1;
FSAL {
Name = CEPH;
}
}

Thanks,

David