Hi,
I am trying the rados namespace feature on CephFS over 10.1.0, it
works well when I was using the admin keyring. But when I trying to
lock user "cephFS.tenantA" to /tenantA, the writing speed is extremely
slow.
[Direct]
root@slc5b03c-1gtn:/mnt# dd if=/dev/zero of=./test_big_file of=direct
bs=1M count=20
5+0 records in
5+0 records out
5242880 bytes (5.2 MB) copied, 30.2971 s, 173 kB/s
[Buffer]
root@slc5b03c-1gtn:/mnt# dd if=/dev/zero of=./test_big_file_2 bs=1M count=20
20+0 records in
20+0 records out
20971520 bytes (21 MB) copied, 5.68805 s, 3.7 MB/s
cephFS.tenantA was created by:
root@slc5b03c-2ucb:/mnt# ceph auth get-or-create client.cephFS.tenantA
mon 'allow r' mds 'allow rw path=/tenantA' osd 'allow rw pool=mds_data
namespace=tenantA'
[client.cephFS.tenantA]
key = AQAgeAJXhe7aORAAqx46SfsOqeZQue5XoBV8cQ==
the layout of /tenantA is:
root@slc5b03c-2ucb:/mnt# getfattr -n ceph.dir.layout ./tenantA
# file: tenantA
ceph.dir.layout="stripe_unit=4194304 stripe_count=1
object_size=4194304 pool=mds_data pool_namespace=tenantA"
then try to mount via ceph-fuse like:
root@slc5b03c-1gtn:~# ceph-fuse --id cephFS.tenantA --cluster
slc07_ceph_02 --client_mountpoint /tenantA /mnt
ceph-fuse[94654]: starting ceph client
2016-04-04 07:42:28.096671 7f65000e2e80 -1 init, newargv =
0x7f650a680f60 newargc=11
ceph-fuse[94654]: starting fuse
Note that, the writing speed with admin keyring looks good
root@slc5b03c-2ucb:/mnt/tenantA# dd if=/dev/zero of=./try oflag=direct
bs=1M count=20
20+0 records in
20+0 records out
20971520 bytes (21 MB) copied, 0.432546 s, 48.5 MB/s
And the layout works fine
root@slc5b03c-1gtn:/mnt# rados ls --pool mds_data --namespace tenantA
--id cephFS.tenantA --conf /etc/ceph/slc07_ceph_02.conf
10000000009.00000000
100000003f3.00000001
100000003f4.00000000
100000003f4.00000002
100000003f3.00000000
100000003f4.00000003
100000003f4.00000004
100000003f4.00000001
Is that something bugly in ceph-fuse?
root@slc5b03c-1gtn:~# dpkg -l | grep fuse
ii ceph-fuse 10.1.0-1trusty
amd64 FUSE-based client for the Ceph distributed file
system
ii fuse 2.9.2-4ubuntu4.14.04.1
amd64 Filesystem in Userspace
ii libfuse2:amd64 2.9.2-4ubuntu4.14.04.1
amd64 Filesystem in Userspace (library)
-Xiaoxi
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