have you enabled path restriction on cephfs? On Thu, Aug 25, 2016 at 1:25 AM, Lazuardi Nasution <mrxlazuardin@xxxxxxxxx> wrote: > Hi, > > I have problem with CephFS on writing big size file. I have found that my > OpenStack Nova backup was not working after I change the rbd based mount of > /var/lib/nova/instances/snapshots to CephFS based (mounted on /etc/fstab on > all Nova compute nodes). I couldn't relize the cause until I tried to do > some test below. > > [root@compute-aa instances]# sudo -S -u nova dd if=/dev/zero > of=./snapshots/test/test.dat bs=4096 count=1024 > 1024+0 records in > 1024+0 records out > 4194304 bytes (4.2 MB) copied, 0.002956 s, 1.4 GB/s > > It seem that making 4.2MB size file is OK. The "test" folder was been > created by nova user too. > > [root@compute-aa instances]# sudo -S -u nova dd if=/dev/zero > of=./snapshots/test/test.dat bs=4096 count=1048576 > > This test was hang and gave me "D state" of dd process which cannot be > killed, so I must reboot that node. This make afraid to do some more test > with lower size. When I tried to see the folder content, I found following > result. > > [root@compute-aa ~]# ls -lah /var/lib/nova/instances/snapshots/test/ > total 0 > drwxr-xr-x 1 nova nova 0 Aug 24 22:35 . > drwxr-xr-x 1 nova nova 0 Aug 24 22:33 .. > -rw-r--r-- 1 nova nova 0 Aug 24 22:35 test.dat > > I prefer to use CephFS since the snapshot folder is only for temporary. > Please help me to solve this problem. > > Best regards, > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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