RE: A bug in FileStore::mount and A problem about XFS

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On Thu, 14 Aug 2014, Ma, Jianpeng wrote:
> I think you got the old code. I'm not find FX_TYPE_OTHER

It was only recently removed in master.  I suspect this bug is present in 
firefly, though, and should still be fixed!

sage


> 
> 
> > -----Original Message-----
> > From: ceph-devel-owner@xxxxxxxxxxxxxxx
> > [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of nyao@xxxxxxxxx
> > Sent: Thursday, August 14, 2014 12:08 PM
> > To: ceph-devel@xxxxxxxxxxxxxxx
> > Subject: A bug in FileStore::mount and A problem about XFS
> > 
> > 
> > Dear developers,
> > 
> > I find a bug in FileStore::mount() function. If we use raw partitial as a Journal
> > disk, like /dev/sda1, then it will cause a error when setting the parameters
> > "m_filestore_max_inline_xattr_size" and "m_filestore_max_inline_xattrs".
> > 
> > First of all, when creating the FileStore, it calls the mount() and detect fs_type
> > as XFS, so it will check m_filestore_replica_fadvise(true default) and set it to
> > false. At the same time, m_fs_tpye = FS_TYPE_XFS.
> > 
> > However, when create JournalStore, it also enters mount() function and detect
> > fs_type. Unfourtuanlly, this time, m_filestore_replica_fadvise = false so that it
> > cannot update m_fs_type = FS_TYPE_XFS. Instread, it will sets to m_fs_tpye =
> > FS_TYPE_OTHER. This bug is quite easy to repair.
> > 
> > 
> > By the way, I wanna ask another question about XFS, I find that if I use ceph
> > cluster heavily for about 2-3 hour. XFS always wakes up a kernel thread (xfsaild)
> > to deal with its inodes reading and writing.
> > This will impact the performance a lot and make the cluster's throughput drop
> > heavily. So how to solve this problem and why this occurs after running a heavily
> > read, write operation after 2-3 hour.
> > 
> > Best Regards,
> > Neal Yao
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