+.. SPDX-License-Identifier: GPL-2.0
+
+============================
Ceph Distributed File System
============================
* Easy deployment: most FS components are userspace daemons
Also,
+
* Flexible snapshots (on any directory)
* Recursive accounting (nested files, directories, bytes)
Finally, Ceph also allows quotas to be set on any directory in the system.
The quota can restrict the number of bytes or the number of files stored
beneath that point in the directory hierarchy. Quotas can be set using
-extended attributes 'ceph.quota.max_files' and 'ceph.quota.max_bytes', eg:
+extended attributes 'ceph.quota.max_files' and 'ceph.quota.max_bytes', eg::
setfattr -n ceph.quota.max_bytes -v 100000000 /some/dir
getfattr -n ceph.quota.max_bytes /some/dir
Mount Syntax
============
-The basic mount syntax is:
+The basic mount syntax is::
# mount -t ceph monip[:port][,monip2[:port]...]:/[subdir] mnt
full list when it connects. (However, if the monitor you specify
happens to be down, the mount won't succeed.) The port can be left
off if the monitor is using the default. So if the monitor is at
-1.2.3.4,
+1.2.3.4::
# mount -t ceph 1.2.3.4:/ /mnt/ceph
available modes are "no" and "clean". The default is "no".
* no: never attempt to reconnect when client detects that it has been
- blacklisted. Operations will generally fail after being blacklisted.
+ blacklisted. Operations will generally fail after being blacklisted.
* clean: client reconnects to the ceph cluster automatically when it
- detects that it has been blacklisted. During reconnect, client drops
- dirty data/metadata, invalidates page caches and writable file handles.
- After reconnect, file locks become stale because the MDS loses track
- of them. If an inode contains any stale file locks, read/write on the
- inode is not allowed until applications release all stale file locks.
+ detects that it has been blacklisted. During reconnect, client drops
+ dirty data/metadata, invalidates page caches and writable file handles.
+ After reconnect, file locks become stale because the MDS loses track
+ of them. If an inode contains any stale file locks, read/write on the
+ inode is not allowed until applications release all stale file locks.
More Information
================
https://ceph.com/
The Linux kernel client source tree is available at
- https://github.com/ceph/ceph-client.git
- git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git
+ - https://github.com/ceph/ceph-client.git
+ - git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git
and the source for the full system is at
https://github.com/ceph/ceph.git