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* libglusterfs changes to add new fop
* Fuse changes:
- Changes in fuse bridge xlator to receive and send responses
* posix changes to perform the op on the backend filesystem
* protocol and rpc changes for sending and receiving the fop
* gfapi changes for performing the fop
* tools: glfs-copy-file-range tool for testing copy_file_range fop
- Although, copy_file_range support has been added to the upstream
fuse kernel module, no release has been made yet of a kernel
which contains the support. It is expected to come in the
upcoming release of linux-4.20
So, as of now, executing copy_file_range fop on a fused based
filesystem results in fuse kernel module sending read on the
source fd and write on the destination fd.
Therefore a small gfapi based tool has been written to be able
test the copy_file_range fop. This tool is similar (in functionality)
to the example program given in copy_file_range man page.
So, running regular copy_file_range on a fuse mount point and
running gfapi based glfs-copy-file-range tool gives some idea about
how fast, the copy_file_range (or reflink) can be.
On the local machine this was the result obtained.
mount -t glusterfs workstation:new /mnt/glusterfs
[root@workstation ~]# cd /mnt/glusterfs/
[root@workstation glusterfs]# ls
file
[root@workstation glusterfs]# cd
[root@workstation ~]# time /tmp/a.out /mnt/glusterfs/file /mnt/glusterfs/new
real 0m6.495s
user 0m0.000s
sys 0m1.439s
[root@workstation ~]# time glfs-copy-file-range $(hostname) new /tmp/glfs.log /file /rrr
OPEN_SRC: opening /file is success
OPEN_DST: opening /rrr is success
FSTAT_SRC: fstat on /rrr is success
copy_file_range successful
real 0m0.309s
user 0m0.039s
sys 0m0.017s
This tool needs following arguments
1) hostname
2) volume name
3) log file path
4) source file path (relative to the gluster volume root)
5) destination file path (relative to the gluster volume root)
"glfs-copy-file-range <hostname> <volume> <log file path> <source> <destination>"
- Added a testcase as well to run glfs-copy-file-range tool
* io-stats changes to capture the fop for profiling
* NOTE:
- Added conditional check to see whether the copy_file_range syscall
is available or not. If not, then return ENOSYS.
- Added conditional check for kernel minor version in fuse_kernel.h
and fuse-bridge while referring to copy_file_range. And the kernel
minor version is kept as it is. i.e. 24. Increment it in future
when there is a kernel release which contains the support for
copy_file_range fop in fuse kernel module.
* The document which contains a writeup on this enhancement can be found at
https://docs.google.com/document/d/1BSILbXr_knynNwxSyyu503JoTz5QFM_4suNIh2WwrSc/edit
Change-Id: I280069c814dd21ce6ec3be00a884fc24ab692367
updates: #536
Signed-off-by: Raghavendra Bhat <raghavendra@redhat.com>
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The include path in glusterfs-api.pc looks like
-I${includedir}/glusterfs
However, client code will include the glusterfs headers using
#include <glusterfs/api/glfs.h>
rather than
#include <api/glfs.h>
which makes the "/glusterfs" part entirely unnecessary.
More importantly, on some platforms such as FreeBSD, the header files
for glusterfs will be installed in /usr/local/include, which is *not*
part of the compiler's default include path, so compilation will fail
with something like
fatal error: 'glusterfs/api/glfs.h' file not found
#include <glusterfs/api/glfs.h>
^~~~~~~~~~~~~~~~~~~~~~
The fix is to simply drop the extra "/glusterfs". The same change
is applied to other *.pc files as well, althought I haven't actually
tested those.
A test program (gfapi-load-volfile) and the glfsxmp example
application were using the wrong include paths, so they had to be
fixed as well.
Change-Id: I9a16de47fee7ab9c12d1cb823bbe061a69352670
BUG: 1508947
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
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On Linux systems we should use the libuuid from the distribution and not
bundle and statically link the contrib/uuid/ bits.
libglusterfs/src/compat-uuid.h has been introduced and should become an
abstraction layer for different UUID APIs. Non-Linux operating systems
should implement their compatibility layer there.
Once all operating systems have an implementation in compat-uuid.h, we
can remove contrib/uuid/ from the repository completely.
Change-Id: I345e5357644be2521685e00358bb8c83c4ea0577
BUG: 1206587
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/10129
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
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According to libtool three individual numbers stand for
CURRENT:REVISION:AGE, or C:R:A for short. The libtool
script typically tacks these three numbers onto the end
of the name of the .so file it creates. The formula for
calculating the file numbers on Linux and Solaris is
/path/to/library/<library_name>.(C - A).(A).(R)
As you release new versions of your library, you will
update the library's C:R:A. Although the rules for changing
these version numbers can quickly become confusing, a few
simple tips should help keep you on track. The libtool
documentation goes into greater depth.
In essence, every time you make a change to the library and
release it, the C:R:A should change. A new library should start
with 0:0:0. Each time you change the public interface
(i.e., your installed header files), you should increment the
CURRENT number. This is called your interface number. The main
use of this interface number is to tag successive revisions
of your API.
The AGE number is how many consecutive versions of the API the
current implementation supports. Thus if the CURRENT library
API is the sixth published version of the interface and it is
also binary compatible with the fourth and fifth versions
(i.e., the last two), the C:R:A might be 6:0:2. When you break
binary compatibility, you need to set AGE to 0 and of course
increment CURRENT.
The REVISION marks a change in the source code of the library
that doesn't affect the interface-for example, a minor bug fix.
Anytime you increment CURRENT, you should set REVISION back to 0.
Change-Id: Id72e74c1642c804fea6f93ec109135c7c16f1810
BUG: 862082
Signed-off-by: Harshavardhana <harsha@harshavardhana.net>
Reviewed-on: http://review.gluster.org/5645
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
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Change-Id: Icdd23f1c31421c882db106cdad1b1406569594ca
BUG: 1002220
Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>
Reviewed-on: http://review.gluster.org/5717
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>
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This is the initial version of the Changelog Translator.
What is it
-----------
Goal is to capture changes performed on a GlusterFS volume.
The translator needs to be loaded on the server (bricks) and
captures changes in a plain text file inside a configured
directory path (controlled by "changelog-dir", should be
somewhere in <export>/.glusterfs/changelog by default).
Changes are classified into 3 types:
- Data: : TYPE-I
- Metadata : TYPE-II
- Entry : TYPE-III
Changelog file is rolled over after a certain time interval
(defauls to 60 seconds) after which a changelog is started.
The thing to be noted here is that for a time interval
(time slice) multiple changes for an inode are recorded only
once (ie. say for 100+ writes on an inode that happens within
the time slice has only a single corresponding entry in the
changelog file). That way we do not bloat up the changelog
and also save lots of writes.
Changelog Format
-----------------
TYPE-I and TYPE-II changes have the gfid on the entity on
which the operation happened. TYPE-III being a entry op
requires the parent gfid and the basename. Changelog format
has been kept to a minimal and it's upto the consumers to
do the heavy loading of figuring out deletes, renames etc..
A single changelog file records all three types of changes,
with each change starting with an identifier ("D": DATA,
"M": METADATA and "E": ENTRY). Option is provided for the
encoding type (See TUNABLES).
Consumers
----------
The only consumer as of today would be geo-replication, although
backup utilities, self-heal, bit-rot detection could be possible
consumers in the future.
CLI
----
By default, change-logging is disabled (the translator is present
in the server graph but does nothing). When enabled (via cli) each
brick starts to log the changes. There are a set of tunable that
can be used to change the translators behaviour:
- enable/disable changelog (disabled by default)
gluster volume set <volume> changelog {on|off}
- set the logging directory (<brick>/.glusterfs/changelogs is the
default)
gluster volume set <volume> changelog-dir /path/to/dir
- select encoding type (binary (default) or ascii)
gluster volume set <volume> encoding {binary|ascii}
- change the rollover time for the logs (60 secs by default)
gluster volume set <volume> rollover-time <secs>
- when secs > 0, changelog file is not open()'d with O_SYNC flag
- and fsync is trigerred periodically every <secs> seconds.
gluster volume set <volume> fsync-interval <secs>
features/changelog: changelog consumer library (libgfchangelog)
A shared library is provided for the consumer of the changelogs
for easy acess via APIs. Application can link against this library
and request for changelog updates. Conversion of binary logs to
human-readable ascii format is also taken care by the library which
keeps a copy of the changelog in application provided working
directory.
Change-Id: I75575fb7f1c53d2bec3dba1a329ea7bb3c628497
BUG: 847839
Original Author: Venky Shankar <vshankar@redhat.com>
Signed-off-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-on: http://review.gluster.org/5127
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
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