updates: bz#1693692 Change-Id: If69702990af273be1f38855ba56b3b89fabff167 Signed-off-by: Amar Tumballi <amarts@redhat.com>
This patch implements a thread pool that is wait-free for adding jobs to the queue and uses a very small locked region to get jobs. This makes it possible to decrease contention drastically. It's based on wfcqueue structure provided by urcu library. It automatically enables more threads when load demands it, and stops them when not needed. There's a maximum number of threads that can be used. This value can be configured. Depending on the workload, the maximum number of threads plays an important role. So it needs to be configured for optimal performance. Currently the thread pool doesn't self adjust the maximum for the workload, so this configuration needs to be changed manually. For this reason, the global thread pool has been made optional, so that volumes can still use the thread pool provided by io-threads. To enable it for bricks, the following option needs to be set: config.global-threading = on This option has no effect if bricks are already running. A restart is required to activate it. It's recommended to also enable the following option when running bricks with the global thread pool: performance.iot-pass-through = on To enable it for a FUSE mount point, the option '--global-threading' must be added to the mount command. To change it, an umount and remount is needed. It's recommended to disable the following option when using global threading on a mount point: performance.client-io-threads = off To enable it for services managed by glusterd, glusterd needs to be started with option '--global-threading'. In this case all daemons, like self-heal, will be using the global thread pool. Currently it can only be enabled for bricks, FUSE mounts and glusterd services. The maximum number of threads for clients and bricks can be configured using the following options: config.client-threads config.brick-threads These options can be applied online and its effect is immediate most of the times. If one of them is set to 0, the maximum number of threads will be calcutated as #cores * 2. Some distributions use a very old userspace-rcu library (version 0.7) for this reason, some header files from version 0.10 have been copied into contrib/userspace-rcu and are used if the detected version is 0.7 or older. An additional change has been made to io-threads to prevent that threads are started when iot-pass-through is set. Change-Id: I09d19e246b9e6d53c6247b29dfca6af6ee00a24b updates: #532 Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
* 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>
libglusterfs devel package headers are referenced in code using include semantics for a program, this while it works can be better especially when dealing with out of tree xlator builds or in general out of tree devel package usage. Towards this, the following changes are done, - moved all devel headers under a glusterfs directory - Included these headers using system header notation <> in all code outside of libglusterfs - Included these headers using own program notation "" within libglusterfs This change although big, is just moving around the headers and making it correct when including these headers from other sources. This helps us correctly include libglusterfs includes without namespace conflicts. Change-Id: Id2a98854e671a7ee5d73be44da5ba1a74252423b Updates: bz#1193929 Signed-off-by: ShyamsundarR <srangana@redhat.com>
gf_mkostemp is borrowed from GLibC a long time back, we now have mkostemp or mkstemp alternatives with all distributions and versions that we care for. As a result removing this from the contrib directory and modifying the one instance that is still using the same. This is part of code cleanup as we cleaned up coverity SECUR_TEMP errors. Updates: bz#1193929 Change-Id: I1ad7863043cdb0845c53748f5a0522e767079130 Signed-off-by: ShyamsundarR <srangana@redhat.com>
Update to latest xxHash, which is supposed to faster with small keys. Specifically, updated to 3064d42e7d74b0921bdd1818395d9cb37bb8976a, which is a bit higher than 0.6.5. Compiled hopefully with namespace (XXH_NAMESPACE=GF_), which allows to use XXH() funcs with no fear they'll 'leak' from our library. Only compile tested! xxhsum is modified to display messages which was conflicting with regression tests (TAP harness). So modified the gfid2path_fuse.t and gfid2path_nfs.t to adhere to that. updates: bz#1193929 Signed-off-by: Yaniv Kaul <ykaul@redhat.com> Change-Id: I35cea5cc93f338c1023ac2c9bc6d7d13225a967b
Bundling libuuid is not needed anymore, all current distributions provide it now. Some OS's provide their own uuid_*() functions in libc. These may not be fully compatible with libuuid.so found on Linux systems. In that case, either e2fsprogs-libuuid can be installed, or support for the native uuid_*() functions can be added to libglusterfs/src/compat-uuid.h. Change-Id: Icfa48caea81307a3bca549364969c2038911942b Fixes: bz#1607319 Signed-off-by: Niels de Vos <ndevos@redhat.com>
Newer FreeBSD versions (noticed with 10.3-RELEASE) provide a event.h
file that on occasion gets included instead of the libglusterfs file.
When this happens, 'struct event_pool' will not be defined and building
will fail with errors like:
autoscale-threads.c:18:55: error: incomplete definition of type 'struct event_pool'
int thread_count = pool->eventthreadcount;
~~~~^
autoscale-threads.c:17:16: note: forward declaration of 'struct event_pool'
struct event_pool *pool = ctx->event_pool;
^
This problem is caused by 'pkg-config --cflags uuid' that adds
/usr/local/include to the GF_CPPFLAGS. The use of libuuid is preferred
so that the contrib/uuid/ directory can be removed.
By renaming event.h to gf-event.h there is no conflict between the
different event.h files anymore and compiling on FreeBSD works without
issues.
Change-Id: Ie69f6b8a4f8f8e9630d39a86693eb74674f0f763
Updates: bz#1607319
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Another error snuck in with Change-Id I86f847dfd, or more accurately I think, with Change-Id: Ic47065e9c2... All libs, not just libgfrpc, need to be linked with libtirpc, especially on systems that still have xdr functions in (g)libc where you will get a mixture of calls to libtirpc functions and glibc functions, with catastrophic results. BUG: 1536186 Change-Id: I97dc39c7844f44c36fe210aa813480c219e1e415 Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>
minimize risk of symbol collisions in global namespace. see https://review.gluster.org/#/c/5697/ which Amar has resurrected. This is a strawman proposal to use an export-list to only export the necessary symbols from libglusterfs. I suppose some of this could be fixed by smarter use of static in the function definitions. It's a bit scary to see some of the names we expose. And then there are the names we use in the reserved namespace. One step short of going all the way to symbol versions fixes gluster/glusterfs#382 Change-Id: Ifb848dfc655ef735dd27c73b7729e1188eb817f1 Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>