diff options
author | Mohit Agrawal <moagrawal@redhat.com> | 2019-12-19 08:32:19 +0530 |
---|---|---|
committer | Xavi Hernandez <xhernandez@redhat.com> | 2020-04-06 10:43:26 +0000 |
commit | f2d90013aaa4652dbcc1e6e3d62a0d31ada89d5d (patch) | |
tree | 6a7fc163392ab73d05204c0d7b9fc333135cc062 /libglusterfs/src/glusterfs/syscall.h | |
parent | 28299f7852229be333102e08aae9b7fd4ad3338a (diff) |
Posix: Optimize posix code to improve file creation
Problem: Before executing a fop in POSIX xlator it builds an internal
path based on GFID.To validate the path it call's (l)stat
system call and while .glusterfs is heavily loaded kernel takes
time to lookup inode and due to that performance drops
Solution: In this patch we followed two ways to improve the performance.
1) Keep open fd specific to first level directory(gfid[0])
in .glusterfs, it would force to kernel keep the inodes
from all those files in cache. In case of memory pressure
kernel won't uncache first level inodes. We need to open
256 fd's per brick to access the entry faster.
2) Use at based call's to access relative path to reduce
path based lookup time.
Note: To verify the patch we have executed kernel untar 100 times on 6
different clients after enabling metadata group-cache and some
other option.We were getting more than 20 percent improvement in
kenel untar after applying the patch.
Credits: Xavi Hernandez <xhernandez@redhat.com>
Change-Id: I1643e6b01ed669b2bb148d02f4e6a8e08da45343
updates: #891
Signed-off-by: Mohit Agrawal <moagrawal@redhat.com>
Diffstat (limited to 'libglusterfs/src/glusterfs/syscall.h')
-rw-r--r-- | libglusterfs/src/glusterfs/syscall.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libglusterfs/src/glusterfs/syscall.h b/libglusterfs/src/glusterfs/syscall.h index 6b33c141a5e..91e921aea50 100644 --- a/libglusterfs/src/glusterfs/syscall.h +++ b/libglusterfs/src/glusterfs/syscall.h @@ -96,18 +96,27 @@ int sys_unlink(const char *pathname); int +sys_unlinkat(int dfd, const char *pathname); + +int sys_rmdir(const char *pathname); int sys_symlink(const char *oldpath, const char *newpath); int +sys_symlinkat(const char *oldpath, int dirfd, const char *newpath); + +int sys_rename(const char *oldpath, const char *newpath); int sys_link(const char *oldpath, const char *newpath); int +sys_linkat(int oldfd, const char *oldpath, int newfd, const char *newpath); + +int sys_chmod(const char *path, mode_t mode); int |