diff options
| author | Pranith Kumar K <pkarampu@redhat.com> | 2018-03-19 15:12:14 +0530 |
|---|---|---|
| committer | Pranith Kumar K <pkarampu@redhat.com> | 2018-03-21 10:36:31 +0530 |
| commit | 2da6650dfa402143c7b9ea0e67bbda79d0475ddd (patch) | |
| tree | 4b778625eaded65bfe998ce8cbcc69e9ce69b4d1 /libglusterfs/src/inode.h | |
| parent | ade6262cb63b96834dce101a4a237c0c8128077e (diff) | |
storage/posix: Add active-fd-count option in gluster
Problem:
when dd happens on sharded replicate volume all the writes on shards happen
through anon-fd. When the writes don't come quick enough, old anon-fd closes
and new fd gets created to serve the new writes. open-fd-count is decremented
only after the fd is closed as part of fd_destroy(). So even when one fd is on
the way to be closed a new fd will be created and during this short period it
appears as though there are multiple fds opened on the file. AFR thinks another
application opened the same file and switches off eager-lock leading to
extra latency.
Fix:
Have a different option called active-fd whose life cycle starts at
fd_bind() and ends just before fd_destroy()
BUG: 1557932
Change-Id: I2e221f6030feeedf29fbb3bd6554673b8a5b9c94
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Diffstat (limited to 'libglusterfs/src/inode.h')
| -rw-r--r-- | libglusterfs/src/inode.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libglusterfs/src/inode.h b/libglusterfs/src/inode.h index a1b238041b4..f77778ff3ad 100644 --- a/libglusterfs/src/inode.h +++ b/libglusterfs/src/inode.h @@ -92,6 +92,7 @@ struct _inode { gf_lock_t lock; uint64_t nlookup; uint32_t fd_count; /* Open fd count */ + uint32_t active_fd_count; /* Active open fd count */ uint32_t ref; /* reference count on this inode */ ia_type_t ia_type; /* what kind of file */ struct list_head fd_list; /* list of open files on this inode */ |