diff options
| author | Amar Tumballi <amar@gluster.com> | 2010-03-25 01:44:17 +0000 |
|---|---|---|
| committer | Anand V. Avati <avati@dev.gluster.com> | 2010-03-25 05:49:19 -0700 |
| commit | 4cb614047e4c9180d2960d06675f46d7504bb1e0 (patch) | |
| tree | edeb299ec30895569ae618bb83e1c0205e51d92f | |
| parent | da47fe9a400dbc811327d4fb8e754c47dbdeaccc (diff) | |
changed the order of write-behind - read-ahead in volgen.v3.0.4rc2
Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
BUG: 740 (read-ahead does not work to its full potential when loaded on top of write-behind)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=740
| -rw-r--r-- | extras/volgen/CreateVolfile.py | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/extras/volgen/CreateVolfile.py b/extras/volgen/CreateVolfile.py index 208b7f72bf8..36c2ab9e078 100644 --- a/extras/volgen/CreateVolfile.py +++ b/extras/volgen/CreateVolfile.py @@ -164,28 +164,16 @@ class CreateVolfile: mount_fd.write (" subvolumes %s\n" % subvolumes[0]) mount_fd.write ("end-volume\n\n") - - mount_fd.write ("volume writebehind\n") - mount_fd.write (" type performance/write-behind\n") - mount_fd.write (" option cache-size 4MB\n") - if self.unused: - mount_fd.write ("# option enable-trickling-writes yes # Flush final write calls when network is free\n") - mount_fd.write ("# option enable-O_SYNC yes # Enable O_SYNC for write-behind\n") - mount_fd.write ("# option disable-for-first-nbytes 1 # Disable first nbytes with very small initial writes\n") - if self.volume_size_client: - mount_fd.write (" subvolumes quota\n") - else: - mount_fd.write (" subvolumes %s\n" % subvolumes[0]) - - mount_fd.write ("end-volume\n\n") - mount_fd.write ("volume readahead\n") mount_fd.write (" type performance/read-ahead\n") mount_fd.write (" option page-count 4\n") if self.unused: mount_fd.write ("# option force-atime-update yes # force updating atimes, default off\n") - mount_fd.write (" subvolumes writebehind\n") + if self.volume_size_client: + mount_fd.write (" subvolumes quota\n") + else: + mount_fd.write (" subvolumes %s\n" % subvolumes[0]) mount_fd.write ("end-volume\n\n") mount_fd.write ("volume iocache\n") @@ -204,9 +192,20 @@ class CreateVolfile: mount_fd.write (" subvolumes iocache\n") mount_fd.write ("end-volume\n\n") + mount_fd.write ("volume writebehind\n") + mount_fd.write (" type performance/write-behind\n") + mount_fd.write (" option cache-size 4MB\n") + if self.unused: + mount_fd.write ("# option enable-trickling-writes yes # Flush final write calls when network is free\n") + mount_fd.write ("# option enable-O_SYNC yes # Enable O_SYNC for write-behind\n") + mount_fd.write ("# option disable-for-first-nbytes 1 # Disable first nbytes with very small initial writes\n") + + mount_fd.write (" subvolumes quickread\n") + mount_fd.write ("end-volume\n\n") + mount_fd.write ("volume statprefetch\n") mount_fd.write (" type performance/stat-prefetch\n") - mount_fd.write (" subvolumes quickread\n") + mount_fd.write (" subvolumes writebehind\n") mount_fd.write ("end-volume\n\n") |