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authorAmar Tumballi <amar@gluster.com>2010-03-25 01:44:17 +0000
committerAnand V. Avati <avati@dev.gluster.com>2010-03-25 05:49:19 -0700
commit4cb614047e4c9180d2960d06675f46d7504bb1e0 (patch)
treeedeb299ec30895569ae618bb83e1c0205e51d92f
parentda47fe9a400dbc811327d4fb8e754c47dbdeaccc (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.py33
1 files changed, 16 insertions, 17 deletions
diff --git a/extras/volgen/CreateVolfile.py b/extras/volgen/CreateVolfile.py
index 208b7f7..36c2ab9 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")