On Apr 20, 2009, at 10:03 PM, Kevin Constantine wrote:
Print statistics about bytes written by NFS
Signed-off-by: Kevin Constantine <kevin.constantine@xxxxxxxxxxxxxxxxxxx
>
---
tools/nfs-iostat/nfs-iostat.py | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/tools/nfs-iostat/nfs-iostat.py b/tools/nfs-iostat/nfs-
iostat.py
index d331a72..5f2e232 100644
--- a/tools/nfs-iostat/nfs-iostat.py
+++ b/tools/nfs-iostat/nfs-iostat.py
@@ -221,6 +221,7 @@ class DeviceData:
"""
nfs_stats = self.__nfs_data
app_bytes_read = float(nfs_stats['normalreadbytes'] +
nfs_stats['directreadbytes'])
+ bytes_written_by_app = float(nfs_stats['normalwritebytes']
+ nfs_stats['directwritebytes'])
if app_bytes_read != 0:
read_bytes_from_server =
float(nfs_stats['serverreadbytes'])
directio_bytes_from_server =
float(nfs_stats['directreadbytes'])
@@ -234,6 +235,15 @@ class DeviceData:
cached_read_bytes / 1024.0 / 1024.0, \
app_bytes_read / 1024.0 / 1024.0, \
ratio)
+ if bytes_written_by_app != 0:
+ bytes_written_by_nfs = float(nfs_stats['serverwritebytes'])
+ cached_write_bytes = float(bytes_written_by_app -
bytes_written_by_nfs);
Again, I don't see why this computation is necessary: The
"normalwritebytes" statistic is what was written through the client's
cache, and "directwritebytes" counts the number of bytes that were
written via O_DIRECT.
+ print
+ print '%13s %12s %15s %15s' % ("Data Written:", "To
Server", "To Cache", "Total")
+ print '%10s %13.4fMB %13.4fMB %13.4fMB' % ("", \
+ bytes_written_by_nfs / 1024.0 / 1024.0, \
+ cached_write_bytes / 1024.0 / 1024.0, \
+ bytes_written_by_app / 1024.0 / 1024.0)
def __print_attr_cache_stats(self, sample_time):
"""Print attribute cache efficiency stats
--
1.6.2.1
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--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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