Rename rand_readwrite to readwrite.

Simpler, and all the benchmarks are pretty much as pseudorandom,
in the end; that's not a relevant characteristic. The mix of read
and write operations is.

Re-run ./bootstrap to get the s3tests-test-readwrite script
regenerated to refer to the new module name.

config.yaml.SAMPLE

@@ -17,7 +17,7 @@ file_generation:
 ## single bucket for a set duration.
 ## Note: the readwrite tool does not need the s3.alt connection info.
 ## only s3.main is used.
-rand_readwrite:
+readwrite:
 ## The number of reader and writer worker threads. This sets how many
 ## files will be read and written concurrently.
   readers: 2

s3tests/readwrite.py

@@ -134,15 +134,15 @@ def main():
         common.setup()
 
         # verify all required config items are present
-        if 'rand_readwrite' not in common.config:
-            raise RuntimeError('rand_readwrite section not found in config')
-        config = common.config.rand_readwrite
+        if 'readwrite' not in common.config:
+            raise RuntimeError('readwrite section not found in config')
+        config = common.config.readwrite
         for item in ['readers', 'writers', 'duration', 'files']:
             if item not in config:
-                raise RuntimeError("Missing rand_readwrite config item: {item}".format(item=item))
+                raise RuntimeError("Missing readwrite config item: {item}".format(item=item))
         for item in ['num', 'size', 'stddev']:
             if item not in config.files:
-                raise RuntimeError("Missing rand_readwrite config item: files.{item}".format(item=item))
+                raise RuntimeError("Missing readwrite config item: files.{item}".format(item=item))
 
         # setup bucket and other objects
         bucket = common.get_new_bucket()

setup.py

@@ -22,7 +22,7 @@ setup(
     entry_points={
         'console_scripts': [
             's3tests-generate-objects = s3tests.generate_objects:main',
-            's3tests-test-readwrite = s3tests.rand_readwrite:main',
+            's3tests-test-readwrite = s3tests.readwrite:main',
             's3tests-test-roundtrip = s3tests.roundtrip:main',
             ],
         },