From 48223d8815de78c178861e38703bddd0bbab978b Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Fri, 28 Nov 2014 17:43:38 -0500
Subject: [PATCH] SPARK-1450 [EC2] Specify the default zone in the EC2 script
 help

This looks like a one-liner, so I took a shot at it. There can be no fixed default availability zone since the names are different per region. But the default behavior can be documented:

```
    if opts.zone == "":
        opts.zone = random.choice(conn.get_all_zones()).name
```

Author: Sean Owen <sowen@cloudera.com>

Closes #3454 from srowen/SPARK-1450 and squashes the following commits:

9193cf3 [Sean Owen] Document that --zone defaults to a single random zone
---
 ec2/spark_ec2.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ec2/spark_ec2.py b/ec2/spark_ec2.py
index a4ab844a56..742c7765e7 100755
--- a/ec2/spark_ec2.py
+++ b/ec2/spark_ec2.py
@@ -86,7 +86,7 @@ def parse_args():
         "-z", "--zone", default="",
         help="Availability zone to launch instances in, or 'all' to spread " +
              "slaves across multiple (an additional $0.01/Gb for bandwidth" +
-             "between zones applies)")
+             "between zones applies) (default: a single zone chosen at random)")
     parser.add_option("-a", "--ami", help="Amazon Machine Image ID to use")
     parser.add_option(
         "-v", "--spark-version", default=DEFAULT_SPARK_VERSION,
-- 
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