Embulkで、カラムの数が多いデータをプレビューする場合は-Gオプションを使いましょう。
-Gを使わない出力
とても見にくいです。
embulk preview conf.yml
2016-05-30 17:27:35.682 +0900: Embulk v0.8.9
2016-05-30 17:27:37.207 +0900 [INFO] (0001:preview): Loaded plugin embulk-input-apache-dummy-log (0.1.0)
+--------------------+-----------------------+-------------+-----------------------------+---------------+---------------------------------+-----------------+-------------+-----------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| remote_host:string | identity_check:string | user:string | datetime:timestamp | method:string | path:string | protocol:string | status:long | size:long | referer:string | user_agent:string |
+--------------------+-----------------------+-------------+-----------------------------+---------------+---------------------------------+-----------------+-------------+-----------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 80.180.78.98 | - | - | 2016-05-30 08:27:37.346 UTC | GET | /category/sports | HTTP/1.1 | 200 | 76 | - | Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:9.0.1) Gecko/20100101 Firefox/9.0.1 |
| 128.150.88.24 | - | - | 2016-05-30 08:27:37.352 UTC | GET | /item/networking/1497 | HTTP/1.1 | 200 | 104 | /search/?c=Sports | Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7 |
-Gオプションを使うと
データを1行、1カラムで表示するのでこのようなデータでは確認がしやすいです。
embulk preview -G /tmp/conf.yml
*************************** 1 ***************************
remote_host ( string) : 88.60.125.96
identity_check ( string) : -
user ( string) : -
datetime (timestamp) : 2016-05-30 08:27:48.244 UTC
method ( string) : GET
path ( string) : /item/cameras/183
protocol ( string) : HTTP/1.1
status ( long) : 200
size ( long) : 73
referer ( string) : -
user_agent ( string) : Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; YTB730; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)
*************************** 2 ***************************
remote_host ( string) : 60.210.201.133
identity_check ( string) : -
user ( string) : -
datetime (timestamp) : 2016-05-30 08:27:48.250 UTC
method ( string) : GET
path ( string) : /category/software
protocol ( string) : HTTP/1.1
status ( long) : 200
size ( long) : 135
referer ( string) : -
user_agent ( string) : Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:9.0.1) Gecko/20100101 Firefox/9.0.1
*************************** 3 ***************************
remote_host ( string) : 144.78.182.90
identity_check ( string) : -
user ( string) : -
datetime (timestamp) : 2016-05-30 08:27:48.253 UTC
method ( string) : GET
path ( string) : /category/toys
protocol ( string) : HTTP/1.1
status ( long) : 200
size ( long) : 133
referer ( string) : /item/software/3978
user_agent ( string) : Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:9.0.1) Gecko/20100101 Firefox/9.0.1