Lukas Waldmann commented on HADOOP-14444:

Sources and builds of standalone filesystem jars for different Hadoop versions 
available here:


Should make it easier to test. Let me know if you have problem getting access 
and of course any issues you come accross 

> New implementation of ftp and sftp filesystems
> ----------------------------------------------
>                 Key: HADOOP-14444
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14444
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs
>    Affects Versions: 2.8.0
>            Reporter: Lukas Waldmann
>            Assignee: Lukas Waldmann
>            Priority: Major
>         Attachments: HADOOP-14444.10.patch, HADOOP-14444.11.patch, 
> HADOOP-14444.12.patch, HADOOP-14444.13.patch, HADOOP-14444.14.patch, 
> HADOOP-14444.15.patch, HADOOP-14444.2.patch, HADOOP-14444.3.patch, 
> HADOOP-14444.4.patch, HADOOP-14444.5.patch, HADOOP-14444.6.patch, 
> HADOOP-14444.7.patch, HADOOP-14444.8.patch, HADOOP-14444.9.patch, 
> HADOOP-14444.patch
> Current implementation of FTP and SFTP filesystems have severe limitations 
> and performance issues when dealing with high number of files. Mine patch 
> solve those issues and integrate both filesystems such a way that most of the 
> core functionality is common for both and therefore simplifying the 
> maintainability.
> The core features:
>  * Support for HTTP/SOCKS proxies
>  * Support for passive FTP
>  * Support for explicit FTPS (SSL/TLS)
>  * Support of connection pooling - new connection is not created for every 
> single command but reused from the pool.
>  For huge number of files it shows order of magnitude performance improvement 
> over not pooled connections.
>  * Caching of directory trees. For ftp you always need to list whole 
> directory whenever you ask information about particular file.
>  Again for huge number of files it shows order of magnitude performance 
> improvement over not cached connections.
>  * Support of keep alive (NOOP) messages to avoid connection drops
>  * Support for Unix style or regexp wildcard glob - useful for listing a 
> particular files across whole directory tree
>  * Support for reestablishing broken ftp data transfers - can happen 
> surprisingly often
>  * Support for sftp private keys (including pass phrase)
>  * Support for keeping passwords, private keys and pass phrase in the jceks 
> key stores

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