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Hongyuan Li edited comment on HADOOP-14444 at 7/3/17 3:40 PM: -------------------------------------------------------------- should this property be identified by host or something ? like {{fs.<scheme>.<host>.<directories>.cache.enabled}}. I'm not good at naming properties. *Update* i suggest use {{redis}} or {{LevelDB}} to implement th de {{dirTree}}, which is seen by all process that staring at this progress. was (Author: hongyuan li): should this property be identified by host or something ? like {{fs.<scheme>.<host>.<directories>.cache.enabled}}. I'm not good at naming properties. > 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 > Attachments: HADOOP-14444.2.patch, HADOOP-14444.3.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 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 -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org