[HDFS-1303] StreamFile.doGet(..) uses an additional RPC to get file length

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Component/s: datanode
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 16/Jul/10 02:13
• Updated: 19/Jul/10 21:04
• Resolved: 19/Jul/10 21:04

Description

//StreamFile.doGet(..)
    long fileLen = dfs.getFileInfo(filename).getLen();
    FSInputStream in = dfs.open(filename);

In the codes above, t is unnecessary to call getFileInfo(..), which is an additional RPC to namenode. The file length can be obtained from the input stream after open(..).

Issue Links

• is part of: HDFS-1085 hftp read failing silently