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From "James Clampffer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9679) libhdfs++: Implement lseek in the extended C API
Date Thu, 21 Jan 2016 23:06:39 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Clampffer updated HDFS-9679:
----------------------------------
    Description: It'd be nice to have a version of hdfsSeek that returns the new offset as
a 64 bit int similar to a posix lseek.  The underlying C++ implementation already does this
for free and doing a seek with whence=SEEK_CUR and then checking the resulting offset seems
like a common operation.  (was: hdfsSeek and hdfsTell in the libhdfs API return int while
libhdfs++ uses int64_t internally.  When seeking to the end of very large files the 64->32
bit narrowing operation done by the bindings gives offset mod 2^32 rather than the offset.

hdfsSeek64 and hdfsTell64 need to be added to the extended C API to avoid these issues.)

> libhdfs++: Implement lseek in the extended C API
> ------------------------------------------------
>
>                 Key: HDFS-9679
>                 URL: https://issues.apache.org/jira/browse/HDFS-9679
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>            Reporter: James Clampffer
>            Assignee: James Clampffer
>
> It'd be nice to have a version of hdfsSeek that returns the new offset as a 64 bit int
similar to a posix lseek.  The underlying C++ implementation already does this for free and
doing a seek with whence=SEEK_CUR and then checking the resulting offset seems like a common
operation.



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