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From "Ari Rabkin (JIRA)" <>
Subject [jira] Commented: (CHUKWA-185) ability to tail a whole directory
Date Mon, 15 Jun 2009 20:36:07 GMT


Ari Rabkin commented on CHUKWA-185:

What I was planning to do was this.  DTA takes a time cut-off, and will not stream files last
modified before the cutoff.  So if you specify the epoch, you get everything.  Whenever DTA
does a scan of the directory, it updates that cutoff to the time when the scan started.  So
for a file that isn't being modified, DTA will start tailing it at most once.  

Time windowing for shutdown should be addressed by CHUKWA-204.

It might be reasonable to build a command line tool or script that stops all FTAs in a given
subdirectory.  There's no need for that to be coupled to this patch in any way.  But I think
we should have real use cases before we hack on it.

> ability to tail a whole directory
> ---------------------------------
>                 Key: CHUKWA-185
>                 URL:
>             Project: Hadoop Chukwa
>          Issue Type: New Feature
>          Components: data collection
>    Affects Versions: 0.1.2, 0.2.0
>            Reporter: Ari Rabkin
>            Assignee: Ari Rabkin
>             Fix For: 0.3.0
>         Attachments: CHUKWA-185.patch
> Right now, FileTailingAdaptors watch particular files.   It'd be great to be able to
watch a whole path: to say something like /var/logs/*, where new logs created in that directory
get picked up.

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