[Discuss] bash output buffering

[jack at coats.org (Jack Coats)]

In old SunOS days, we could issue the 'sync' command, twice, to ensure
all system
buffers had been written to disk.  You could experiment to see if
issuing it occasionally
in your script helps.  Or issue it outside the script, even in a chron
might help.
><> ... Jack
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On Tue, Jun 12, 2012 at 6:25 PM, Richard Pieri <richard.pieri at gmail.com> wrote:
> On Jun 12, 2012, at 7:01 PM, Edward Ned Harvey wrote:
>>
>> I have a bash script, writing to a log file, and there's a long delay before
>> the output appears in the file. ?When it does, it appears several K at a
>> time.
>
> This isn't bash. ?It's file I/O buffering. ?Solutions are either mount the file system sync or pipe the output through a filter that disables output buffering. "cat -u" will do the latter.
>
> --Rich P.
>
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