Re: bad news for bsdtar..

From: Alfred Perlstein (alfred_at_freebsd.org)
Date: 04/24/04

  • Next message: Richard Coleman: "Re: bad news for bsdtar.." 
    Date: Sat, 24 Apr 2004 08:18:39 -0700
To: Alexey Dokuchaev <danfe@nsu.ru>

    * Alexey Dokuchaev <danfe@nsu.ru> [040424 03:14] wrote:
    > On Sat, Apr 24, 2004 at 01:59:13AM -0700, Alfred Perlstein wrote:
    > >
    > > Have you guys thought of using aio or at least another process
    > > to parallelize IO? (One to read files, and one to write out the
    > > archive)
    > >
    > > Actually with our kernel threads in 5 you could just use those
    > > to speed IO.
    >
    > IMHO, still non-blocking/async IO would be faster, and more probably portable,
    > unless I'm utterly wrong, of course. 8-)

    Threads are pretty portable these days, obviously making it a compile
    time option could work, but then again performance would be nice
    and it is _our_ tar. ;)

    Also, unless you mean 'aio' or 'another process' by "non-blocking/async
    IO" then I'm pretty sure you are wrong, as there is no other way
    to do this, disk based files do not really support SIGIO (async IO)
    or non-blocking IO (NBIO). 

    -- 
- Alfred Perlstein
- Research Engineering Development Inc.
- email: bright@mu.org cell: 408-480-4684
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  • Next message: Richard Coleman: "Re: bad news for bsdtar.."

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