[OmniOS-discuss] CIFS ignores TCP Buffer Settings

[Mini Trader]

Simple example.

1 Server 1 client.

Restart service everything is fast.  A few hours later from same client
(nothing happening concurrently) speed is slow.  Restart service again,
speed is fast.

Its like CIFS starts off fast than somehow for whatever reason if it is not
used, the connection for my CIFS drives to the server becomes slow.  Also
this only happens when the client is downloading.  Not when uploading to
the server that is always fast.

On Tue, Mar 8, 2016 at 1:42 AM, Jim Klimov <jimklimov at cos.ru> wrote:

> 8 марта 2016 г. 6:42:13 CET, Mini Trader <miniflowtrader at gmail.com> пишет:
> >Is it possible that CIFS will ignore TCP buffer settings after a while?
> >
> >I've confirmed my systems max transfer rate using iperf and have tuned
> >my
> >buffers accordingly. For whatever reason CIFS seems to forget these
> >settings after a while as speed drops significantly. Issuing a restart
> >of
> >the service immediately appears to restore the setting as transfer
> >speed
> >becomes normal again.
> >
> >Any ideas why this would happen?
> >
> >
> >------------------------------------------------------------------------
> >
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> >OmniOS-discuss at lists.omniti.com
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>
> As a random guess from experience with other network stuff - does the
> speed-drop happen on a running connection or new ones too? Do you have
> concurrent transfers at this time?
>
> Some other subsystems (no idea if this one too) use best speeds for new or
> recently awakened dormant connections, so short-lived bursts are fast - at
> expence of long-running active bulk transfers (deemed to be bulk because
> they run for a long time).
>
> HTH, Jim
> --
> Typos courtesy of K-9 Mail on my Samsung Android
>
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