[SGVLUG] Samba performance issue

[Michael Proctor-Smith]

I did not know about thermal recals of hard drives but I would suspect
flushing of kernel buffers. becuase you are playing for a raid array
would all the drives do there thermal recal at the same time? I the
past I remeber someone who was talking about having to disable buffer
caching of there raid array when dealing with streaming high bit rate
video because of delayed writes causing glitches. Strangly disabling
buffers can increase throughput.

On 5/21/08, Matt Campbell <dvdmatt at gmail.com> wrote:
>
> Good afternoon,
>
> My media server project is coming along well, I have purchased an Apple TV
> and am hacking it with Linux to act as the client (fall meeting topic?).
>
> I have been running into some performance problems using Windows as the
> client.  The Samba server on the Linux platform can spool media all day, but
> every 20 minutes or so there is a .5 second hiccup.  Do any of you have
> experience tuning a Linux server to remove these problems?
>
> They really hit me this weekend, to the tune of $1200 when I tried to use my
> media server as an ad-hoc RAID array for my editing system.  I had 6 hours
> of video (12 anime episodes) that I had to output for a client.  Every 20
> minutes there was a video hit, it took me 90+ hours without sleep to get
> everything back out to tape and I ended up getting hit with two additional
> days of equipment rentals.
>
> What types of things can I look at?  Previously it was suggested that the
> performance problem was in the VNC client under Windows, but I have not been
> able to find or fix anything there.  I assume the problem also occurs in the
> VNC client under Linux running off another system serving the data over
> Samba, but I have not tested that yet.
>
> Thanks in advance for any help or suggestions,
>
> Matt
>
>