Re: Poor Samba throughput on 6.0

From: Michael Vince (mv_at_roq.com)
Date: 11/09/05

  • Next message: Jeremie Le Hen: "Re: Poor Samba throughput on 6.0" 
    Date: Wed, 09 Nov 2005 13:48:33 +1100
To: Joao Barros <joao.barros@gmail.com>

    Joao Barros wrote:

    >Hi,
    >
    >Last month I started a thread[1] on current@ about this, but I guess I
    >should have done it here, my apologies for that.
    >
    >After my initial post I did some more testing and I'm going to start
    >clean here with all my findings :)
    >
    >I started with Samba 3 installed on a PIII 733MHz with fxp (82559) and
    >a RAID5 consisting of 4 drives connected to an amr.
    >Performance reading or writing was poor, around 5.5MB/s measured on
    >two Windows clients and iostat never topped that by much.
    >cpu was mbufs were available and there were no IRQs shared.
    >To dismiss the amr out of the question I tried with a local IDE
    >attached yielding the same results.
    >I then tested the same on a machine I have at work, an HP Proliant
    >server, Pentium 4 3.06GHz, used SMP instead of GENERIC to use HTT.
    >I could get 8MB/s with 2 read or write simultaneous operations. With 1
    >operation I still can only get 6MB/s
    >This machine has 1GB ram and after copying a 700MB file to it it was all cached.
    >A copy to dev/null took 1 second.
    >A copy via samba took the same time as if there was no cache for it.
    >iostat always showed 0.0 during the operation so that pretty much
    >takes disks, controllers, IO out of the picture.
    >
    >Both machines have cpu, IO and mbufs to spare and they still can't use
    >them. Why?
    >
    >
    >[1] http://lists.freebsd.org/pipermail/freebsd-current/2005-October/057116.html
    >
    >--
    >Joao Barros
    >_______________________________________________
    >
    >
    Sometime in the near future I will be building a Samba3 server and I
    plan to get everything I can get out of it, I expect to uncover a lot of
    needed tweaks to get it going fast.
    My guess would be to you try at least turning on polling, also if its
    only 100mbit Ethernet/switches you got then I guess you cant expect much
    either.

    Mike

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  • Next message: Jeremie Le Hen: "Re: Poor Samba throughput on 6.0"

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    • Poor Samba throughput on 6.0
      ... two Windows clients and iostat never topped that by much. ... To dismiss the amr out of the question I tried with a local IDE ... Both machines have cpu, IO and mbufs to spare and they still can't use ...
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    • Re: Poor Samba throughput on 6.0
      ... >>cpu was mbufs were available and there were no IRQs shared. ... >>Joao Barros ... 100mbit switch I can max out the interfaces using Windows or Linux. ... On my particular enviroment (a 3com switch at home) I can max out the ...
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