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Date:      Fri, 18 Jan 2008 09:28:28 +0000
From:      "Ulrich Spoerlein" <uspoerlein@gmail.com>
To:        "=?ISO-8859-1?Q?Johan_Str=F6m?=" <johan@stromnet.se>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: Backup solution suggestions [ggated]
Message-ID:  <7ad7ddd90801180128m114b0491p7d8f44ae7b1b4cb7@mail.gmail.com>
In-Reply-To: <73ED6B7D-49C5-4C69-8BE2-27F0BDAA246E@stromnet.se>
References:  <E6BCC509-6CC8-44F1-98C2-416920A52218@stromnet.se> <39FB5CF3-F2F4-401B-9D6D-7796608152E5@ish.com.au> <4FF9842D-ADC9-4A99-9DC4-E0FE1CC9CDCF@stromnet.se> <20080116222729.GB1529@roadrunner.spoerlein.net> <134BD86C-19CF-42A7-9190-FAD3BB564A06@stromnet.se> <7ad7ddd90801170030l790810b5r5bb156e3cda286b1@mail.gmail.com> <73ED6B7D-49C5-4C69-8BE2-27F0BDAA246E@stromnet.se>

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On Jan 18, 2008 9:11 AM, Johan Str=F6m <johan@stromnet.se> wrote:
> Your no,barely, bad hell no seems to fit pretty good.. I did some
> testing during the night with the above (non-production) setup.
> What I did was doing some rsyncing over the night:
>
> while true ; do
>          echo "`date` Clearing vmail" >> logfile
>          rm -rf vmail
>          echo "`date` Starting rsync" >> logfile
>          rsync -vr /usr/var/vmail . |tee -a logfile
>          echo "`date` Rsync finished " >> logfile
> done
>
> I started this at ~02.0. The results? A freshly rebooted 6.2 (6.2-
> RELEASE-p6 FreeBSD 6.2-RELEASE-p6 #0: Fri Jul 27 15:47:50 UTC 2007)
> box in the morning..
> [...]
> What I dont have is a coredump, judging from dmesg -a savecore wasnt
> even run.. running it now, 5 hours later, didnt find any cores.
>
> The other end (7.0 server) wasnt affected at all.
>
> Not realy sure what it had been doing, because looking at my
> bandwidth graphs from the switch, nothing was done at all.. It didnt
> even go through one iteration of rsync... ~7.5k files/directorys
> seems to have been transfered, then the log doesnt say more. But
> according to the BW graph, after ~03.00 no traffic was sent at all...
>
> Some known bug with 6.2?

There was some ggatec problems with TCP and/or sockets, I think they
have been mostly resolved post-6.2. If you want to pursue this further
(it *would* be a cool setup, no doubt) I'd suggest three things:
- Update to 6.3
- Leave GELI out of the loop for now (only do ggate, with random data perha=
ps)
- Build a kernel *without* options PREEMPTION

hth,
Uli



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