Queries are "lost" ??
phn at icke-reklam.ipsec.nu
phn at icke-reklam.ipsec.nu
Fri Dec 10 17:21:22 UTC 2004
Serge Tchesmeli <zztchesmeli at echo.fr> wrote:
> Hello to everybody.
> First of all, excuse my english, i'm a french user.
> My problem:
> Our compagny use amanda to make backup of approximalty 400 servers.
> When amanda job start, it make two DNS query: a "hostname" and a "reverse".
> Since now 2 month, everyday we have some hosts that have not been backuped by
> amanda because the DNS query had failed. Hosts are never the sames, and the
> query failed on direct or reverse query.
> I have mirrored the switch port where my dns server is pluggued, and i have
> captured all packets and what i see is:
> - amanda query is captured
> - DNS server don't answer to this query
> I have put "severity debug 9" on all named channel logging and i do not see
> any kind of error in logs.
> So my question:
> - Can bind "miss" or "refuse" some query because of "overload?" and if yes,
> can we log that?
> system info:
> - bind 9.2.4 RC2, chrooted
> - Linux 2.4.20-13.7custom #3 SMP (BI PIII 500Mhz, 1Go RAM)
> - Red Hat Linux release 7.2 (Enigma)
> Bind stats:
> --- Statistics Dump --- (1102608300)
> +++ Statistics Dump +++ (1102608600)
> success 16645093
> referral 1
> nxrrset 583904
> nxdomain 3921475
> recursion 138245
> failure 23020
> --- Statistics Dump --- (1102608600)
> +++ Statistics Dump +++ (1102608900)
> success 16674759
> referral 1
> nxrrset 585073
> nxdomain 3929061
> recursion 138492
> failure 23034
> --- Statistics Dump --- (1102608900)
> Ask me if you need more info.
> thanks
> Serge
Is the nameserver heavily loaded ?
Does it have free memory ?
Does the amanda server have multiple nameservers in /etc/resolv.conf ?
is your dns-environment correct ? I see 20% of all queries gives nxdomain ...
--
Peter Håkanson
IPSec Sverige ( At Gothenburg Riverside )
Sorry about my e-mail address, but i'm trying to keep spam out,
remove "icke-reklam" if you feel for mailing me. Thanx.
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