Stefan, the output is the following:
$ time host 0.0.0.0 Host 0.0.0.0.in-addr.arpa. not found: 3(NXDOMAIN) real 0m0.040s user 0m0.000s sys 0m0.010s charnik@nireas:~$ time host 127.0.0.1 1.0.0.127.in-addr.arpa domain name pointer localhost. real 0m0.022s user 0m0.000s sys 0m0.010s On Mon, Dec 12, 2011 at 9:32 AM, Fabian Groffen <fabian.grof...@cwi.nl> wrote: > On 12-12-2011 00:10:33 +0200, Charalampos Nikolaou wrote: >> Hi, >> >> just used getnameinfo() instead of gethostbyaddr() in >> openConnectionTCP() and it doesn't gain any time improvement. In >> addition, inspecting openConnectionUDP(), I saw that it uses >> getnameinfo() instead of gethostbyaddr() and it is slow as well. What >> I found, though, is that the trouble is caused by INADDR_ANY (i.e., >> 0.0.0.0). If 127.0.0.1 or a specific, external ip is given, then both >> getnameinfo() and gethostbyaddr() return instantaneously. After all, >> is there any point of resolving 0.0.0.0? Anyway, regardless the ip >> given, I think that resolving should be done in a timely manner, don't >> you think. Time permitting, I shall further inspect the problem to >> find out whether it is an issue in glibc or specific to system >> configuration (of Ubuntu). > > Perhaps it's a firewall configuration that doesn't like the broadcast > interface, and/or broadcasting packets at all. @Fabian: I have checked it with and without firewall enabled and it takes the same amount of time. Regards, Babis > > ------------------------------------------------------------------------------ > Learn Windows Azure Live! Tuesday, Dec 13, 2011 > Microsoft is holding a special Learn Windows Azure training event for > developers. It will provide a great way to learn Windows Azure and what it > provides. You can attend the event by watching it streamed LIVE online. > Learn more at http://p.sf.net/sfu/ms-windowsazure > _______________________________________________ > Monetdb-developers mailing list > Monetdb-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/monetdb-developers > ------------------------------------------------------------------------------ Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure _______________________________________________ Monetdb-developers mailing list Monetdb-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/monetdb-developers
