Re: [Ubuntu-SG] DNS on Ubuntu question
"Jeffrey 'jf' Lim" <[email protected]>
| Newsgroups | gmane.user-groups.linux.singapore |
|---|---|
| Message-ID | <[email protected]> |
On Mon, Sep 6, 2010 at 11:33 PM, <[email protected]> wrote: > On Mon, Sep 6, 2010 at 8:00 PM, Jeffrey 'jf' Lim <[email protected]> > wrote: >> >> On Mon, Sep 6, 2010 at 4:51 PM, <[email protected]> wrote: >> > Anyway, I've also considered switching to other DNS servers, eg. >> > opendns, >> > google public dns, pacific internet or singnet dns, etc. Conclusion was >> > that switching would make overall browsing slower, as content >> > distribution >> > networks based on anycast dns would serve content via non-optimum >> > network >> > paths (eg, via servers in hong kong or the US instead of servers within >> > starhub's velocity program in singapore). >> >> how many of those would you typically come across, I wonder? Another >> option (heheh) would be to in this case keep the local dnses, but >> implement a caching resolver locally for the speed. > > Do you use amazon? facebook? smugmug? slashdot? :) for the most part, hardly, actually. > Let's take slashdot as an example. There are 6 unique hostnames contacted > for the attached request. 5 (a.fsdn.com, ad.doubleclick.net, > b.scorecardresearch.com, pagead2.googlesyndication.com, > www.google-analytics.com) of them use anycast-based CDNs. Only slashdot.org > itself is not using a CDN. I'm not so sure akamai uses anycast (a.fdsn.com, ad.doubleclick.net, ... and I didnt bother to check the rest). They resolve to your nearest ip address (rather than anycast) - but these are all different ip addresses. > The 5 based on CDNs are < 25ms away from me. I made 17 requests to them. If > I used opendns, they would be >200ms away. 469.3 KB of the traffic is > served by CDNs. 113.3 KB of the traffic is not. > The good news is that google public dns now has servers somewhere in > singapore as well (i think they were only in the us during initial launch). > So, I could use them and should probably still enjoy good speeds, although > there may be some cases where the results might still not be optimal. > > -jf -- "Every nonfree program has a lord, a master -- and if you use the program, he is your master." --Richard Stallman "It's so hard to write a graphics driver that open-sourcing it would not help." -- Andrew Fear, Software Product Manager, NVIDIA Corporation http://kerneltrap.org/node/7228 _______________________________________________ LUGS Mailing list - [email protected] List FAQ: http://wiki.lugs.org.sg/LugsMailingListFaq Info page: http://www.lugs.org.sg/mailman/listinfo/slugnet To unsubscribe send an empty email to: [email protected]