On 02/26/2010 03:59 PM, Ed Greshko wrote: > Daniel B. Thurman wrote: > >> On 02/25/2010 09:34 PM, Ed Greshko wrote: >> >> >>> Tony Nelson wrote: >>> >>> >>> >>>> On 10-02-25 21:37:58, Ed Greshko wrote: >>>> ... >>>> >>>> >>>> >>>> >>>>> I can't conceive of a situation where usage of http or ftp protocol >>>>> would interact to "smack" an imap connection. >>>>> >>>>> To me, based on your observations, I'm getting the feeling you may >>>>> have a strange network problem that may be local to you or within >>>>> your ISP close to you. As I said, I'd be dragging out wireshark. >>>>> >>>>> >>>>> >>>>> >>>> It's not FastestMirror, it's the mirror it's choosing to use. If he >>>> figures out which one, he can blacklist it. >>>> >>>> >>>> >>>> >>>> >>> That is what the case was in my situation although maybe I didn't spell >>> it out. However, I did say that Singapore was causing an issue for me >>> and I added the line "exclude=.gov, .sg" to my fastestmirror.conf. >>> >>> But, when he says that his IMAP connection is *also* being affected then >>> I can't conjure a situation where yum would have an impact on IMAP >>> >>> >> I can try to find out if it is a mirror problem, but then again, I thought >> that mirrors were randomly chosen and if a mirror is not responding >> properly or whatever it is, the offending mirror should have been dropped >> and another mirror tried. From past Yum versions, I have seen this to >> be the case, and I have not seen any such thing with F12's Yum version >> which lead me to question if mirror testing/switching code was >> dropped? I hope I am wrong in my assumptions. >> > AFAIK, haven't done any research, without FM mirrors are chosen more or > less at random. With FM a list is generated and the fastest mirror > found. Then every time yum is run the list is used. > >> Is it possible that the network is somehow using maximum bandwidth >> preventing network access to other apps? The IMAP network break >> seemed to prevent IMAP client connectivity temporarily and once yum >> stopped, IMAP client connections quickly resumed. >> >> I have a pretty quiet network and it seems to me, that somehow running >> yum with FM causes problems. Removing FM seems to work but it is >> not maxing out the bandwidth. For example, with FM, it is hitting hard >> at around 300-320KB/s but without it, it is hitting around 200-290KB/s >> which is notably slower as you watch the downloads. >> > First, the only thing that FM does is determine what mirror it feels > will get your the best download speed. That is all that is does. > Period, end of story. If you use FM and you get higher speed downloads > on updates then it is doing its job. > > If high download speeds are really causing problems, not just hogging > your connection and slowing down other types of downloads, then a > network problem could exist. > > What kind of connection do you have? I've got DSL with advertised > speeds of 2MB/515Kb. I run "slingplayer" on my Vista system and viewing > is crisp and clear and no noticeable impact on browsing. That is, until > I start downloading a torrent or two while simultaneously doing > updates. Then the browsing is slower, the TV isn't as clear. But that > is to be expected. But, nothing dies. > I have 3-5MB/1Mb. Interestingly, as I said before, using the same system, I do not have a problem at all using F9 and F11! Must have installed *something* that might be getting in the way? Beats me! Nothing dies on F12, but Yum hangs using FM. That is the only thing I am seeing. Ahh, well... I can live without FM. > If you are getting a situation where a high speed download results in > everything degrading into being unusable then a hardware problem in your > path could exist. This was years ago, but I once had a problem where a > router suffered from buffer overruns when traffic was extremely high. > It would throttle connections and start throwing away data resulting in > many retransmissions. To make a long story short, it couldn't > gracefully recover and caused high packet loss in spikes. Made finding > the problem hard. > Ugh. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
