Op woensdag 1 januari 2014 17:39:09 schreef christopher.l...@thurweb.ch: > Hi all > > Firstly, a very very happy new year to all members of this list. I > have a glass of wine next to me as I write this, and I raise it to all > of you. > > I have just successfully updated to 10.0.2.5, and been able to install > my first app from the Harbour (Artem's Wikipedia)!!! > > The clue was at the bottom of my mail last night. > > Zitat von christopher.l...@thurweb.ch: > > [root@localhost nemo]# pkcon refresh > > Refreshing cache [=========================] > > Waiting in queue [=========================] > > Waiting for authentication [=========================] > > Waiting in queue [=========================] > > Starting [=========================] > > Refreshing software list [=========================] > > Fatal error: Timeout exceeded when accessing > > 'https://download.jollamobile.com/pj:/hw:/android:/common:/release/latest_ > > armv7hl/repodata/repomd.xml?credentials=store'. > So what was the cause of the problem and the solution? > > I have divided this mail into 2 parts: the bit for Jolla, and the bit > for the rest of us who may have a similar problem. Both may need to do > something. > > The bit for Jolla > ---------------------- > It turns out that my home network had very varied response times (i.e. > often high latency). Having spent much of the afternoon measuring and > remeasuring, I can say that I was getting everything between 13ms to > over 3000ms between my Mac Pro Tower and my provider's speed tester. > > Note: latency should not be confused with throughput: Despite the poor > latency I get good throughput (e.g. I can download the Lubuntu install > in a few minutes). > > So what did I do? > > Basically I rejigged and reduced my network until I got a reliable and > repeatable latency of around 16 ms via WLAN. (see details how in the > next part below) > > After that system update and the store work like a dream. > > So what is the moral of this tale? > > Jolla Installing (be it developer mode, system upgrade, Harbour) > cannot cope with real-world latency. Yes my network (was) to fault, > but other things manage to work (Nokia Store, Google Store, BB Store, > Linn DS and Samsung TV updates etc). Maybe there is a simple timeout > setting somewhere that needs to be a little more flexible? > > The bit for the rest of us > --------------------------- > > How did I achieve the improvement in latency / response times? > > My network (as are probably many of yours) is complicated and a little > bit higgledy-piggledy. > > Upstairs (the starting point) I have: > > 1) The cable modem > 2) The ethernet router > 3) An ethernet switch > 4) The Mac Pro Tower (called Butschgi) > 5) 2 NASes > 6) A Develo Powerlan (feeding ethernet over the power network) > 7) A Dlink WLAN router - normally turned off because I sleep upstairs > 8) A printer > > Downstairs I have > 9) An ethernet switch > 10) A digital stream (DS) > 11) A TV > 12) A blueray player > 13) A Develo powerlan to WLAN router: this is the WLAN I normally use. > > Various clients (laptops, kindles, smart phones) connect mainly via > the Develo WLAN > > Upstairs and downstairs are connected via an ethernet cable (and via > powerline) > > So first I started measuring latency using my IP's speed tester. I > measured from Butschgi which is directly on the Ethernet router, which > is directly on the cable modem. > > Despite this, I was getting the incredibly varied latency, varying > from 13 to over 3000 ms (and mostly 500ms and over). > > Then I stripped down my network to the bare minimum: Butschgi, The > cable router, an ethernet router, and hey presto I was getting regular > responses of 13ms. > > Then I added the Dlink WLAN Router, and Apple-pip (my MBA) as client > via WLAN, and measured again, and got consistent responses of around > 16ms. > > After that I connected my Jolla to the Dlink WLAN, and hey-presto > installing / updating works as expected! > > So what is the moral? > > Something (or things) in my network was interfering enough to cause > horrible latency: even to things like Butschgi which are connected as > directly as possible to network point of entry. > > So If you are having problems updating your Jolla, it is worth > checking out the latency between you and your IP, and if necessary > reducing and simplifying your network. > > Now I need to gradually add stuff back to work out what the culprits are ...
probably something layer 2 (or alot of connections(torrent?)) is hogging your butschgi or modem. could be the power network, or the multicast streaming if the switches or butschgi or modem doesn't have igmp snooping... _______________________________________________ SailfishOS.org Devel mailing list
