Disqus - Latest Comments for jebu

Re: http://nosql.mypopescu.com/post/912512750

jebu — Fri, 06 Aug 2010 11:08:28 -0000

Hi Alex,
Hope you had a chance to go through my follow up post on how I model the data in Riak for the problem I'm trying to solve. http://blog.inagist.com/lin....

My issues with Cassandra and with Bitcask under Riak were with how they behaved in terms of their memory consumption. In the presence of ever increasing number of keys like the tweets which keep coming in both of them would eat up all the memory available on my servers. Cassandra I guess because of its per SSTable cache of keys and Bitcask because it maintains all keys in memory. This initially being the reason for me looking out for a different store than Cassandra. I should mention that in addition to tweets other data is also managed in Cassandra / Riak.

What I was trying to convey is how something that was easily modeled in Cassandra could still be mapped into Riak and possibly be to an advantage given the map-reduce
infrastructure.

My preference of innostore over bitcask has purely been seeing how they behave in real use. Bitcask is definitely faster but high in memory usage on the servers. Innostore on the other hand is steady on the memory usage over time.

Re: Erlang tap to the Twitter stream

jebu — Mon, 12 Jul 2010 21:38:34 -0000

Not if the server behaves properly and sends each chunk as a proper JSON. This is what the twitter streaming API does. So this is not an issue with the twitter stream, but yes it could be if each chunk response from the server is not a valid json chunk.

Re: Google cell tower mapping with Python on S60

jebu — Wed, 16 Sep 2009 05:18:14 -0000

most probably the google webservice is not able to lookup the location for your cell tower

Re: Google cell tower mapping with Python on S60

jebu — Wed, 16 Sep 2009 03:42:59 -0000

yes you will need to sign you app (.sis) with elevated privileged by going thru the symbian signed process.

http://blog.jebu.net/2008/0...

我不知道中國 (via google translate)

Re: HowTo: Implementor's guide to rssCloud

jebu — Tue, 08 Sep 2009 01:09:38 -0000

Dave,
Since you are targeting micro-blogging primarily, could you not reduce the traffic on the last lap of the delivery of the update? In addition to notifying the aggregator of the url which has changed why not bundle the new entry that was detected also in the notification? The cloud is anyway doing a verification with the source to figure out if the feed has changed, why add one more trip from the aggregators to the source?

Re: In the clouds with Rackspace

jebu — Fri, 28 Aug 2009 09:01:56 -0000

I went with mosso based on your review for http://nowwhat.in It was a wonderful experience, up and runnning in a few mins. Loving it so far, thanks for the tip.

Re: Superfeedr Blog : A new Architecture

jebu — Thu, 27 Aug 2009 01:02:30 -0000

Interesting, been a big believer in XMPP. Strophe bridges the gap between the browser and XMPP in a seamless manner. This looks like the piece that was missing for "real" real time web to take off. Looking forward to playing with Strophe. Like the good stuff you guys are pioneering.

Re: Fireeagle location updater

jebu — Wed, 10 Jun 2009 13:42:13 -0000

here you go, have updated the post with the necessary scripts, see how it goes

Re: Google cell tower mapping with Python on S60

jebu — Fri, 20 Mar 2009 00:43:09 -0000

MCC and MNC are identifiers of your cell tower, so ideally you should be providing it to google not the other way. there is an example of using the api with all the 4 parameters of the cell tower here .

Re: Google cell tower mapping with Python on S60

jebu — Tue, 10 Mar 2009 23:39:13 -0000

I'm no python expert, but this code looks good and running the skeleton of your request works fine. Whats the sort of errors that you see? Might be better to continue this discussion on email, feel free to mail me [jebui at yahoo dot com]

Re: Google cell tower mapping with Python on S60

jebu — Tue, 10 Mar 2009 10:52:37 -0000

Why not that should be pretty easy to setup, read from sys.stdin for the input and use either the httplib used in the scrupt or urllib to call out to the url that you want to.

Re: Google cell tower mapping with Python on S60

jebu — Thu, 05 Mar 2009 23:10:16 -0000

@jojo that is strange i happen to have the exact same setup as you and it works fine for me. what does this simple script give you

import location
print location.gsm_location()

this should print the gsm cell id details you are connected. If this does not give you that then try these.

* Have you signed the python shell with the proper privileges? go thru https://www.symbiansigned.c... and have the shell signed with all the privileges. location is a privileged call and the app needs to have the privileges.

* Try installing the python packages on the primary storage instead of the memory card.

Re: Google cell tower mapping with Python on S60

jebu — Tue, 03 Mar 2009 11:49:54 -0000

@nick looks like location.gsm_location() is not returning the cell id as expected. have you tried sample scripts which do this call?

Re: Google cell tower mapping with Python on S60

jebu — Tue, 24 Feb 2009 08:13:20 -0000

@johann thanks for the report, i will try to get a revised version out which does proper error reporting so it makes it a little bit clear where the issue is.

Re: Google cell tower mapping with Python on S60

jebu — Mon, 23 Feb 2009 11:15:07 -0000

@sumanthmara, cant help you much this is a snippet for python on S60. I have not tried packaging it into a SIS. you could ofcourse use it from c++, its a plain http call, you have to marshal and unmarshal the arguments as per the format expected by the service, which is all that the code above does.

Re: Google cell tower mapping with Python on S60

jebu — Mon, 23 Feb 2009 11:07:53 -0000

@johann I verified the script with the negative lat long and this works fine since the unpack is properly interpreting it as a signed integer. The CellID and LAC that you have mentioned give back a not found response from google. Check the script against CID=4995 LAC=6045 MNC=380 MCC=310 and it properly returns Lat = 37.871034 Lon = -122.273795. Its possible that because the script you pointed is using MCC and MNC its able to locate it, the script that I have able only uses the CID and LAC.

Re: Erlang talking to apache via AJP mod_jk

jebu — Fri, 20 Feb 2009 06:09:23 -0000

@sahaab i'm sure you will need it

Re: Google cell tower mapping with Python on S60

jebu — Mon, 08 Sep 2008 07:00:48 -0000

@snipe, if the script threw an unpack error that usually means that the google tower lookup service does not have the lat long for the specific tower that you are querying for. Good check would be to try running google maps on your mobile and see if it shows you the location without turning on GPS.

Yeah that script is bare bones i have not done error checks for handling these cases.

Re: Google cell tower mapping with Python on S60

jebu — Mon, 08 Sep 2008 03:18:56 -0000

@snipe no idea of how this gel's with UMTS. This script essentially maps the cell tower to which your phone is currently connected to a physical location. On GSM networks this is identified by 4 numbers mcc (countyr) , mnc (network) , lac (location) and cid (cell id). If this information is available in a UMTS network this should work.

Re: Google cell tower mapping with Python on S60

jebu — Thu, 14 Aug 2008 00:03:39 -0000

Hi Dario,

I have no clue why mcc and mnc are not used but i'm not a GSM expert. If they can get a fix with lac and cid, that might be good enough. Most other cell tower mapping services do use all four of the parameters, Google is the only one that i have seen using just two of them.

Re: Google cell tower mapping with Python on S60

jebu — Wed, 13 Aug 2008 11:34:21 -0000

Hi Dario,
It should work by default on other phones too as long as you have python and the location API on python available. I have tested on PyS60 1.4.3 and above. Do you have a specific error that you are getting? One thing that i have seen is that the google web service is blocked from some IP ranges so that might be one cause. But if you have the error trace from python that would definitely help to track it.

--
Jebu