Tag Archives: apps

My full on review on Hootsuite Pro service with these third party apps for social media marketing and management

My full on review on Hootsuite Pro service with these third party apps for social media marketing and management
Here is my review of HootSuite’s Pro paid service. It is still way too early to see the impact of the paid social networks like Google Plus
Wordpress, or StockTwits. There is no point for the extra services if they don’t work. I must say there are wierd connection problems with Google
Plus pages with some title only on my posts. That is frustrating but I am getting even stranger problems trying to post StockTwits postings. It only
appears to work with Evernote. Don’t ask me why?

Overall, I am questioning this paid service as none of this stuff works. Not worth it and a complete mess. If this is how the so-called start
up community is pulling off this kind of rubbish, no wonder they are failing with the lack of venture capital. Shame  on them. Thanks for wasting my
time you tossers.

Most of these are pure crap. It seems they are developed by a third party so I am sure HootSuite will not take responsibility if these
will work within their dashboard. Either way, it is an insult to a potential paying customer to even see this. It makes both parties look
like they don’t care about their users. It is just junk!!!  I used the latest version Internet Explorer so don’t blame it on the browser. I
got unpredictable results for each using Firefox and Opera.
So far, just stick with the paid offering as that works just fine.

HootSuite Apps
Tumblr    does not work with any setting for Tumblr account settings
Vimeo    Manually post
Myspace    CANNOT connect with Hootsuite to Myspace note connected with Twitter
Mixi    Japanese but translation to English
Evernote     Evernote will share all notes to social including Stocktwits
Flickr    account name is quantlabs
Stocktwits user=bryandowning    cannot tweet using Stocktwits but can share docs from Evernote
TrendSpottr    good for real time trends on twitter
Wordpress     works on self hosted apps but must use wordpress admin login credential but cannot publish
SocialBro    you need to pay
SlideShare    does not connect to SlideShare
Ymmer     too slow sending out registration email
NeedTagger    delete not applicable to quant niche
Xing    you can post an activity manually but no real benefit
Zuum    useless as it does not report any results plus chargeable
Reachli    cannot create account also looks chargeable

Stumbleupon    cannot auto post with it
Instagram     cannot auto post with it
Reddit     cannot auto post with it
Orkut     cannot auto post any content
Viadeo    just reblogs whats in your account so cannot post
Hubspot     chargeable
SocialFlow     cannot create account from Hootsuite
Identi.ca    not accepting new users
Sina weibo    just circles around with connection offer
Chime.in    cannot sign in or create account
Renren    just circles around with connection offer
Socialcast    no connection offered

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How to build Beowulf cluster aks HPC for Open MPI C++ apps like HFT with R with RCPP RInside package on Debian Linux #rstats #linux

How to build Beowulf cluster aks HPC for Open MPI C++ apps like HFT with R with RCPP RInside  package on Debian Linux #rstats #linux

Install Debian Etch from: and follow first CD install instructions:

http://www.debian.org/CD/http-ftp/

Install Debian Virtual Machines in Virtual Box as usual

http://www.wired.com/geekdad/2012/02/debian-linux-on-oracle-virtualbox/

Go with all default options.  You can always clone  a second  client VM to create a slave.

Set up hostname and configure network via: (choose the static address  not DHCP)

http://www.debian-administration.org/articles/254

Note that you could loose network connectivity soo add an additional Network Adapter with Bridged Adapter for each VM. within the Virtual Box setting. so see next step

Ensure each VM has network adapter setting to Virtual Box Host Only

http://christophermaier.name/blog/2010/09/01/host-only-networking-with-virtualbox

Create NFS for both virtual machines as server and client:

http://www.howtoforge.com/nfs-server-and-client-debian-etch

Note: When  editing exports on the server with:

/home           192.168.0.101(rw,sync,no_root_squash)

/var/nfs        192.168.0.101(rw,sync)

 

Note that 101 is the client!. ALso, I have when I try to auto mount during boot on the client, it would hang. I just created a shell script to do the mounts manually when you boot.  I just called this /etc/mountmaster.sh

 

If you need to add users do:

http://www.debian-administration.org/articles/2

You should be able to proceed with the following set up of your Beowulf cluster:

http://www.debian-administration.org/articles/2

To understand nad configure ssh connections with no passowrd, use:

SSH your Debian servers without password

This could be useful http://wiki.debian.org/SSH but note it uses RSA not DSA

If confused, use this next one but remember the ssh server is the Open MPI slave while client is the Open MPI since it logins into the Open MPI slave.

http://www.howtoforge.com/set-up-ssh-with-public-key-authentication-debian-etch

 

 

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How to develop Microsoft .NET C# apps for Linux, Google Android, Apple iOS iPad iPhone and Mac OS X with Mono Develop #apple #android

How to develop Microsoft .NET C# apps for Linux, Google Android, Apple iOS iPad iPhone and Mac OS X with Mono Develop #apple #android

So I went to another Toronto .NET User group. Fellow Meetup member  Shane C did a nice presentation on how to develop .NET applications on a Mac. Yes a Mac. With the movement of Mono for Linux or Unix, the newly spun off division  Xamarin from Novell. The possibility to develop a .NET backend application with a unique front end for your target device like Apple iOS or Google Android. It is kind of cool. All this is done through their two products MonDevelop IDE and Monotouch DLL. You can just target you backend. Let’s say you want to develop in something for Mac or iOS for iPad or iPhone, you can visually use the components for your add. All these can be drag and dropped into your panel with XCode generating the Objective C. It works in conjunction with Mono Develop which can generate your .NET code into Objective C on the fly. Pretty cool. Also this code can also be submitted to the Itunes store which Apple needs to approve. Again, very cool and a unique way of rapid development for your backend service. I think this is the best workflow yet I have seen to develop a mobile or Mac app. The only caveat for developing on Mac is you need a Mac, Apple developers license, ($99) and the Mono Touch DLL which is $299. It is a nice option but you need to be serious if you want to go down this path.

Also, you can target the same app using the same concept for Android and Linux/Unix as well. These are free options other developing for Apple technologies. As said, it is a good option if you want rapid development for mobile.

See what I plan to do with this for mobile apps 

Presentation details are at:

http://www.metrotorontoug.com/events/88284472/

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how to export Java class into JAR then convert EXE using IKVM for Dot Net C# Apps

how to export Java class into JAR then convert EXE using IKVM for Dot Net C# Apps

Learn more what I do with this here.

www.sourceforge.net/projects/ikvm/files/ikvm/

www.ikvm.net/index.html

 

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Does the syntax and functions of R the same as Matlab as popular Apple Ipad scientific calc apps?

Basic stuff I know, but does the syntax and functions of R the same as Matlab as popular Apple Ipad scientific calc apps?
For instance, if I need to intgrate with Matlab, I use the int() function but R is integrate(). If it comes out of a symbolic calc Ipad app, it would be the same as Matlab. I have confirmed various Matlab function are pretty close to being 100% compatible with a scientific calc app but not in R. What gives? Am I right in this  assumption.

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My review of Apple Ipad apps of Pi Cubed CAS Calc P11 and Weave into Matlab or R with Sweave

My review of Apple Ipad apps of Pi Cubed CAS Calc P11 and Weave into Matlab or R with Sweave

Learn more what I learn by going here

 

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Building Metro Apps for Windows 8 with XAML + C# in quant development

Building Metro Apps for Windows 8 with XAML + C# in quant development

Building Metro Apps for Windows 8 with XAML + C#

Tuesday, April 10, 2012, 6:00 PM333 Bay Street, Suite 4600, Toronto, ON

Colin Melia takes us through the ins and outs of building Metro Apps for Windows 8. More details coming soon.

http://www.metrotorontoug.com/events/56110002/?a=mr1p_grp&rv=mr1p

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Quant development: HA and Low Latency on EC2 for RESTful Apps

HA and Low Latency on EC2 for RESTful Apps

I just added a post to my blog condensing some of my experiences and thoughts about implementing HA, Low Latency on EC2: specifically for RESTful apps. I’d welcome any comments or suggestions anyone may have…
RESTful High Availability and Low Latency on AmazEC2 is not designed for low-latency if you have a non-trivial or distributed dataset. The only part of the topology with semi-consistent low-latency characteristics are the HPC nodes, which unfortunately are designed for applications where disk does not matter and offer little in the way of HA. Our engineers use the EC2 HPC nodes as a test platform for low-latency codes and that works well enough but it would not be efficient for production.

How low is “low-latency”? Throughput does not seem to be a concern, so it probably could be done for sufficiently high values of “low latency”.

—-
Andrew, that was my point. 🙂

If you want low latency, you’re talking fusionIO cards, 10GBe, and as little network between your rest server and your cluster. Then your client has to be as close as possible to your REST server.

Sort of violates the principle of Hadoop…;-)

I would agree that “low-latency” and “Hadoop” are rarely used together in the same sentence and for good reason. 🙂

That said, the REST interface implies a moderate tolerance for latency so it might be possible to put something together that works. Our systems that run on EC2 are neither Hadoop nor REST; they are almost entirely custom but the workload necessitates it and there is no open source software that can scale the kinds of analytics we do.
–,

Low latency means different things to different people. In the world of trading, low latency means as fast as technically possible, damn the costs.

In the Hadoop world, low latency means as fast as possible using ‘commodity’ hardware. And even here commodity hardware is sometimes tough to define.

The real question is how fast is fast enough?

You can design low latency Hadoop systems. But if you look at the problem you are trying to solve, your budget for hardware, software, and man power … etc… Ask yourself how low do you need to go? Does it make more sense in paying a premium for faster hardware or expanding your cluster out?

EC2 is a different beast. It’s a public infrastructure and it’s not really designed for speed.
—-
Great article. Most of the advice including CDN, Geo-load balancing applies in all circumstances not only cloud computing. I am the #1 proponent of “Ground Computing”. Reading the article I get the “square peg in round hole” feeling. Technologies like Amazon SQS, Amazon Cloudfront, Amazon RDS, Amazon ELB, buzzword bingo anyone? All this just to get ALMOST as fast as real hardware doing it the “old fashioned way”.

If the primary fact is the Amazon network has latency and noisy neighbours, no amount of technology layered above that will help. You can not get around low latency with more layers.
5 days ago

Are we talking 5 sec. or 50 ms ? (Assume 40 ms ping time from client to server.)


If someone out there (admittedly, living in a box but interested in big data / low latency) now knows what they need is a CDN or to localize access to services based on GeoIP discovery then this article has helped.

Big data analytics at an elastic scale with minimized end to end latency is hard. There is no optimal commercial or open source solution that has a one size fits all form factor. The economy afforded by scale is not equivalent to the scale of the low latency economy. The former is relatively cheap. The latter is relatively expensive.

For example: GPU folk often talk about ‘speed’ when they really mean ‘high bandwidth’. Being able to do a truck load of processing in 50 millis is great, unless you just need to process a single event in a handful of microseconds. Just like 50 odd socks is a nightmare when you just want a single pair of socks. Context is key.

Last but not least: Latency, throughput, scale, volumetric, computational complexity… these aren’t numbers. We need the equivalence of a control structures (sequences, statements, selections) formalism for big data low latency analytic environments.

So my only constructive feedback would be to include a frame of reference and context in your postings so it’s clear (except to trolls and nitpickers, who are never happy anyway) to the audience what the non-functional characterstics are. The context.

An example with ‘low’ latency: If this is ‘human interaction time’ and it’s serialized (single human at a time) over the web then 5 updates a second aught to be enough, right, say to ‘select-then-click’ a button? Replace the wetware with, a web-spider or web-robot. Now replace the web-robot with a legion of DDOSsing zombie robots.
5 days ago

MattStop Following Follow Matt

Matt Pouttu-Clarke • Well yes and no. I am talking about latency as a component of user
perceived performance in a RESTful service. Not sure what HPC architecture
has to do with that, unless the workload is extremely compute intensive I
get along fine with standard EC2 large instances. Then again, I am not
calculating Pi to the trillionth digit on every request either!

Right, you are correct, “out of the box” EC2 does not support sharding. If
you shard you can handle almost size of data with consistent low latency.


• HPC nodes on EC2 have little to do with compute intensive loads in this context. In fact, I use them for applications that have very little CPU intensity. What HPC nodes *do* have is low latency variance and consistent cross-sectional bandwidth. This allows some latency sensitive applications to be run on HPC nodes that cannot be run on normal EC2 nodes.

Normal EC2 instances tend to have high latency variance that damages the performance of latency sensitive operations, particularly if there is any level of cooperation between nodes. As a consequence, many applications that are not usefully shardable on normal EC2 are at least somewhat shardable on the HPC nodes. The HPC nodes were designed for CPU-intensive loads but many people use them for their low, consistent latency characteristics.


I agree, predictable low latency means [serious] dedicated hardware, and HA means private infrastructure. That pretty much rules out [budget] public utility computing providers including Amazon EC2.

But that’s if you want it all, no hostages taken. If you are ready to sacrifice predictability or availability, Amazon EC2 may be an option. But then, it will be neither low latency nor HA.

The moment you have virtualization (like in case of AWS), you added to the latency. All the techniques mentioned in the blog post help in reducing the visible latency to the end user. But i guess we need to understand low latency with through put from the systems before making sense.


Its one thing to reduce latency on a system like EC2 however you have latency built in because your environment is virtual. You have IO between system and disk, you have latency because your OS is virtual-ized and you have an added context switch.

To some here, low latency means removing as much of the delays as possible and in today’s climate, that means fast switches, fast CPU, fast Disk, and limit the amount of wire you have to travel.

To achieve low latency is not cheap.

Attempting to do low latency on EC2 is like amateur mechanics building a kit car in their home garage and expecting it to compete against a professional pit crew.

You can tune your home kit to a point, but its not going to be considered low latencyon EC2

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Do Google apps mess up your Blackberry really bad?

Do Google apps mess up your Blackberry really bad?

It seems the Maps, News, and Gmail apps screwed my Blackberry Curve pretty badly. I just took out the battery to zilch it, remove Google’s apps, and everything is running fine again.

Wierd?

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Questions on mobile development? Android vs iPhone or iPad or iPod apps market potential? #iphone #android

Questions on mobile development? Android vs iPhone or iPad or iPod apps market potential? #iphone #android
I went to some Meet up for iPhone developers yesterday. Just like Apple, there was the occasional douche bag who really thinks Apple iPhone, iPad, and iPod development is great. From what I know, it seems many developers are not willing to learn a new language like Objective C. I also have researched it is a very nice language with type safety and the usual. As the world works with Java, this is one compelling reason Android will take off. It already has with over one hundred thousand application out there. Also, think about this poll at:
http://www.computerworld.com/s/article/9174486/Developer_enthusiasm_for_iPad_slackens_as_Android_surges
http://techrepublic.com.com/5208-13630-0.html?forumID=102&threadID=327920
These are not sites written by start up kids who know everything about the computer industry. They are industry leaders which of course include CNET and Computerworld.
It seems Android has the potential but when I look at my site stats, mobile users only represent a total of a whopping two percent. I mean, Apple iPod, iPad, and iPod are clear winners with a little Android. The others like Windows, Palm, or Blackberry, or Nokia Symbian are not even worth mentioning as it such a small market.
I am starting to see an explosive growth in iPad. For a product for being out there for a short time, I am seeing an explosive growth at some point but iPhone is the clear winner. I circle back now, is it work killing myself to focus on iPhone app development? With only two percent of my total traffic, it is quite not worthwhile in pursing at this point.
As it stands, one person named Twanda is working on what appears to be a very solid iPhone app which will leverage off of QuantLib. Maybe I should wait on that?

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