Posts (page 2)

This is on the "Edit HTML" button of your WYSIWYG editor.. I found it simple and that's why I am sharing this with you.

.....

var showSource = true;   (Automates the toggling for the same button)

function toggleSource() {

    if ( showSource ) {  //(Make the code editable inside a textarea)

               iView.document.body.innerHTML =

                '<textarea name="txtSourceCode" style="width:100%;height:700px">' +

                           iView.document.body.innerHTML + "</textarea>" ;

      } else {   //(Again read just the text area to show the content in HTML display format)

              iView.document.body.innerHTML = iView.txtSourceCode.value;

      }

      showSource = !showSource;  (This switch will make the reverse action code-display or display-code mode)

}

I am using Amazon EC2 for hosting this.. I feel it is the best option one could have for back up and all other purpose.

1 - First create a SVN user

useradd svn
su - svn
cd ~

2 - Get the latest version of subversion

wget http://subversion.tigris.org/downloads/subversion-1.5.5.tar.bz2
bzip2 -d subversion-1.5.5.tar.bz2
tar -xf subversion-1.5.5.tar
mv subversion-1.5.5 subversion
cd subversion

3 - Put the necessary libraries including the zlib compression and point to your apache installation path

yum install zlib-devel
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/mnt/install/apache/lib

4 - Build Svn

./configure --with-apr=/mnt/install/apache --with-apr-util=/mnt/install/apache
make
make install

5 - Backup unnessary files 

rm subversion-1.5.5.tar
mv subversion subversion.backup

6 - Create a project called proj1 

cd ~svn
su svn
svnadmin create proj1

7 - First create a SVN user

useradd svn

8 - First create a SVN user

useradd svn

9 - In EC2 I prefer /mnt space as it has got 150GB. It stops eating up my primary harddisk. Make a link as root

su - root
mkdir -p /mnt/svn
mv ~svn/proj1 /mnt/svn
cd ~svn; su svn
ln -s /mnt/svn/proj1 proj1

10 - Remove anonymous access and put proper user for access 

mv svnserve.conf svnserve.conf.orig
echo [general] > svnserve.conf
echo anon-access=none >> svnserve.conf
echo password-db=passwd >> svnserve.conf
echo [sasl] >> svnserve.conf
vi proj1/conf/passwd # add necessary users and password

11 - Start the server in demon mode. It runs in port 3690. Punch a hold in EC2 firewall

svnserve -d -r ~svn
netstat --numeric-ports -ap | grep 3690
tools\ec2-api-tools\bin\ec2-authorize default -p 3690

12 - Add repository to Eclipse SVN and have a good night sleep.

# Add in eclipse the url - svn://www.ruklook.com/proj1

We have been doing some work to host a mail server as part of our offering. Google search typically throws up Zombra but there are certain aspects of the license which we are not comfortable especially mobile support. We came up with 2 alternatives which fit our requirements to install on Amazon EC2

Security: We feel comfortable in providing our personal information to fulfill our own need.

Availability: The application should follow the user. Application should have presence in multiple gadgets in 24*7.

Scalability: The application should able to scale explonentially as WORD of mouth. 

Performance: Humans repeat 20% things 80% time.

Usability: The change need to happen at the vicinity of operation.

Adaptability: The environment surrounding us is changing all the time influenced by living bodies.

Communication: 95% communications are non-verbal.

Traceability: Actions by people at a place on time are not accident.

Collaboration: Virtual world and Real world complete each other.

Reporting: Every action has a equal and opposite reaction.

I am fascinated by the Google Map. This is the perfect exploration tool. The journey just gets interesting when I don't know what am I going to discover. 

Imagine a BI product which is built in such a way so that you can ZOOM, PAN, Rotate, Drive in different dimentions, ....  

Like looking at Bangalore from 200sq ft above ground on 1st Jan, 2008 trying to understand why my sales is dropping?  Then seeing the roofs of the profitable shops and loser shops. Finally descending down to the rack. Finally discovering a rat responsible for your losses ...

If this is a reality, what I need..

A raw implementation.. http://www.bizosys.com/tsr/TSR.html

TSR

What should be my backend to provide this infinite resource navigation to minute level ...

Putting the BI engine in steroid =>  Hadoop + Hive + Lucene Katta 

http://www.ewh.ieee.org/r6/scv/computer/nfic/2008/Facebook%20Hive%20by%20Ashish%20Thusoo.ppt
 
http://joa23.files.wordpress.com/2008/10/katta-in-production.pdf
 
What's your suggestion to make game interesting??

Anyone in India is prone to those automated daily marketing calls. I hated that someone could just call me anytime they wished to. Initially it was just one call a day at around 9AM but last 2 months it increased to 4-5 calls starting at 9 AM and as late as 8:30 PM. I created a contact for these numbers (there were 3 of them) and not take the call. One day I decided to just take the entire call, it lasted for about 4 mins, the automated message repeated for 5-6 times. I thought atleast the other side will incur some cost when they call me. Surprisingly the next day the calls came down to 3. I did the same 2 more times and calls stopped altogether. I do get an odd marketing sms but the calls completely stopped.

I wanted a multi tenancy database with no prior knowledge of data. It's like what database I should use to develop a SalesForce like infrastrcuture. Finally, one thing which came closure to my consideration was HBase. I liked the way they are going and the Amazon platform is best suitable for this. The HBase as mentioned is perfect for stortage and retrieving the information on a primary key. But what about the searching piece.  In the onelineweb we put the following mechanism:

Assumptions

1 - Data reading is 5 times than data creation.
2 - Active workflow records only change

Problem Faced

Each node maintains their local Solr instance. All solr indexes in the active nodes are alike. Updating the solr indexes need to be incremental in nature. The information can change in any node. 

The Solution

I created a sync table. When ever a record change, I put an entry to this sync table. Each machine maintans the last sync id. I get all the latest content from this last sync id and update the solr instnace.

The Solr index can go large. To distribute the solr index in many nodes, we need to have a platform to assemble it from all these places and serve it. The architecture is to have a common set of actively changing information and other nodef having frozen records which don't change often. We use the map reduce paradigm for managing the distributed solr index.

• The trend of "NO SOFTWARE" and only configurable system like SalesForce will be predominant in the market
• Softwares will be learning from expert humans. One of my friend shared how the robots paint a car. First time an expert painter paints the car. Robot records this and replays the operation from there on. 
• Most of the applications will communicate among themselves with no prior knowledge about their existance. JINI and browser will be their gossiping point and information exchange mandi.
• There will be huge need of Creative People ( Ex. Graphics Designers ). The human count of Indian Software Offshoring will be stagnant and will reduce.
• The new generation computers will aquire IO, CPU and Memory from the cloud
• Now humans follow the application in the sense come near to a desktop browser to access. In 2013, the application will follow the user with it's presence in all devices used by humans (Ex. Mobile, Watch, TV ).
• The applications will have multiple input medium (Not just mouse and keyboard).  Some of the new input sensors will be the things we look at , words we speek, the route we take, the friends we shake hand, our gestures, sitting  standing and sleeping positions  ....

The last post and this one I am writing the ideas that went in our products. If you need details on the product please visit drapsa site.

Any BI product needs a good data store to power the queries on a large dataset. Some of the work is done prior in way of building the cubes. Any adhoc queries or aggregation of data is done on the fly. Sybase and other database vendors including a couple of startups have proposed column oriented databases as a better model for the datastore as cubes aggregate data on a couple of columns at a time. Very compelling and results are there to see in live production environments.

In our design we made use of a search engine as the underlying datastore. Search engine index is optimized column wise like column oriented databases. Databases have largely grown from managing a small set of data very effectively with transaction semantics and ACID rules. As the dataset grew in BI scenarios more and more hardware and software designs have been employed to tackle it - example disk partitioning both physical and logical etc. Search engines on the other hand started with a paradigm of managing a large set of data primarily for read operations. No burden of supporting transaction semantics like a database. A BI product in that context is ideally suited to be served by a search engine.

Using flex on the front end alleviates load on the server to just serving search results. The heavy lifting of preparing visually rich charts is done very well by flex. So most of the server queries return in under 50ms and data transfer stays under 10K with compression enabled. Flex is optimized for the UI so the end response time is pretty good. If data is to be clustered (for redundancy or scalability) across search engine instances integration can happen at the UI so there is no single point of failure nor additional load on the server.

We have recently worked on a shopping cart optimized for grocery. Web is ready to a demo state and mobile is in the works. You can experience it here. It is done in flex so the first time load may take about 30 seconds.

But why build another shopping cart from scratch when the concept has been done to death in all conceivable forms - free, commercial, custom built, SaaS? There are certain characteristics to every shopping experience. Mobile shopping is largely centered on comparison (unless it is an iphone), nokia site illustrated this nicely. Similarly grocery shopping has to be done quickly as the list of items is known and it is typically a sizable one. Invite you to experience it and share your feedback. ---Thanks