Android Development Notes

Android Development Screen shots Notes, showing my settings, and most especially space costs on my dual OS laptop.

I dual boot into Windows 10 or  Ubuntu 16 on my laptop, l find the later faster and more Android sdk development simpler since l have to disable Hyper-V which l need on Windows 10 if l setup my full Android development on it – including emulator for testing.

Note, the complete tools below l chose and use take a lot of space. In my case, 30Gb, so plan accordingly.

Choice of SDK platforms.

My current phone is the LGG5 – running Android 7.0, however l also own an older Nexus 6 [no sim card/wireless plan] which l use for Android development testing running Android 7.1.1 [google nexus phones get the latest android releases frirst, unfortunately at least the nexus 6P not 6 is required for Android Oreo/8] 🙁 , and one of my target platform is Ikechukwu’s older samsung galaxy tablet which runs Android lollipop 5.0.1

I also chose Android MM – Marshmellow 6.0.1 since l have a tester using that version residing in Jos/Lagos on his phone – onijec [click here for his twitter link].

I want to test developing a small birthday countdown app for Ikechukwu, see if this works on multiple Android versions, test and use my google developer account/playstore and non playstore app distribution – before diving into more deep stuff like geo location based apps l am more interested in.

 

 

Top500 2017

“The Top500 list the 500 fastest computer system being used today. In 1993 the collection was started and has been updated every 6 months since then. The report lists the sites that have the 500 most powerful computer systems installed. The best Linpack benchmark performance achieved is used as a performance measure in ranking the computers. The TOP500 list has been updated twice a year since June 1993.”

“Mflop/s is a rate of execution, millions of floating point operations per second. Whenever this term is used it will refer to 64 bit floating point operations and the operations will be either addition or multiplication.

Gflop/s refers to billions of floating point operations per second and Tflop/s refers to trillions of floating point operations per second.”

Source:  Top 500 website

Below is the result of my laptop running Linpack.java  : 228MFlops !!!  🙂

Below is the current 2017 top500 results

Super Computing conference comes to Portland, OR

I attended the 2006 event in Seattle, WA – learning about building super computers using Windows Computing Cluster, Rocks [Linux] etc and various applications of super computing / high performance computing which include designing the new Boeing Dreamliner 787, health and weather forecasting etc, crunching tons of seismic research data etc. Here is the link. This event will be held at OCC – Oregon Convention Center, November 14-19 2009.

Microsoft Certified Technology Specialist: Sql Server 2008…

mctsrgb

Passed my Microsoft Cerfification Exam on first attempt on Tuesday June 2nd! Score: 814

The certificate says l’m now recognized as a MCTS – Microsoft Certified Technology Specialist: SQL Server 2008, Implementation and Maintenance. The exam is the MCTS 70-432. Next goal is the 70-450 which has no study book in print, and the only material l can find so far is the CBT-NUGGETS training video on Exam 70-450 which is very good.

Materials l used to study other than multiple SQL Server instances on my laptop, Virtual PC Windows 2008 Machines with SQL Server 2008 installed – for database replication, mirroring and failover clustering practise!!!
– MCTS Self-Paced Training Kit (Exam 70-432): Microsoft® SQL Server® 2008 – Implementation and Maintenance by Mike Hotek (Very good, in-depth all round material, lab oriented book with real life stories). This seems to be the only main book out there.
– Self Test Software for MCTS 70-432, bought the download version of this excellent practise test program.
– Microsoft Sql Server 2008 Books on line (download the latest update from Microsoft)
– Took the official Microsoft 6231 course at SQLSoft (Beaverton)
– Books on Microsoft SQL Server 2005 exam 70-431

Microsoft Sql Server Administration…

Useful commands I’ve found from various sources for Microsoft Sql Server 2005/2008 include:

EXEC sp_configure
GO
–Instance level principals.
SELECT * FROM sys.asymmetric_keys
SELECT * FROM sys.certificates
SELECT * FROM sys.credentials
SELECT * FROM sys.linked_logins
SELECT * FROM sys.remote_logins
SELECT * FROM sys.server_principals
SELECT * FROM sys.server_role_members
SELECT * FROM sys.sql_logins
SELECT * FROM sys.endpoints
GO

–Database level principals.
SELECT * FROM sys.database_principals
SELECT * FROM sys.database_role_members
GO
ALTER LOGIN sa WITH NAME = hiddenSaAccount
GO
–Check your user execution context
SELECT SUSER_SNAME(), USER_NAME()
GO
–View the list of objects in the database
SELECT * FROM sys.objects
GO
–Change user context
EXECUTE AS USER = ‘AnotherUserName’
GO
–Return to your login
REVERT
GO
–explore database files
select * from AdventureWorks.sys.database_files
select * from master.sys.database_files
select * from msdb.sys.database_files
select * from tempdb.sys.database_files
–explore endpoints
select * from sys.endpoints
select * from sys.tcp_endpoints
select * from sys.http_endpoints
select * from sys.database_mirroring_endpoints
select * from sys.service_broker_endpoints

–Security

SELECT * FROM sys.symmetric_keys
GO

SELECT * FROM sys.certificates
GO

Build your own Virtual World…

Check out this amazing video – World Builder by Bruce Branit Some day l guess we might be building entire cities virtually like this, walk through them and then create them. Beats a 3D object molder.

Heres a direct link to the quicktime .mov file for faster viewing on your PC. [ Right click, save as, download]