100x Faster DB Queries

23 09 2013


Oracle Promises 100x Faster DB Queries With New In-Memory Option
Posted by timothy on Monday September 23, 2013 @06:00AM
from the now-report-back-on-the-double dept.

Hugh Pickens DOT Com writes"ZDNet reports that Oracle’s Larry Elison kicked off Oracle OpenWorld 2013 promising a 100x speed-up querying OTLP database or data warehouse batches by means of a ‘dual format’ for both row and column in-memory formats for the same data and table. Using Oracle’s ‘dual-format in-memory database’ option, every transaction is recorded in row format simultaneously with writing the same data into a columnar database. ‘This is pure in-memory columnar technology,’ said Ellison, explaining that means no logging and very little overhead on data changes while the CPU core scans local in-memory columns. Ellison followed up with the introduction of Oracle’s new M6-32 ‘Big Memory Machine,’ touted to be the fastest in-memory machine in the world, hosting 32 terabytes of DRAM memory and up to 384 processor cores with 8-threads per core."


iOS7 Lockscreen Bypass

20 09 2013

Forbes’ Andy Greenberg wrote an article on the way someone bypass iPhone’s Lockscreen. Here’s the excerpt :

As the video shows, anyone can exploit the bug by swiping up on the lockscreen to access the phone’s “control center,” and then opening the alarm clock. Holding the phone’s sleep button brings up the option to power it off with a swipe. Instead, the intruder can tap “cancel” and double click the home button to enter the phone’s multitasking screen. That offers access to its camera and stored photos, along with the ability to share those photos from the user’s accounts, essentially allowing anyone who grabs the phone to hijack the user’s email, Twitter, Facebook, or Flickr account.

Read more :

“ss -n” is faster than “netstat -na” on high load servers?

12 09 2013

# ss -n |grep ESTAB |wc -l

# ss -n |grep CLOSE-WAIT |wc -l

# ss -n |grep FIN-WAIT |wc -l

# ss -V
ss utility, iproute2-ss061002