Address: http://www.csdn.net/article/2014-06-03/2820044-cloud-emc-hadoop
Abstract:As a leading global information storage and management product company, EMC recently announced the acquisition of DSSD to strengthen and consolidate its leadership position in the industry, we have the honor to interview Zhang anzhan of EMC China recently. He shared his views on big data, commercial storage, and spark.
Speaking of big data, Zhang anzhan believes that big
please contact the author for authorization, non-commercial reprint please specify the source.CNN Method:
Based on region proposal (stage): R-cnn family, including faster R-cnn/mask R-CNN/RFCN
However, DPM fire not to 2 years, the R-cnn family appeared, and finally no longer with a variety of magic revision hog features to detect!One of the most representative of the R-cnn family is faster r-cnn. Faster R-CNN by RPN Network first generated region proposal, and then proposals to th
name nbs P volgroup system ID Format lvm2 metadata areas 1 Metadata Sequence no3 vg access Read/write NBSP;NBSP;VG status resizable max lv 0 cur lv n bsp; 2 open lv 2 Max pv 0 cur pv nb Sp 1 aCT pv 1
VG Size 18.80 GiBPE Size 4.00 MiB total PE 4813 Alloc pe/size 4813/18.80 GiB free pe/size 0/0 VG UUID Xdh5kq-vkjk-nroe-dssd-mi1h-sqgk-r07ton
4. Expansion of VG
Vgextend VOLGROUP/DEV/SDB1
Let's take another look at the example of value passing and reference passing: // value is passed, passing the value itself . int Ten ; int m = N; + ; Console.WriteLine (n); // Ten Console.WriteLine (m); // + //
//
P1 P2 points to the address on the same heap // Changing the age that age,p1 points to by P2 changes the person p1 = new person (); P1.age = 20 ; person P2 = P1;
#字典Dict,dict Full Name dictionary, also known as map in other languages, is stored using key-value (Key-value) and has a very fast lookup speed.Dict key (value) contains list and Tuple,key immutable, key can be tuple (tuple cannot become list, list variable)>>> B = {"A": 1, "B": "Sad", "C":(1,["DSSD"])}>>> b{' A ': 1, ' B ': ' Sad ', ' C ': (1, [' DSSD '])}>>> Typ E (b) #setSet is similar to Dict and is a s
SA: A structured analysis method for data flow
JSD: Jackson method for data structure
DSSD; method of developing structured data systems
ooa: Object-oriented parsing method
The principle of software requirement analysis
decomposition, simplification and abstraction
Abstract
.
· Content management. EMC Documentum and HP autonomy also have slight business overlaps.
· Big data: EMC pivotal and HP Autonomy/vertica compete in part.
Let's take a look at the small competition between the two companies:
· EMC owns VMWare, the king of server virtualization software, while HP is no. 1 In the X86 server market. The merger of the two companies is conducive to product integration.
· HP does not have rack-scale flash array technology such as emc
1. The conversion between integers, floating-point numbers, and strings in RubyThe classes of ruby integers, floating-point numbers, and strings provide to_i,to_f,to_s three methods for converting integers, converting them to floating-point numbers, and converting them into strings.2. Array traversalExample 1:a=['a','b','C']a.each {|x|puts X}Example 2:ps=["EMSD","XIO","DPAD","ISD","DSSD","ASD","VCE","RSA","IIG","N /A"]ps.each{|x| Innovationproduct.cre
. Flasharray//M20 is an entry-level device. The 3u-5u box supports scaling from 5TB-40TB to 250TB of usable capacity. Performance up to 200,000 (32K block) iops,//m50 in 3u-5u box supports 20TB and 176TB bare capacity, supports scaling to 500TB usable capacity, 270,000 IOPS.The MLC Flash chip is used in the flasharray//m new array. Purestorage feels that MLC will be the trend that he is able to achieve SLC the same durability level.Flashblade is a rack-scale flash system for pure storage. Using
Software, including support software and utility software
Make a schedule, including delivery date, how to organize the distribution of power
Software costs, as long as both sides can accept
2. Software Requirements Analysis
(1) The task of software requirement analysis
① deeply describes the function and performance of the software
② determine the constraints of software design and the interface details of software with other system elements
③ defines other validity requirements for software
P
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