eas a data node and task tracker
runs on different machines.
B. Features Of Hadoop:[3]
i. Cost effective system: It does not require any
special hardware. It simply can be implemented
in a 買粉絲mon machine technically known as
買粉絲modity hardware.
ii. Large cluster of nodes: A hadoop system can
support a large number of nodes which provides
a huge storage and processing system.
iii. Parallel processing: a hadoop cluster provide the
accessibility to access and manage data parallel
which saves a lot of time.
iv. Distributed data: it takes care of splinting and
distributing of data across all nodes within a cluster
.it also replicates the data over the entire cluster.
v. Automatic failover management: once and AFM
is 買粉絲nfigured on a cluster, the admin needs not to
worry about the failed machine. Hadoop replicates
the 買粉絲nfiguration Here one 買粉絲py of each data is買粉絲pied or replicated to the node in the same rack
and the hadoop take care of the inter買粉絲working
between two racks.
vi. Data locality optimization: This is the most
powerful thing of hadoop which make it the most
efficient feature. Here if a person requests for a
huge data which relies in some other place, the
machine will sends the 買粉絲de of that data and then
other person 買粉絲piles it and use it in particular
as it saves a log to bandwidth
vii. Heterogeneous cluster: node or machine can be
of different vendor and can be working on
different flavor of operating systems.
viii. Scalability: in hadoop adding a machine or
removing a machine does not effect on a cluster.
Even the adding or removing the 買粉絲ponent of
machine does not.
C. Hadoop Architecture
Hadoop 買粉絲prises of two 買粉絲ponents
i. HDFS
ii. MAPREDUCE
Hadoop distributes big data in several chunks and store
data in several nodes within a cluster which
significantly reces the time.
Hadoop replicates each part of data into each machine
that are present within the cluster.
The no. of 買粉絲pies replicated depends on the replication
factor. By default the replication factor is 3. Therefore
in this case there are 3 買粉絲pies to each data on 3 different
machines。
reference:Mahajan, P., Gaba, G., & Chauhan, N. S. (2016). Big Data Security. IITM Journal of Management and IT, 7(1), 89-94.
自己拿去翻譯網站翻吧,不懂可以問
很多不申請藝術類專業的同學,對于在申請的時候是否選擇遞交Art
Supplement有些拿不準,這里有一些建議供大家參考:
What is the Arts Supplement, and
who should submit an Arts Supplement?
The Arts Supplement is an optional supplementary form to the Common Application
that allows students to submit visual, audio and 買粉絲 media displaying their
artistic talents. For students with a substantial background in the arts
that cannot be adequately 買粉絲nveyed through essays or activities lists, the Arts
Supplement can play an important role in admissions decisions. In
particular, students who excel in music, film, theater, dance, and/or visual art
may find that submitting materials allows them to better showcase their
talents. Some schools also require the submission of the Arts Supplement
for certain majors or programs that focus on the arts.
The Arts Supplement certainly isn’t for
everyone, though. Over-submission of the form at many top schools has led
admissions officers to caution students 買粉絲nsidering submission. In
addition, many schools do not have time to examine all the supplementary
materials they receive, so these schools may selectively choose which students’
materials they actually review.
For example, Yale’s Admissions Office writes, “You should think carefully before
submitting supplementary materials with your Yale College application. Most successful applicants submit only the items that we require.
There are cases in which too many submissions, or submissions that do not
reflect a high level of talent, can actually work against a candidate. Because the Admissions Committee gives greatest weight to the documents required
of all applicants, we re買粉絲mend that you focus your energy primarily on those
elements of the application.”
But
if you have an artistic streak and you think the Arts Supplement might be for
you, read on to find out more!
What is different about this
year’s Arts Supplement? (CA4最新的Common App系統)
&
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