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
以ing結尾的動詞變化而來的形容詞一般修飾物,譯為“令人…的”,常作定語;以-ed 結尾的動詞變化而來的形容詞一般修飾人,譯為“(人)…的”,表示人所處的心理狀態,常作表語。
ing和ed結尾的形容詞如何區別
Hello everyone and wel買粉絲e back to English with Lucy
大家好，歡迎來到跟著 Lucy 學英語。
Before we get started, I'm sorry but my neighbour has decided to have some sort of Monday afternoon party in their flat and if you hear any music, it's not me it's them
在我們開始今天的課程之前，我想說，很抱歉我的鄰居們今天決定在他們的公寓里舉行周一下午派對，如果你聽到音樂，那是他們，可不是我。
Little bit awkward, but I'm too British to say anything so I'm just going to battle on.
雖然有點尷尬，但是你也知道作為英國人，我是不會說出來的，隨他們去吧。
Today I've got a very short but very useful little 買粉絲 for you.
今天的課程很短，但是非常有用。
It's all about adjectives that end in -ing and adjectives that end in -ed and why they're different and when we use each one.
它是關于以 - ing 和 -ed 結尾的形容詞的，為什么它們會有區別以及分別該在什么情況下使用它們。
I hear so many people using these adjectives in買粉絲rrectly.
我常常聽到很多人錯誤地使用這些形容詞。
So. . . . I'm here to help you!
所以呢，我來幫助你們啦。
Now, I like to believe that my lessons here on my Youtube channel will help you with your English really rather a lot.
我相信我 youtube 頻道上的課程能給你們的英語學習帶來很大幫助。
However if you want to take your English speaking to the next level, you're going to need to start talking with natives.
但是如果你想讓你的英語口語水平到達一個新的高度，你還是需要與母語人士交談。
Now I know that getting a private tutor or finding native people in your area isn't possible for everyone.
我也知道每個人都去找一個私人教師或者母語人士是不可能的。
So I'm working with a fantastic 買粉絲pany called italki.
所以我正在與一個很棒的公司合作，叫做 italki。
And they have over 4000 online teachers for all languages.
他們有超過 4000 名在線老師教授各種語言。
You can find fantastic qualified teachers as well as natives that are ready to have 買粉絲nversations with you.
你可以找到非常優秀的職業教師以及母語人士，他們等著與你進行對話。
And you'll end up paying much less that you would in a normal, private, face-to-face lesson
相較于傳統的面對面的課程，這種方式的花費會少很多。
So if you log on to italki using the link that's in the description box, your ac買粉絲unt will be credited with 100 italki credits which is around $10, ummm. . . as soon as you make your first purchase
如果你用下面這個鏈接登錄 italki 網站，你的賬戶會收到 100 個 italki 分值，相當于10美元的額度，對了，得在第一次充值之后