You have one primary HMaster and one standby. Your primary HMaster Falls fails and your client application needs to make a metadata change. Which of the following is the effect on your client application?
Answer(s): A
You have an average key-value pair size of 100 bytes. Your primary access is random needs on the table. Which of the following actions will speed up random reading performance on your cluster?
Answer(s): D
The cells in a given row have versions that range from 1000 to 2000. You execute a delete specifying the value 3000 for the version. What is the outcome?
Answer(s): C
http://archive.cloudera.com/cdh4/cdh/4/hbase/book.html#delete (scroll below and see 5.8.1.5. Delete topic, read the last paragraph)
You have an "Employees" table in HBase. The Row Keys are the employees' IDs. You would like to retrieve all employees who have an employee ID between 'user_100' and 'user_110'. The shell command you would use to complete this is:
Under default settings, which feature of HBase ensures that data won't be lost in the event of a RegionServer failure?
http://tm.durusau.net/?p=27674 (See `From the post' second paragraph)
You have two standbys and one primary HMaster. Your primary HMaster fails. Which of the remaining HMasters becomes the new primary?
Data is written to the HLog in which of the following orders?
You have a table with the following rowkeys:r1, r2, r3, r10, r15, r20, r25, r30, r35In which order will these rows be retrieved from a scan?
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q252: dns poisoning is the correct answer, not locator redirection. beaconing is detected from a host. this indicates that the system has been infected with malware, which could be the source of local dns poisoning. location redirection works by either embedding the redirection in the original websites code or having a user click on a url that has an embedded redirect. since users at a different office are not getting redirected, it isnt an embedded redirection on the original website and since the user is manually typing in the url and not clicking a link, it isnt a modified link.
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