All categories

4 years ago

For an external usb hard drive attached to a computer, which is more suitable: a writethrough cache or a block cache

2 answers:

6 0

Disk access is way slower than memory access. Caching is a technique to improve the disk access time. Block cache is a caching technique which reduces disk accesses time. Here a portion of disk is bought to cache for reading and a modified blocks are first changed in cache but reflected in the disk at one go. On the other hand with write through caching each modified block is written to cache and at the same time it is written to the disk. Write- through caching requires more disk I/O so they can have a negative effect on the performance.

Stolb23 [73]4 years ago

3 0

Answer:

block cache

Explanation:

An integrated cache is a layer of memory that automatically caches frequently accessed data through the source database.

Block cache is used to store blocks read from disks. This means that a small buffer cache will cause Oracle to cache data blocks following the LAST RECENTLY USED list, and depending on how often this happens, can lead to a drop in performance.

There is no magic to sizing the block cache, what you usually do is estimate an initial size and monitor the hit, if it is not optimal, you will need to lengthen and repeat the monitoring cycle.

You might be interested in

3. Encode these sentences in ASCII: a. "Stop!" Cheryl shouted. b. Does 2 + 3 = 5?

Zepler [3.9K]

Answer:

"Stop!" Cheryl shouted.
34, 83, 116, 111, 112, 33, 34, 32, 67, 104, 101, 114, 121, 108, 32, 115, 104, 111, 117, 116, 101, 100, 46

Does 2 + 3 = 5?
68, 111, 101, 115, 32, 50, 32, 43, 32, 51, 32, 61, 32, 53, 63

I got these numbers with this python code:
print([ord(c) for c in '"Stop!" Cheryl shouted.'])
print([ord(c) for c in 'Does 2 + 3 = 5?'])

4 0

2 years ago

.Why are protocols important for networking?

NNADVOKAT [17]

Answer: Networking protocols are important as they define a set of rules to be used for exchanging information between computer nodes.

Explanation:

in terms of networking it is required for the source and the destination to have a set of predefined rules which enables the router to send and receive information across the network in such as way that both the ends are able to receive the messages.

The information exchange takes place first by the client by introducing itself to the remote server. the remote server upon receiving the information uses some form of handshaking and acknowledges the client of the receipt of the message.

besides this there are many routing protocols which tells us about the way how packets are sent from the client to the source. There are two types of routing protocols:

1. static routing protocols

2. dynamic routing protocols.

6 0

3 years ago

Which function returns the rank of a value within a dataset, assigning an average rank for tied values

ANTONII [103]

Z-y bcuz it is a function and u need to revail rate

4 0

3 years ago

What are the benefits of BYOD to organisations<br><br><br><br>

lara [203]

Answer:

Hello, the benefits of BYOD organizations are,

greater flexibility.

increased workforce mobility.

increased efficiency and productivity.

higher employee satisfaction.

allows greater choice in device type.

cuts down hardware spending and software licensing costs.

cuts down on device management for business-owned devices.

Hope this helps :)

5 0

2 years ago

What is the basic similarities and difference between the three project life cycles model?

MAVERICK [17]

Answer:

Project life cycle is the time taken to complete a project, from start to finish.

The three project life cycles model include the following:

Predictive
Iterative and Incremental
Adaptive

Explanation:

Predictive project life cycles model: In this stage, the three major constraints of the project which are the scope, time and cost are analyzed ahead of time and this analysis is well detailed and the detailed scope of the project is done right from the start of the project.

Iterative and Incremental life cycles model: In this iterative and incremental model, the project is again split into stages that can be sequential or overlapping and at the first iteration of the project, the scope is determined ahead of time.

Adaptive life cycles model: Also in this stage, the project is split up into phases but because these phases are more rapid and ever changing unlike the other models, the processes within the scope can work in parallel.

Similarities

They make use of high level planning.

They are sequential and overlapping.

They make use of high level scope.

Differences

The predictive life cycle model makes use of a detailed scope at the beginning of a project while the other models make use of detailed scope only for each phase.
In predictive life cycle model, the product is well understood, in other models, the projects are complex and not easily understood.
There is periodic customer involvement in predictive and interative life cycle model while the customer involvement in the adaptive model, the customer model is continuous.

3 0

3 years ago