Disk Cache Optimization Using Compressed Caching Technique

RAM: RAM stands for Random Access Memory. It is a bit like a person's short-term memory. RAM is volatile so data only exists only when the computer is turned on, and is used by the operating system and other applications.

RAM (Random Accesses Memory): RAM is used by CPU when a computer is running to store the information that it needs to be used very quickly but it does not store any information permanently.

Level 3 or L3 cache is dedicated memory that works hand-in-hand with L1 and L2 cache to increase computer performance. L1, L2 and L3 cache are computer processing unit CPU caches, verses other kinds of caches in the system such as hard disk cache. CPU cache accommodates the needs of the microprocessor by anticipating data requirements so that processing instructions are delivered without interruption. CPU cache is quicker than random access memory (RAM), and is intended to stop bottlenecks in performance.

i) Memory : cache server (holds recently acesed web pages in its RAM, for spedier aces

Memory refers to the processes that are used to acquire,store,retain and later retrive information. There are three major processes involved in memeory ; encoding,storage,retrieval.

Irregular Access memory is inside the PC which store the information and work with capacity memory to make lessen less and influence space for essential things to like record and documents in light of the fact that for individual protection.

These components can be combined in a large variety of configuration for very simple caching needs, like increasing the performance of the database access for a single application to the client, which very complex needs such as for grid

Cache memory is the fastest memory outside of the CPU, runs at 10-30 ns per access.

The benefit of virtually indexed physically tagged cache is that the translation of virtual address and cache lookup can happen in parallel:

Especially the requests like I/O which requires more space than the predefined size will be benefitted more using the bypassing write cache. Because if the data is stored in cache there are chances of getting the data lost but if the data is moved to the disk instead of using the cache at the intermediate level the chances of getting data loss is

Cache is a volatile form of storage meaning when the computer is turned off, then the data is lost. Cache cost a lot of money to make meaning it has got a higher cost per byte than ram or flash storage. The reason cache is used for storing frequently instructions near or on the CPU is because it's faster than ram and has less latency, but has a higher capacity than registers at a lower but still high cost compared to other types of storage. In conduction is that cache is a high speed form of temporary storage, which acts as a buffer between the ram and the CPU, which stores frequently used instructions which removes the speed decrease from using the system buses and has low latency and cost less than registers and has a higher

When we talk about an on-disk backing store, we usually mean the virtual memory allocated to the physical memory. This virtual memory acts like a ‘backup’ in case we require a little extra physical memory to handle the execution of the active process(es). This memory is usually slower than our RAM, however performance can be optimized by ensuring that only those parts or pages of the process that are active are kept in physical memory. This does agree with the Iron Laws of Memory Hierarchy. RAM is fast and expensive and is used in smaller amounts, while the on-site backing store is usually larger but slow.

Since the invention of the first computer, engineers have been conceptualizing and implementing ways to optimize system performance. The last 25 years have seen a rapid evolution of many of these concepts, particularly cache memory, virtual memory, pipelining, and reduced set instruction computing (RISC). Individual each one of these concepts has helped to increase speed and efficiency thus enhancing overall system performance. Most systems today make use of many, if not all of these concepts. Arguments can be made to support the importance of any one of these concepts over one

2. Page Cache: Page Cache is the first option that you will see as soon as you open the general

one of the important data compression techniques for eliminating the duplicate copies of repeating data is the data deduplication, and has been widely used in cloud storage to reduce the amount of storage space and save bandwidth. This method is useful when there are number of copies that having the duplication in private cloud, which will reduce the amount of repeated files after applying this technique we will be obtaining the files with no duplication .To protect the confidentiality of sensitive data while supporting deduplication, the convergent encryption technique has been proposed to encrypt the data before outsourcing. To better protect data security, this paper makes the first attempt to formally address the problem of authorized data deduplication. Different from the traditional deduplication systems, the differential privileges of users are further considered in duplicate check besides the data itself. We also present several new deduplication constructions supporting authorized duplicate check in private cloud architecture. As we are using the private cloud architecture which makes our processing removal of the duplicate files easily. more than that security that is been provided in this is mostly high . Security analysis demonstrates that our scheme is secure in terms of the definitions specified in the proposed security model. As a proof of concept, we implement a prototype of our proposed authorized duplicate check scheme and conduct testbed