1 Briefly define the following and discuss their major trade

1.     Briefly define the following and discuss their major tradeoffs (advantages/costs). What problem are they addressing?

1.     Block buffer cache

2.     Hamming Codes

3.     RAID

4.     Ceph

Please list out their advantages/cost too.

Solution

1. Block buffer cache:When a process wants to access data from a file, the kernel brings the data into primary memory and alters it.then request to save in the file system.

advantages

better performance

faster system response

disadvantages/tradeoff\'s

1.consumes more system memory for cache implementation

2.hamming codes: set of codes which are used for error correction process while moving a data from one host to other or while moving a data over a network from one system to other.

advantages:

1) check and remove errors from code received over a network

3.RAID:( redundant array of independent disks) is a data storage virtualization technology that combines multiple physical disk drive components into a single logical unit .

Advantages:

better performance

for backup in case of system failures

simultaneos I/O operations

provide more relaible data

tradeoff of RAID

Diffult data recovery

does not always ensure better performance

does not completely protect data

may slower the systemm,if not used properly

Ceph: It is a POSIX-compliant filesystem that uses a Ceph Storage Cluster to store its data. This filesystem is distributed in nature

Advantages:

makes object flexible

path and location independent

platform and hardware independence

Tradeoff

design to run only in commodity hardware