IAS finals Flashcards
In the olden days, backing up of data was performed with no
expectations of immediate availability and recovery in case of a disaster
occurrence. True or False
True
The only method available for backing up data was on tapes
and these were locked with minimum account to security. true or false
true
The backup of data is stored at different locations in offsite storage to
avoid any regional disaster from affecting the stored data. true or false
true
The Cloud-based Backup and DR has its perks of diminished total cost of
ownership but enterprises bear queries regarding security provided by them, which
are being acknowledged. TRUE OR FALSE
true
This
is generally used as an initial backup in every enterprise and subsequently
incremental or differential backups are conducted respectively.
Full back up
type of back up that is repeated after a set of incremental or differential backups to
update the original full backup copy with updates made from previous full
backup
Full Back up
Type of back up and it Consumes massive storage space.
full back up
Type of back up that all changes or newly added data that take place since last full
backup
incremental back up
It is a much faster backups
incremental back up
Efficient use of storage space, as files are not duplicated
incremental back up
Restores are slower (Disadvantage)
Incremental back up
Type of back up all changes or newly added data that took place since last full or
differential backup are backed up and each differential backup is merged into next day’s
differential backup copy making restoration process faster.
Differential back up
Advantages
* Much faster backups
* Faster restores
Differential back up
Not an efficient use of storage space.
Differential back up
Restores are slightly complicated
Differential back up
In combinational backup process, all files and folders selected are backed
up during the initial full backup and updates are backed up in the subsequent
incremental backups.
Full Backup + Incremental Backup
Backup operation on _____ is functioning typically and fresh
supplementary data is available. What Day?
Day one
what day does which is backed up through an
incremental backup?
Day two
what day does This procedure persists till ____ on which a disaster has occurred.
Day 5
Day 1 is for?
Day 2,3,4 is for?
disaster is for?
full back up
incremental back up (new data)
day 5
In combinational backup process, all files and folders selected are backed up
during initial full backup and updates are backed up in the subsequent differential
backups.
Full Backup + Differential Backup
in Full Backup + Differential Backup, the changes backed up in first differential backup are updated in
differential backup.
in Full Backup + Differential Backup, it is repeated after a set of
differential backups to update data
full back up
in Full Backup + Differential Backup, sets of tapes are required to restore data.
last full backup and last differential
backup
in Full Backup + Differential Backup, day 1 is functioning typically and fresh
supplementary data is available
back up operation
in Full Backup + Differential Backup, Day 2 which is backed up through a
differential backup.
Type of back up that all changes that take place since first full
backup copy are backed up.
Incremental forever Backup
Disadvatnage:
Restores require full backup and all incremental backup copies to perform a restore
making it complex
Incremental forever back up
Advantages
* Reduces length of backup window
* No need for scheduling the full backup
* Reduces load on network
* Availability of data
* Transparency in restoration procedure, automated restoration
Incremental forever back up
an initial full backup is conducted and then
incremental backups are performed consecutively.
Synthetic Backup
the name suggests this backup is
not created from original data
Synthetic Backup
Advantages
* Consumes less time to perform backup
* Costs are reduced
* Lower restore time
Synthetic Backup
Disadvantages
* This backup cannot be first backup performed on a system
* It cannot be following backup of a full backup
Synthetic Backup
what are the two most important storage system technologies
file level storage and block
level storage.
it is the process of creating raw blocks of storage, which can be
handled individually.
block
level storage.
This system is commonly used in SAN. It is presented as a hard
disk to the server. The blocks are controlled by the Server based OS.
block
level storage.
it is the process of backing up entire file system if there
is a slight modification in any of the files
File Level Storage
This is the most common storage
system that we find with our hard-drives, NAS systems, which is used to
share files with users.
File Level Storage
They are configured with common file level protocols
such as NTFS (windows) and NFS (Linux)
File Level Storage
This method is cost effective
when compared to block level storage.
File Level Storage
A hybrid model using both levels of
storage can also be used based on the requirement of the enterprise.
File Level Storage
Time period between the disaster occurrence and time where application,
server or business activities are up and running again in their established order can be
defined
recovery time objective.
When a disaster occurs, time period prior to occurrence of a disaster during which
data is lost and is of allowable, limit can be defined as?
recovery point objective.
it is measured in days or hours
Age of Backup
it refers to the time period a backup copy will be retained.
Age of Backup
Time taken for a backup to be successfully executed and stored
- Time taken to backup
Time taken by the server for the recovery of lost data. This depends on
factors such as network speed, size of data, type of network, speed of
the media, etc.
- Time taken to recover
the financial estimate of Backup and
DR plan in an enterprise. It includes both capital and operational
expenses
Total Cost of Ownership
The step-by-step procedure of performing a backup can be defined
in the numbered order.(skip)
Back up operation (skip)
8 step-by-step procedure of performing a backup can be defined
in the numbered order.
1.initiates schedules back up process.
2. retrieval of info from back up catalog
3. load back up media in back up device
4. to sent data to be backed up to storage node
5. sends data and updates back up catalog on server.
6. sends data
7.sends metadata and media information
8.updates back up catalog.
6 step-by-step procedure of performing a recovery can be defined in the
numbered order
- requests for data restore
- scans catalog to identify the data that is to be restored and client that will receive data.
- load backup media in back up device.
- data is read and sent.
- sends restores metadata
- updates back up catalog
it offer built-in features like multi-tenancy,
encryption and compression, which are not offered by tape-based solution.
cloud based solutions
sometimes susceptible to security worries, because data travels over networks,
subject to hacking
cloud based solutions
Enterprise need to keep on increasing the size of online
storage according to growth in data
Storage space
One of the main factors in cloud-based Backup and
DR. It is required for both data transfer and storage operations. It has impact
on recovery timeframe.
bandwidth utilization
Traditional backup solutions can usually
backup any kind of data. true or false
true
