Best Data protection assignment help
What is data protection and why is it important?
Data protection is the process of safeguarding important information from corruption, compromise or loss. The importance of data protection increases as the amount of data created and stored continues to grow at unprecedented rates. There is also little tolerance for downtime that can make it impossible to access important information. Consequently, a large part of a data protection strategy is ensuring that data can be restored quickly after any corruption or loss. Protecting data from compromise and ensuring data privacy are other key components of data protection.
The coronavirus pandemic caused millions of employees to work from home, resulting in the need for remote data protection. Businesses must adapt to ensure they are protecting data wherever employees are, from a central data center in the office to laptops at home.
In this guide, explore what data protection entails, key strategies and trends, and compliance requirements to keep out in front of the many challenges of protecting critical workloads.
Principles of data protection
The key principles of data protection are to safeguard and make available data under all circumstances. Data protection is used to refer to both data backup & business continuity/disaster recovery (BCDR). Strategies in this field are divided into two sections: availability and management.
Data availability can ensure your company can conduct business from any location as long as you have the data. For instance, if your company’s cloud computing service had an outage or experienced some damage, your information is always backed up on physical servers so you wouldn’t miss a beat..
Data management often includes two key concepts to keep data safe – Data Lifecycle Management, which automatically moves important data off to offline or online storage where it can’t be accessed without authorization, and Information Lifecycle Management, which ideally follows these 3 phases: Information lifecycle management is a comprehensive strategy for valuing, cataloging and protecting information assets from application and user errors, malware and virus attacks, machine failure or facility outages and disruptions.
More recently, data management has come to include finding ways to unlock business value from otherwise dormant copies of data for reporting, test/dev enablement, analytics and other purposes.
What is the purpose of data protection?
Storage technologies that organizations can use to protect data include a disk or tape backup that copies designated information to a disk-based storage array or a tape cartridge device so it can be safely stored. Tape-based backup is a strong option for protecting your data from cyberattacks. They may be slower to access, but they’re also good because they don’t use the internet and are unaffected by threats over the network.
Organizations can use mirroring to create an exact replica of a website or files so they’re available from more than one place.
Backups are no longer a one-time necessity. Instead, the storage snapshot feature makes it so you can have instant access to certain data in case of an emergency, while having permanent records in CDP.
Data portability — the ability to move data among different application programs, computing environments or cloud services — presents another set of problems and solutions for data protection. On the one hand, cloud-based computing makes it possible for customers to migrate data and applications between or among cloud service providers. On the other hand, it requires safeguards against data duplication.
In recent years, many companies have been moving their data backup to cloud servers. In the process, they either upload their data backups to a public server or one maintained by a third party vendor. These backups can replace on-site disk and tape libraries, or they can serve as additional protected copies of data.
Backup has traditionally been the key to an effective data protection strategy. Data was periodically copied, typically each night, to a tape drive or tape library where it would sit until something went wrong with the primary data storage. That’s when the backup data would be accessed and used to restore lost or damaged data.
Backups are no longer a standalone function. Instead, they’re being combined with other data protection functions to save storage space and lower costs.
Backup and archiving, for example, have been treated as two separate functions. Backup’s purpose was to restore data after a failure, while an archive provided a searchable copy of data. However, that led to redundant data sets. Today, there are products that back up, archive and index data in a single pass. This approach saves organizations time and cuts down on the amount of data in long-term storage.
Enterprise data protection strategies
Modern data protection for primary storage also backs up data and protects against the potential problems outlined below.
Media failure. The goal here is to make data available even if a storage device fails. Synchronous mirroring is one approach in which data is written to a local disk and a remote site at the same time. The write is not considered complete until a confirmation is sent from the remote site, ensuring that the two sites are always identical. Mirroring requires 100% capacity overhead.
RAID protection is an alternative that requires less overhead capacity. With RAID, physical drives are combined into a logical unit that’s presented as a single hard drive to the operating system. RAID enables the same data to be stored in different places on multiple disks. As a result, I/O operations overlap in a balanced way, improving performance and increasing protection.
RAID protection must calculate parity, a technique that checks whether data has been lost or written over when it’s moved from one storage location to another, and that calculation consumes compute resources.
The cost of recovering from a media failure is the time it takes to return to a protected state. Mirrored systems can return to a protected state quickly; RAID systems take longer because they must recalculate all the parity. Advanced RAID controllers don’t have to read an entire drive to recover data when doing a drive rebuild, they only need to rebuild the data that is on that drive. Given that most drives run at about one-third capacity, intelligent RAID can reduce recovery times significantly.
Erasure coding is an alternative to RAID that is found in scale-out storage environments. It offers data reliability, often at the expense of performance, which can make it a better choice for systems with limited disk space. This allows for rapid access to commonly used files, while still maintaining fault tolerance.. Like RAID, erasure coding uses parity-based data protection systems, writing both data and parity across a cluster of storage nodes. With erasure coding, all the nodes in the storage cluster can participate in the replacement of a failed node, so the rebuilding process doesn’t get CPU-constrained and it happens faster than it might in a traditional RAID array.
Replication is another data protection alternative for scale-out storage, where data is mirrored from one node to another or to multiple nodes. Replication is simpler than erasure coding, but it consumes at least twice the capacity of the protected data.
Data corruption. When data is corrupted or accidentally deleted, snapshots can be used to set things right. Most storage systems today can track hundreds of snapshots without any significant effect on performance.
Storage systems using snapshots can work with key applications, such as Oracle and Microsoft SQL Server, to capture a clean copy of data while the snapshot is occurring. This approach enables frequent snapshots that can be stored for long periods of time.
When data becomes corrupted or is accidentally deleted, a snapshot can be mounted and the data copied back to the production volume, or the snapshot can replace the existing volume. With this method, minimal data is lost and recovery time is almost instantaneous.
Storage system failure. To protect against multiple drive failures or some other major event, data centers rely on replication technology built on top of snapshots.
With snapshot replication, only blocks of data that have changed are copied from the primary storage system to an off-site secondary storage system. Snapshot replication is also used to replicate data to on-site secondary storage that’s available for recovery if the primary storage system fails.
Full-on data center failure. Protection against the loss of a data center requires a full DR plan. As with the other failure scenarios, there are multiple options. Snapshot replication, where data is replicated to a secondary site, is one option. However, the cost of running a secondary site can be prohibitive.
Cloud services are another alternative. An organization can use replication along with cloud backup products and services to store the most recent copies of data that are most likely to be needed in the event of a major disaster, and to instantiate application images. The result is a rapid recovery in the event of a data center loss.
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