Google Cloud Storage for Disaster Recovery

ACE By islever Editorial Last updated

Planning and implementing storage and data solutions.

Short answer

A Multi-Regional Storage should be used as it provides the necessary geographic redundancy and high availability required for effective disaster recovery.

Question

Your company uses Cloud Storage to store application backup files for disaster recovery purposes. You want to follow Google's recommended practices. Which
storage option should you use?
  1. Multi-Regional Storage Correct Answer
  2. Regional Storage
  3. Nearline Storage
  4. Coldline Storage

Key Takeaways

The exam tests the distinction between cost optimization (Coldline) and reliability/availability (Multi-Regional), with the common trap being to select Coldline due to the word 'backup' without considering the 'disaster recovery' context.

This question tests the selection of Google Cloud Storage classes based on disaster recovery requirements, establishing that Multi-Regional Storage is the correct choice for high availability and durability.

Common mistake: Candidates often choose Coldline Storage because it is designed for long-term archival and backups, overlooking that disaster recovery requires higher availability and durability guarantees than Coldline provides.

Expert Analysis

Why the Answer Is Correct

Multi-Regional Storage is the correct answer because it provides the highest level of durability and availability, which is critical for disaster recovery scenarios. It replicates data across at least two distinct regions, ensuring that if one region experiences a catastrophic failure, the data remains accessible from another region. This aligns with Google's recommended practices for DR where business continuity is paramount.

Why the Other Options Are Wrong

Coldline Storage (D) and Nearline Storage (C) are designed for infrequently accessed data and cost optimization, not for immediate availability during a disaster. Regional Storage (B) offers high durability but only within a single region, meaning it cannot protect against a regional outage, which is the specific risk DR aims to mitigate.

Community Comment Notes

The community is divided, with many users selecting Coldline due to the keyword 'backup'. However, experienced commentators emphasize that 'Disaster Recovery' implies a need for high availability and multi-region resilience, pointing to Multi-Regional Storage. As noted by user JohnnyS20, focusing on 'DR' rather than just 'backup' leads to the correct conclusion.

Official Reference

https://cloud.google.com/storage/docs/storage-classes

This link opens the official vendor documentation in a new tab.

Exam Strategy

Always prioritize the primary objective stated in the scenario. If 'Disaster Recovery' or 'High Availability' is mentioned, look for options that offer redundancy across multiple regions. If 'Cost Optimization' or 'Archival' is the focus, consider Nearline or Coldline.

Frequently Asked Questions

Why isn't Coldline Storage suitable for disaster recovery?

Coldline is optimized for cost and infrequent access, lacking the high availability and rapid retrieval capabilities needed when restoring operations after a disaster.

What is the difference between backup and disaster recovery storage?

Backup storage focuses on long-term retention and cost, while disaster recovery storage prioritizes immediate availability and accessibility to resume operations quickly.

More ACE FAQ →

Discussion 113 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 30 of 113

  1. poogcp 👍 76
    Best Answer is " Archive Storage " https://cloud.google.com/storage/docs/storage-classes But as per the given option next best solution is " Coldline Storage"
  2. zukko78 👍 15
    D is correct, Coldline Storage COLDLINE 90 days 99.95% in multi-regions and dual-regions 99.9% in regions
  3. kaby1987 👍 7 Answered D
    Ans is D. Coldline Storage: If the backups are truly for disaster scenarios and you expect very infrequent access (less than once a year). Here's how other option fits into this context: A. Multi-Regional Storage: This is best for data that is frequently accessed and needs to be highly available. It's ideal for serving content to users globally and for data that is accessed more often. B. Regional Storage: This offers high availability and is suited for storing data that is accessed frequently, but within a specific region. It's good for data used in compute operations in the same region. C. Nearline Storage: This is a low-cost option for storing infrequently accessed data. It's ideal for data that is accessed less than once a month. There are costs associated with accessing the data, so it's better for data that you don't expect to access frequently.
  4. ovokpus 👍 7 Answered A
    DISASTER RECOVERY!!! Multi-Regional Storage indeed offers the highest level of durability and availability among the storage classes in Google Cloud Storage. It is specifically designed to store data that is geographically distributed and needs a high level of reliability. By replicating the data in at least two separate regions, it ensures that data remains accessible even if one entire region goes offline. Given this context, for disaster recovery purposes where the highest level of availability and durability is required, Multi-Regional Storage is the recommended storage class. So, the correct choice is: A. Multi-Regional Storage.
  5. Mutune 👍 7
    Perfectly stated
Show 25 more comments
  1. JohnnyS20 👍 5
    Correct answer: Multi-regional Most people are trapped immediately by the keyword 'backup' and the need to lower down the cost. While keeping the cost down is a must in every decision we make, the real keyword here is 'DR - Disaster Recovery' When you're talking about DR, you are assuming that a disaster which may cause an entire datacenter or even a region to go down may happen anytime. This means the backups must be stored somewhere that is HIGHLY AVAILABLE. If we're talking "Highly available", then we can already go straight to Multi-regional storage as your backups are safely stored in another region in case the primary region goes down
  2. Jatin1995 👍 5
    If 'disaster recovery purposes' is the key then 'A' (Multi-Regional Storage) is the answer. If 'store application backup files' is the key then 'D' (Coldline Storage) can be the answer. So what should be the correct answer then ?
  3. AIMK 👍 4 Answered D
    there's some disagreement in the comments about this one. Going through some links about cloud storage I found this: Cloud Storage Coldline: a low-latency storage class for long-term archiving Coldline is a new Cloud Storage class designed for long-term archival and disaster recovery. Coldline is perfect for the archival needs of big data or multimedia content, allowing businesses to archive years of data. Coldline provides fast and instant (millisecond) access to data and changes the way that companies think about storing and accessing their cold data. Based on this, D is correct. Refer to this link for more information: https://cloud.google.com/blog/products/gcp/introducing-coldline-and-a-unified-platform-for-data-storage it explains the functions of each one of the options (Multi-regional, Regional, Nearline and Coldline)
  4. Sami_27 👍 4
    No, archive storage might not be the correct choice as we need to consider the access time. Coldline Storage provides relatively faster access times compared to Archive Storage, which is important if you need to recover data quickly in a disaster scenario. Coldline Storage: Fits well with disaster recovery use cases where data is infrequently accessed but needs to be available relatively quickly if a disaster occurs.
  5. Finger41 👍 4
    Unless a withdraw frequency is mentioned, the recommended practice by google is to use "Archive Storage". However as this is not an available option, then "Coldline Storage" is the next best solution.
  6. blackroca 👍 4
    nearline and coldline are appropriate but for the options available here, coldline will be more appropriate due to the lower access counts and cheaper storage rates.
  7. toasty 👍 4
    Archive storage requires a lot of time to access files, and we are dealing with backups (we require fast acess times to restore service)
  8. sinh 👍 4 Answered A
    disaster recovery purposes = Multi-Regional Storage https://cloud.google.com/storage/docs/locations#location_recommendations
  9. lonewolfngp 👍 4 Answered A
    for disaster recovery multi region is recommended.
  10. yeanlingmedal71 👍 3 Answered D
    Next best answer to Archive Storage is Coldline. Coldline is a Cloud Storage class designed for long-term archival and disaster recovery. Coldline is perfect for the archival needs of big data or multimedia content, allowing businesses to archive years of data. Coldline provides fast and instant (millisecond) access to data and changes the way that companies think about storing and accessing their cold data. Google Cloud Storage Multi-Regional is a highly available and geo-redundant storage class. It’s the best storage class for business continuity, or for serving multimedia content to geographically distributed users. Google Cloud Storage Regional is a highly available storage class redundant within a single region. It’s ideal for pairing storage and compute resources within a region, to deliver low end-to-end latency and high throughput for workloads such as data transcoding or big data analytics workloads
  11. JoniMONI 👍 3 Answered C
    The correct answer would depend on the specific requirements of the backup files. If the backup files need to be accessed infrequently and data retrieval within several hours or days is acceptable, then Coldline Storage would be the most cost-effective option. If the backup files need to be accessed within seconds and the cost is not a concern, then Nearline Storage would be a suitable option. If the backup files need to be accessible at all times and the cost is not a concern, then Multi-Regional Storage would be the best option as it provides high durability and availability, as well as low latency access to your data. It is important to consider the specific requirements of your backup files and choose the storage option that best meets those needs.
  12. AgentR 👍 3 Answered D
    Best Answer is Coldline. Please dont use to much of brain to answer this question. The question is very vague and assuming something is where most people got it wrong. Question is clear. Disaster recovery and best practices. Option A is eliminated since we need that kind of storage for frequent retrieval. Option D is best since data is retrived only when we have a DR scenario and it happen once in a blue moon. DO NOT PUT LOT OF THINKING. JUST READ THE QUESTION AND DONT ASSUME ANYTHING
  13. Nikki2424 👍 3 Answered D
    Multi-regional storage = standard storage used only for objects stored in multi-regiones or dual-regions. Regional storage = standard storage used only for objects stored in regions Refer to https://cloud.google.com/storage/docs/storage-classes#legacy Each of the standard, nearline, coldline, and archive storage classes can have any of the location types, i.e., region, dual region, multi-region. Cold-line storage is the ideal option here according to Google's best practices.
  14. ShakthiGCP 👍 3
    Verified Recently. Try to create a new Bucket in GCP and it will give options, Standard/Nearline/ColdLine/Archive. And under Coldline - google mentioned "Best for disaster recovery and data accessed less than once a quarter" .So Answer is - ColdLine and Not 'Archive' if the option is given in the future.
  15. poogcp 👍 3
    correct Answer is " Archvie Storage" But this option is provided here so next best solution would be Coldline Storage. Reference URL: https://cloud.google.com/storage/docs/storage-classes
  16. INASR 👍 3
    Answer is D Coldline is a new Cloud Storage class designed for long-term archival and disaster recovery.
  17. sinh 👍 3 Answered A
    https://cloud.google.com/docs/geography-and-regions
  18. MrZed 👍 2
    To follow Google's recommended practices for storing application backup files for disaster recovery purposes, the appropriate storage option would be: B. Regional Storage. Explanation: Google recommends using Regional Storage for backup files because it provides both durability and lower latency for regional disaster recovery scenarios. Regional Storage ensures that your data is stored redundantly across multiple zones within a specific region, providing high availability and resilience against zone-level failures. It offers a balance between durability, availability, and cost-effectiveness, making it suitable for backup and disaster recovery purposes. Regional Storage is typically more cost-effective than Multi-Regional Storage while still offering a high level of reliability. Therefore, option B is the recommended choice when following Google's best practices for storing application backup files for disaster recovery purposes.
  19. iamshubhampatil 👍 2 Answered A
    The question focuses on "Disaster Recovery" and not cost. For disaster recovery backups in Google Cloud Storage, Multi-Regional Storage (A) is the recommended option. This storage class ensures data is replicated across multiple geographic regions, providing maximum availability and durability. This redundancy protects against regional outages and aligns with Google’s best practices for disaster recovery, which prioritize cross-region replication to minimize downtime and ensure rapid recovery
  20. JackSkeletonCoder 👍 2
    honestly, they should've added archive storage because it is better suited for disaster recovery backup. It is also stated in the doc how archive is better choice than 'coldline storage'. Also in terms of latency, archive will take care of that in events of disaster; as stated in the doc, "In the event of a disaster recovery event, recovery time is key. Cloud Storage provides low latency access to data stored as Archive storage." https://cloud.google.com/storage/docs/storage-classes#archive
  21. SteveXs 👍 2 Answered D
    While multi-regional storage ensures data durability and availability, it is not cost-efficient for backup files that are rarely accessed, such as those for disaster recovery. D is the correct answer as Coldline Storage is designed for long-term storage and infrequently accessed data (e.g., disaster recovery backups).
  22. FernandoJ 👍 2 Answered D
    The recommended option is Archive, but the next best option in this list is Coldline https://cloud.google.com/storage/docs/storage-classes#:~:text=Archive%20Storage%20is%20the%20lowest%2Dcost%2C%20highly%20durable%20storage%20service%20for%20data%20archiving%2C%20online%20backup%2C%20and%20disaster%20recovery
  23. magistrum 👍 2
    The most current answer is Archive storage...unsure if this question will get updated https://cloud.google.com/storage/docs/storage-classes?_ga=2.100245342.-1331405417.1599668379&_gac=1.26969423.1607902528.CjwKCAiAlNf-BRB_EiwA2osbxSJcakZWg1RPV4HNzaWrlSGcB07JrE1B6KZ6OmAh1zgJoQiI_X1QQxoCKRMQAvD_BwE
  24. plazamix 👍 2
    Best answer is D. Coldline Storage. The choices specifically said Multi-Regional and Regional "Storage". Multi-Regional Storage is equivalent to Standard Storage and is different to Multi-regional location. Check additional classes: https://cloud.google.com/storage/docs/storage-classes#legacy
  25. Joseph_Covaro 👍 2 Answered D
    I believe Coldline Storage is the answer in absence of Archive Storage. Note how the bucket is responsible for disaster recovery, meaning it should already be in a different region from our operational data, therefore making Multi-Regional-Storage unnecessary.

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