Your company runs several databases on a single MySQL instance.
They need to take backups of a specific database at regular intervals.
The backup activity needs to complete as quickly as possible and cannot be allowed to impact disk performance.
How should you configure the storage?
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A. B. C. D.B.
To take backups of a specific database in a MySQL instance, there are different options available, and the best approach depends on the specific requirements and constraints of the use case. In this scenario, the goal is to take backups at regular intervals without impacting disk performance.
Option A: Configuring a cron job to use the gcloud tool to take regular backups using persistent disk snapshots is a possible solution. This approach can take advantage of the built-in snapshot feature of persistent disks, which creates a point-in-time copy of the disk data that can be used to restore the disk or create a new disk with the same data. The advantage of using snapshots is that they are incremental, meaning that only the changes made since the previous snapshot are saved, reducing the backup time and the impact on disk performance.
Option B: Mounting a Local SSD volume as the backup location and then using gsutil to move the backup to Google Cloud Storage is another option. Local SSDs are ephemeral and do not persist data after the VM is terminated or migrated. However, they provide high IOPS and low latency, which can speed up the backup process. After the backup is complete, the backup data can be moved to a more durable and scalable storage option, such as Google Cloud Storage.
Option C: Using gcsfise to mount a Google Cloud Storage bucket as a volume directly on the instance and writing backups to the mounted location using mysqldump is another possible solution. This approach leverages the scalability and durability of Cloud Storage and allows the backups to be stored remotely, reducing the risk of data loss due to local hardware failures or disasters. However, it requires the use of a third-party tool to mount the Cloud Storage bucket as a file system, which can add complexity and overhead. Additionally, using mysqldump to create backups can be slower than using snapshots or other disk-level backup methods.
Option D: Mounting additional persistent disk volumes onto each VM instance in a RAID10 array and using LVM to create snapshots to send to Cloud Storage is another option. This approach provides redundancy and fault tolerance by using a RAID10 array, which mirrors data across multiple disks while striping it for performance. Additionally, using LVM can provide a more flexible way of managing the disk space and creating snapshots. However, it can be more complex to set up and maintain than other options, and it may require more storage resources than using snapshots or Cloud Storage.
Overall, each option has its pros and cons, and the best choice depends on the specific requirements and trade-offs of the use case. If the goal is to minimize backup time and impact on disk performance, using snapshots or Local SSDs may be the most suitable options. If scalability and durability are a priority, using Cloud Storage may be the best choice. Finally, if fault tolerance and flexibility are key concerns, using RAID10 and LVM may be the optimal solution.