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  • AWS Certified Solution Architect Associate preparation S3 Standard question

     KBO updated 3 years, 1 month ago 2 Members · 11 Posts
  • KBO

    Member
    January 21, 2021 at 9:26 am

    A company has both on-premises data center as well as AWS cloud infrastructure. They store their graphics, audios, videos, and other multimedia assets primarily in their on-premises storage server and use an S3 Standard storage class bucket as a backup. Their data is heavily used for only a week (7 days) but after that period, it will only be infrequently used by their customers. The Solutions Architect is instructed to save storage costs in AWS yet maintain the ability to fetch a subset of their media assets in a matter of minutes for a surprise annual data audit, which will be conducted on their cloud storage.

    Which of the following are valid options that the Solutions Architect can implement to meet the above requirement? (Select TWO.)

    S3 Standard storage no longer requires 30 days minimum storage. S3 are charged for the time it is stored there. 30 days minimum is for S3 IA, 90 days minimum is for S3 Glacier and 180 days minimum for Glacier Deep Archive.

    The above questions appears in review/timed set 5.

    https://aws.amazon.com/s3/faqs/?nc=sn&loc=7

    Storage Example:

    Assume you store 100GB (107,374,182,400 bytes) of data in Amazon S3 Standard in your bucket for 15 days in March, and 100TB (109,951,162,777,600 bytes) of data in Amazon S3 Standard for the final 16 days in March.

    At the end of March, you would have the following usage in Byte-Hours: Total Byte-Hour usage = [107,374,182,400 bytes x 15 days x (24 hours / day)] + [109,951,162,777,600 bytes x 16 days x (24 hours / day)] = 42,259,901,212,262,400 Byte-Hours.

    Let’s convert this to GB-Months: 42,259,901,212,262,400 Byte-Hours / 1,073,741,824 bytes per GB / 744 hours per month = 52,900 GB-Months

    This usage volume crosses two different volume tiers. The monthly storage price is calculated below assuming the data is stored in the US East (Northern Virginia) Region: 50 TB Tier: 51,200 GB x $0.023 = $1,177.60 50 TB to 450 TB Tier: 1,700 GB x $0.022 = $37.40

    Total Storage Fee = $1,177.60 + $37.40 = $1,215.00

    The 30 days minimum is not applied to S3 standard. Please check and let me know.

  • Carlo-TutorialsDojo

    Administrator
    January 21, 2021 at 9:49 am

    Hello KBO,

    I’m sorry. I don’t quite follow you. This question is mainly about transitioning from the Standard class to Standard – IA, and Glacier.

    There is a minimum 30-day window for transition (different from the minimum 30-day storage charge) for Standard – IA.

    Refer to this link for more information.

    Let me know your thoughts.

    Regards,

    Carlo

  • KBO

    Member
    January 21, 2021 at 12:47 pm

    https://tutorialsdojo.com/amazon-s3/

    Check the list of S3 the minimum storage duration charge is N/A for Standard S3 but for others it is 30 days, 90 days, 180 days.

    • Carlo-TutorialsDojo

      Administrator
      January 21, 2021 at 1:18 pm

      Hello KBO,

      Again, please note that the minimum 30-day duration charge is different from the minimum 30-day for the transition.

      Regards,

      Carlo

      • KBO

        Member
        January 21, 2021 at 1:39 pm

        Hi Carlo,

        S3 Standard pricing does not tell the object needs to be in the bucket for minimum 30 days. https://aws.amazon.com/s3/faqs/#Billing

        Q: How much does Amazon S3 cost?

        With Amazon S3, you pay only for what you use. There is no minimum fee. You can estimate your monthly bill using the AWS Pricing Calculator.

        Q: How will I be charged and billed for my use of Amazon S3?

        The volume of storage billed in a month is based on the average storage used throughout the month. This includes all object data and metadata stored in buckets that you created under your AWS account. We measure your storage usage in “TimedStorage-ByteHrs,” which are added up at the end of the month to generate your monthly charges.

        Storage Example:

        Assume you store 100GB (107,374,182,400 bytes) of data in Amazon S3 Standard in your bucket for 15 days in March, and 100TB (109,951,162,777,600 bytes) of data in Amazon S3 Standard for the final 16 days in March.

        At the end of March, you would have the following usage in Byte-Hours: Total Byte-Hour usage = [107,374,182,400 bytes x 15 days x (24 hours / day)] + [109,951,162,777,600 bytes x 16 days x (24 hours / day)] = 42,259,901,212,262,400 Byte-Hours.

        Let’s convert this to GB-Months: 42,259,901,212,262,400 Byte-Hours / 1,073,741,824 bytes per GB / 744 hours per month = 52,900 GB-Months

        This usage volume crosses two different volume tiers. The monthly storage price is calculated below assuming the data is stored in the US East (Northern Virginia) Region: 50 TB Tier: 51,200 GB x $0.023 = $1,177.60 50 TB to 450 TB Tier: 1,700 GB x $0.022 = $37.40

        Total Storage Fee = $1,177.60 + $37.40 = $1,215.00

        • Carlo-TutorialsDojo

          Administrator
          January 21, 2021 at 1:53 pm

          Hello KBO,

          Again, this particular item does not have anything to do with S3 Standard pricing.

          It seems like you didn’t check the link that I provided you so here’s a screenshot:

          • Carlo-TutorialsDojo

            Administrator
            January 21, 2021 at 1:56 pm

            The concept behind “Minimum days for transition” is different from the “Minimum 30-Day storage charge”

            • Carlo-TutorialsDojo

              Administrator
              January 21, 2021 at 1:58 pm

              As the screenshot below shows, you’d have to wait for 30 days before you can transition to the Standard-IA tier.

            • KBO

              Member
              January 21, 2021 at 2:17 pm

              You mean if you store in S3 it will charge only for storage hours but if you want to transition to S3-IA, it requires minimum of 30 days in S3 Standard.

              • This reply was modified 3 years, 1 month ago by  KBO.
      • KBO

        Member
        January 21, 2021 at 2:11 pm

        Hi Carlo,
        Check this question

        A company plans to use a cloud storage service to temporarily store its log files. The number of files to be stored is still unknown, but it only needs to be kept for 12 hours.

        Which of the following is the most cost-effective storage class to use in this scenario?

        check the answer in Tutorial dojo for this question.

        The scenario requires you to select a cost-effective service that does not have a minimum storage duration since the data will only last for 12 hours. Among the options given, only Amazon S3 Standard has the feature of no minimum storage duration. It is also the most cost-effective storage service because you will only be charged for the last 12 hours, unlike in other storage classes where you will still be charged based on its respective storage duration (e.g. 30 days, 90 days, 180 days).

        S3 Standard-IA is designed for long-lived but infrequently accessed data that is retained for months or years. Data that is deleted from S3 Standard-IA within 30 days will still be charged for a full 30 days. S3 Intelligent-Tiering also has a minimum storage duration of 30 days, which means data that is deleted, overwritten, or transitioned to a different S3 Storage class before 30 days will incur the normal usage charge plus a pro-rated charge for the remainder of the 30-day minimum.

        S3 Glacier Deep Archive is designed for long-lived but rarely accessed data that is retained for 7-10 years or more. Objects that are archived to S3 Glacier Deep Archive have a minimum of 180 days of storage, and objects deleted before 180 days incur a pro-rated charge equal to the storage charge for the remaining days.

        Hence, the correct answer is: Amazon S3 Standard.

        Amazon S3 Standard-IA is incorrect because this storage class has a minimum storage duration of at least 30 days. Remember that the scenario requires the data to be kept for 12 hours only.

        Amazon S3 Intelligent-Tiering is incorrect. Although this is used for files that have unknown or unpredictable access patterns, just like S3 Standard-IA, this storage class has a minimum storage duration of at least 30 days.

        Amazon S3 Glacier Deep Archive is incorrect. Although it is the most cost-effective storage class among all other options, it has a minimum storage duration of at least 180 days which is only suitable for backup and data archival. If you store your data in Glacier Deep Archive for only 12 hours, you will still be charged for the full 180 days.

        References:

        https://docs.aws.amazon.com/AmazonS3/latest/dev/storage-class-intro.html

        https://aws.amazon.com/s3/storage-classes/

        Check out this Amazon S3 Cheat Sheet:

        Amazon S3

        S3 Standard vs S3 Standard-IA vs S3 One Zone-IA Cheat Sheet:

        S3 Standard vs S3 Standard-IA vs S3 One Zone-IA vs S3 Intelligent Tiering

        • This reply was modified 3 years, 1 month ago by  KBO.
      • KBO

        Member
        January 21, 2021 at 2:26 pm

        S3 Standard 30 days minimum to transition to S3-IA or Glacier
        S3 Standard does not charge minimum 30 days if you delete the object from the bucket.
        So if I copy the object and move it to IA from S3 and not transition it then it will be cost effective.
        Since there is a time constraint in transitioning objects in S3, you can only change the storage class of your objects from S3 Standard storage class to STANDARD_IA or ONEZONE_IA storage after 30 days. This limitation does not apply on INTELLIGENT_TIERING, GLACIER, and DEEP_ARCHIVE storage class.
        I got it,
        Thank you! Slight Smile

        • This reply was modified 3 years, 1 month ago by  KBO.
        • This reply was modified 3 years, 1 month ago by  KBO.
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