Hi I am planning to move to AWS S3 to store files. Though I been through the S3 FAQs but still I want to be sure about few more things specifically about S3 mentioned below -
1.How S3 recovers the data if some bucket is lost ? Does it keep the data back-up as well ?
2.Though my application will not be using S3 exhaustively, but how about if S3 gets down(availability issues handling by S3) ?
Thanks.
If you want your data to retain at most, you can enable versioning and cross version replicate so you have higher chance to get to your data even if a zone gets down. You can refer to this blog post https://aws.amazon.com/blogs/aws/new-cross-region-replication-for-amazon-s3/ for more information about this feature
you can refer to https://aws.amazon.com/s3/sla/ about SLA consideration
Related
I'm currently using AWS S3 and S3 glacier storage service through HyperBackup and Glacier Backup in NAS.
While using, I've got a few questions related to the pricing.
When downloading the files in the storage, which price will be applied?
Would that be "Get object (request)" or "Data Transfer"?
I've read this documentation about AWS (Downloading an object: https://docs.aws.amazon.com/AmazonS3/latest/userguide/download-objects.html). According to document, it seems like I can download objects through GET request, but it also says data transfer fees will be applied. I'm quite confused in this part since request and data transfer have quite different pricing range.
Please advise. Thank you.
Data Transfer will apply for any data that moves from the AWS Cloud to the Internet, regardless of whether it comes from S3, Glacier, EC2, etc.
The service-specific pricing will also apply for the functionality you are using.
Please note that there is a difference between the 'old' Amazon Glacier (which uses Vaults) and the 'Glacier' storage classes used in Amazon S3 (which uses standard S3 but stores the data differently and at a different price).
My AWS S3 costs have been going up pretty quickly for usage type "DataTransfer-Out-Bytes". I have thousands of images in this one bucket and I can't seem to find a way to drill down into the bucket to see which individual bucket items might be causing the increase. Is there a way to see which individual files are attributing to the higher data transfer cost?
Use Cloudfront if you can - its cheaper(if you properly set your cache headers!) than directly hosting from S3 and Cloudfront includes a popular objects report - which would answer your question.
If your using S3 alone you need to enable logging on the bucket (more storage cost) and then crunch the data in the logs (more data transfer cost) to get your answer. You can use AWS Athena to process the s3 access logs or use unix command line tools like grep/wc/uniq/cut to operate on the log files locally/from a server to find the culprits.
Still confused about storage-class 'Glacier' use by S3 and S3-Glacier' service.
What's their difference and how about their upload and retrieve?
See a example question below.
You’re researching third-party backup solutions to backup 10 TB of data nightly to Amazon S3. File restores won’t be needed often, but when they are, they’ll need to be available in under five minutes. Your analysis shows that you will exceed your budget for backup storage and you need to find a way to reduce the estimated monthly costs. How should you modify the solution to achieve the cost reduction needed?
Create an S3 lifecycle rule to move the data immediately to Amazon
S3 Glacier
Choose a third-party backup solution that writes directly to the
Amazon S3 Glacier API
Choose a third-party backup solution that leverages AWS Storage
Gateway to write data to Amazon S3 Glacier.
Why option 2 is correct and how about option 1 and option 3? Thanks
Glaicer is a storage class under the S3 service. Glacier is used for archiving data. Glacier and Glacier Deep Archive have a longer retrival time than the other S3 storage tiers (Standard, Standard-IA, One Zone-IA), but also cost significantly cheaper.
This looks like a certification question, CSA - Associate, maybe? You may have forgotten to provide the fourth answer choice.
You cannot move data to Glacier immediately using a lifecycle policy. You can set it to 0 days but it still takes time to make the move.
You do not need third party software to write to the AWS APIs, you can use the CLI and SDKS
This maybe the answer because, using a third-party piece of software that is able to take care of some of the overhead involved in getting a Storage Gateway File Gateway up and running, and configured to store data to Glacier or Glacier Deep Archive is easier.
Typically, "third-party" is not the answer in certification exam questions.
We have daily database backups created and stored on a server. In order to free up space, it was decided that all the backups older than 30 days should be archived using AWS Glacier.
So far so good, I managed to write a PowerShell script to select the required files and upload them to Glacier, but since I am new to all the AWS stuff, I have one question: is it possible to check that the files I have uploaded are indeed in the archive and that there has been no information loss?
My first approach was to send job retrieval requests for all the files that we have uploaded, and 4 hours later compare the checksums and archive ids of our original files and the ones we retrieved from Glacier. However, I think this process takes long, costs extra money, and most importantly, makes no sense at all..
I have also found that I can use inventory retrieval, but as far as I can tell this approach would be very similar to the one described above, just without downloading all the files again.
Lastly, is there even a point to trying to ensure that a file upload was successful if there are no errors? My vague understanding is that AWS would come back with error messages should an upload to Glacier fail, and it computes checksums internally during uploads.
I know that StackOverflow has seen more precisely worded questions, but any clarification regarding this would be immensely appreciated.
You have to try pretty hard to upload a corrupt file to Glacier, because Glacier requires checksums sent with each API request, and will reject the uploads if they don't match the hashes. Obviously you need to spot check your archives, but each one does not need to be downloaded and verified because of the built-in protections.
See Computing Checksums in the Amazon S3 Glacier Developer Guide for descriptions of how this works, on the wire.
Then, consider not using Glacier at all... not directly, anyway. Use S3, and upload your files using the GLACIER or DEEP_ARCHIVE storage class. Or upload them as Standard, with a lifecycle policy that moves them into one of the archive storage classes after 1 day. (Useful because if you delete Glacier or Deep Archive uploads before the minimum storage time, you're billed for the entire minimum time... this way you have a 24 hour "oops I don't like the way I set this up" window, since Standard storage has no minimum storage time period).
Using S3 is a far better solution, because S3 has a much better API and console, but the pricing is identical, because S3 is actually using Glacier as its backend, while you have the advantage of S3 as the frontend. Glacier has essentially no console functionality, is very opaque, and is not really designed for human interaction -- Glacier appears to have been designed as a backing store for an archiving system or service, which is exactly how S3 uses Glacier.
Amazon Simple Storage Service (Amazon S3) supports lifecycle configuration on an S3 bucket, which enables you to transition objects to the Amazon S3 GLACIER storage class for archival. When you transition Amazon S3 objects to the GLACIER storage class, Amazon S3 internally uses Glacier for durable storage at lower cost. Although the objects are stored in Glacier, they remain Amazon S3 objects that you manage in Amazon S3, and you cannot access them directly through Glacier.
https://docs.aws.amazon.com/amazonglacier/latest/dev/introduction.html
It is confusing and unfortunate that AWS recently confused this issue by dumbing things down, rebranding "Glacier" as "S3 Glacier," as if they were the same thing, when they are two very different services, one of which operates in a mode that gives you a gateway to the other. It's similarly unfortunate how Glacier has traditionally been marketed. Without S3 in front, Glacier is not well suited for very many applications.
I am working on an app which uses S3 to store important documents. These documents need to be backed up on a daily, weekly rotation basis much like how database backups are maintained.
Does S3 support a feature where a bucket can be backup up into multiple buckets periodically or perhaps in Amazon Glacier. I want to avoid using an external service as much as possible, and was hoping S3 had some mechanism to do this, as its a common usecase.
Any help would be appreciated.
Quote from Amazon S3 FAQ about durability:
Amazon S3 is designed to provide 99.999999999% durability of objects over a given year. This durability level corresponds to an average annual expected loss of 0.000000001% of objects. For example, if you store 10,000 objects with Amazon S3, you can on average expect to incur a loss of a single object once every 10,000,000 years
These numbers mean, first of all, that they are almost unbeatable. In other words, your data is safe in Amazon S3.
Thus, the only reason why you would need to backup your data objects is to prevent their accidental loss (by your own mistake). To solve this problem Amazon S3 enables versioning of S3 objects. Enable this feature on your S3 bucket and you're safe.
ps. Actually, there is one more possible reason - cost optimization. Amazon Glacier is cheaper than S3. I would recommend to use AWS Data Pipeline to move S3 data to Glacier routinely.
Regarding Glacier, you can make settings on your bucket to backup (old) s3 data to glaciaer if it is older than specified duration. This can save you cost if you want infrequently accessed data to be archived.
In s3 bucket there are lifecycle rules using which we can automatically move data from s3 to glaciers.
but if you want to access these important documents frequently from backup then you can also use another S3 bucket for backup your data.This backup can be scheduled using AWS datapipeline daily,weekly etc.
*Glaciers are cheaper than S3 as data is stored in compressed format in galaciers.
I created a Windows application that will allow you to schedule S3 bucket backups. You can create three kinds of backups: Cumulative, Synchronized and Snapshots. You can also include or exclude root level folders and files from your backups. You can try it free with no registration at https://www.bucketbacker.com