New Amazon S3 Storage Class – Glacier Deep Archive
aws.amazon.com
aws.amazon.com
Reading between the lines, I wonder if they're really trying to just deprecate the Glacier API, and move to Glacier being a different storage tier in S3. Which is probably what it should have been in the first place. AWS will likely never actually retire the Glacier API (much like SimpleDB has never actually been retired), it'll just hang on, not receiving new features.
I am almost certain they are playing catchup here, given that GCP had this feature for ever ("coldline" storage class), last time I checked it was more expensive though.
Glacier here seems to be dropping out an even cheaper option than they had before, provided you're happier with even longer retrieval times. Which for my purposes is perfectly fine.
[1] https://help.backblaze.com/hc/en-us/articles/217664898-What-...
B2 is 400% more expensive than Deep Archive. Whether the lower transfer costs result in savings depends on your use case. For B2 the cost of transfer is 5x a month of storage, for Deep Archive it’s 90x.
GCS is also cheaper than S3, with even higher transfer costs, but instant access irrespective of storage class.
https://aws.amazon.com/blogs/aws/aws-storage-update-s3-glaci...
I do indeed use B2 for my personal Linux backups
If my math is correct, for N. California, 100 TB in Deep Archive is $204.80 per month, vs. $512 per month in regular Glacier.
For other non-Gov US regions, 100 TB in Deep Archive is $101.376 per month, vs. $409.60 per month in regular Glacier.
[Edit: Addl. pricing info]
But that only accounts for the cost of retrieving it within AWS. If you want to download the data to your own server, you have to pay the internet egress rate which would add an additional $7,800.
They realized that was a mistake and significantly streamlined the pricing, and with this Deep product it doesn't look like they've even supporting the original somewhat opaque Glacier API, just S3.
If you're patient and can wait 48 hours for data, bulk storage retrieval is cheap at $0.0025/GB and $0.025 per 1000 requests. The standard AWS $0.09/GB egress is the really big cost, but if you have enough data you can mitigate that with a Snowball. Not a big issue if you're recovering from a catastrophe that destroyed all your local backups, it looks great as insurance for those of us with modest time to recovery desires.
The only way to get close to that would be to have some insanely complicated automated jukebox/storage mechanism, because you'd be relying on essentially piling up disks in a rack.
Just rough back-of-napkin figures: blu-ray is 4.75" in diameter, and 0.05" in depth. 42U racks: 78″ x 42" x 24″ (more or less.)
Assuming you just pack them all in, in great big tall piles: You could get 5 x 8 columns, 1560 discs deep.
5 * 8 = 40. 40 x 1560 = 62,400 discs in a rack. At 150Gb a disc, that's a total of 9,360,000gb (9.36pb).
Of course you probably need to cut that in half at the very least, to be able to provide some kind of mechanism for extracting and remove the discs, and for safe storage. I'd consider that generous, but it's a good figure to work from.
And of course you have to consider that any jukebox for doing the writing / retrieval is effectively wasted space. The amount of discs you could have stored in transit there aren't likely to be sufficient enough to worth bothering with, so at the very least halve it again. That's also assuming you'd have one jukebox per storage rack.
So... 9.36 / 2 / 2 = 2.34 petabytes average rack density.
Current backblaze PODs come in at https://www.backblaze.com/blog/open-source-data-storage-serv... 480 TB per 4U. Rack I used for disc storage is the standard 42U. I'm going to go assume you'd lose 6U for top of rack switches, power, etc. so 9 servers per 42U. 9 * 480tb = 4.32 petabytes.
So even just with Backblaze PODs you'd get more than double the data density, and it would all be on-line and retrievals could be nearly instantaneous. Plus you'd be dealing with tried and true technology that is likely to be way more reliable and have much less unknowns, comprising of fairly easy to replace storage media, vs relatively new technology with less certain supply lines and specialised devices associated with it.
edit: I see below that bluray archive disks are reaching 150gb per side, so 300gb total. So the rack data density probably reaches 4.68 petabytes, just slightly over that of the hard disks, but still my final point remains. Choosing a newer technology vs well known hard disks and supply chains would be crazy, unless there was a strong advantage that it supplied. I don't see 0.36pb per rack as being that significant an advantage.