Hi there my friends!!
Can you help understanding the calculator? It doesnt seem to me it has taken into consideration real physical backup servers linux hardened immutable servers and all.
There is lots of terminology and calculations for S3 and Object-Storage servers, not so many for real physical linux hardened immutable repo.
Also I feel it kinda misleading. Let’s see:
>I have forward incremental backup chain with full on sundays and I have 7 days immutability.
>For the immutability to be ACTUALLY REAL I understand I should have 14 days immutability.
>Otherwise when I get to day 8, I have the full from yesterday, and I have the original full I did.
>Hacker gets into repo pwns the box, messes, modifies, destroys my original full.
>All week lost also yesterdays backup because it depended on the previous chain.
I understand that your documentation says that the immutability locks will be automatically applied to the whole chain, however, thats not what your calculator says:
Then, too sad :( no backup for 29 and 30 cause incremental depended on that
If no backup for 29-30 > then NO REAL IMMUTABILITY till day 30
Which is it? Please clarify calculator
Also guys, block generation period. Hard to understand if that should apply to my scenario or not, or what it even is at all.
Cannot be disabled, always showing 10 minimum. Click on the documentation link send you to Object Storage.
Also I set dailies to 60, why am I getting it up to the 70 daily??
If you are wondering, maybe is because of the monthlies? Then again, it could “go to” 70, but then, you have no reason to retain 69 or 68 either
In this scenario I could let go of backups 64 to 70 actually if I only need up to M2 to keep that chain to the day 60.
The problem I suspect is here, you are mixing up backups M2 and D70 like if one depended on the other or something.
I hope you can help out and understand my questions. It does seem theres some things to fix up and improve here. Like If i got some of this wrong or misunderstood, you can still work on the understanding of it.
EDIT: Also, why do the Fulls, show some GREY data??
Isnt it Full? are you telling me it is synthetic full? What is that? Why is that there? Why is it not explained? Whats different on day 70 that it doesnt have the grey data?
Lots of questions unanswered by this calculator….
Last comment: I saw this forum response. Seems to imply, or I read it as, “to calculate for Synthetic Backups, you must click ReFS/XFS because thats the thing that allows it”. Well it could have been more useful if there aws a little something clarifyin that. Or it could have been more useful, if the calculator allowed for selecting these abstract categories (synthetic, reversed, forward, incremental etc) parameters, and THEN tell you what you need to do to have it.