Re: [Gnu-arch-users] planning 2.0? (was re: Google...)

[Matteo Settenvini]

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Aldrik KLEBER wrote:
>>      ~ provides ACID properties to multiple users of a single database
>>         node
> 
>       Excuse me for my ignorance but .... What do you call ACID properties ?
> 
> 

If I recall correctly, it's an acronym that stands for "Atomicity,
Consistency, Isolation, Durability".

It's a useful set of properties of many DBMSes (like Oracle, for
example), in which you have atomic transactions that can be rolled back
if aren't executed until the end correctly; transactions don't get one
in each other's way, and once a transaction has been done, it cannot be
deleted from history (logs always remain), and this protects you also
against system failures (because logs can be replayed).

The main goal is to ensure data integrity, among other things.
I guess journaled filesystems also borrowed the idea.

Regards,
- --
Matteo Settenvini
FSF Associated Member
Email : address@hidden


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