[Info-vax] Re; Spiralog, RMS Journaling (was Re: FREESPADRIFT)

[Johnny Billquist]

On 2016-06-29 12:04, lawrencedo99 at gmail.com wrote:
> On Wednesday, June 29, 2016 at 9:54:50 PM UTC+12, Johnny Billquist wrote:
>> On 2016-06-29 11:41, Lawrence D’Oliveiro wrote:
>>> How do you delete those directories?
>>
>> You are so hung up on cycles, for no good reason.
>>
>> The "worst" that happens is that you will have lost files.
>
> You don’t see that as a filesystem integrity problem?

Nope. Nothing is broken, nothing gets corrupted, nothing works wrong.

>> Lost files are nothing new. There is a directly called lost+found, where
>> fsck places such files when scanning.
>
> Have you noticed that, on modern Linux systems, fsck invocations don’t need to happen that often? Yet your proposal would require them to happen much more frequently, even without abnormal shutdowns? Namely, you now have to have them as a regular part of normal system operation?

Nothing bad happens if you do them more infrequently in this situation. 
You just have some files/directories that you deleted, whose space on 
the disk have not been reclaimed yet.

> In other words, do you realize you are requiring a filesystem garbage collector? Do you know that it is bad enough running them on RAM (as required by languages like Java and Lisp), running them on much slower persistent storage (even SSDs, never mind disks) would cause an unacceptable impact on performance?

So don't run them all the time. This file system integrity is not 
compromised by this.

	Johnny