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

[lawrencedo99 at gmail.com]

On Saturday, June 18, 2016 at 11:51:46 PM UTC+12, Paul Sture wrote:
> On 2016-06-18, Lawrence D’Oliveiro wrote:
> > On Saturday, June 18, 2016 at 8:56:38 PM UTC+12, Paul Sture wrote:
> >
> >> Rather useful when determining how much space is required for a
> >> Time Machine Backup, I imagine.
> >
> > Time Machine plays fast and loose with your filesystem integrity
> > (multiple hard links to directories), and you pay the price in
> > reliability
> >
> > <http://arstechnica.com/civis/viewtopic.php?t=1252811>.
> 
> Yes, I also went through problems with TM, but they appear to be fixed.
> 
> TM can be terribly slow in certain circumstances.  I take regular
> clone copies using other software.

The funny thing is, rsync can perform mirror backups with deduping of unchanged files, without messing around with filesystem integrity; why couldn’t Apple have done the same?

> >> cf VMS only storing the block sizes of files rather than the number of
> >> bytes; this can be problematic for utilities ported from a system which
> >> has an easy/cheap way to supply the exact size in bytes.
> >
> > This was the example Linus Torvalds gave of why he hated VMS...
> 
> Eh?  There are many reasons to dislike an OS but 'hating VMS' for that
> *perceived* problem?  Really?

A real problem. And yes, I saw his point.

> From another perspective, I ran straight into the spat between Torvalds
> and Ted Ts'o when ext4 became the default on Ubuntu - this one did
> produce data loss for me (until I worked out what was going on):
> 
> "Linus Torvalds Upset over Ext3 and Ext4"
> 
> <http://www.linux-magazine.com/Online/News/Linus-Torvalds-Upset-over-Ext3-and-Ext4>

That seemed to be a matter of default settings. You could change the options at mount time to prioritize what you wanted.