On Oct 14, 2015, at 13:42 , Dave Horsfall wrote:
> On Sun, 11 Oct 2015, Justin C. Walker wrote:
>
>>> Unix[tm] has been doing that for years (ISTR that it was even in
>>> Edition 5); has Apple only just caught up?
>>
>> The disk/paging/FS code is far beyond what Edition 5 (or System 5) was
>>
On Sun, 11 Oct 2015, Justin C. Walker wrote:
> > Unix[tm] has been doing that for years (ISTR that it was even in
> > Edition 5); has Apple only just caught up?
>
> The disk/paging/FS code is far beyond what Edition 5 (or System 5) was
> doing. For sure, they did try to stream back then, but t
On Sun, Oct 11, 2015 at 11:57 PM, Michael David Crawford <
mdcrawf...@gmail.com> wrote:
> In principle a highly fragmented disk has less payload capacity, and
> will be slower to access because of all the indirect blocks.
>
If the file is that large, it'll have indirect blocks anyway. I don't kno
In principle a highly fragmented disk has less payload capacity, and
will be slower to access because of all the indirect blocks.
I don't know whether that makes a real-world difference.
Michael David Crawford P.E., Consulting Process Architect
mdcrawf...@gmail.com
http://mike.soggywizard.com/
> On 12 Oct 2015, at 3:00 am, macports-users-requ...@lists.macosforge.org wrote:
>
>> random access time for a SSD is 1-3 orders of magnitude less than for a
>> rotational drive.
>>
>> As with anything, you need to measure ?real world use? to be certain, but
>> it?s probably not an issue for S
On Oct 11, 2015, at 06:59 , Dave Horsfall wrote:
> On Sat, 10 Oct 2015, Justin C. Walker wrote:
>
>> Also, OS X in recent incarnations does a pretty good job of detecting
>> when you are streaming a file and doing a lot of prefetching.
>
> Unix[tm] has been doing that for years (ISTR that it w
On Sat, 10 Oct 2015, Justin C. Walker wrote:
> Also, OS X in recent incarnations does a pretty good job of detecting
> when you are streaming a file and doing a lot of prefetching.
Unix[tm] has been doing that for years (ISTR that it was even in Edition
5); has Apple only just caught up?
--
D
On Sat, 10 Oct 2015, René J.V. Bertin wrote:
> I'm not expecting it to be in real world usage, of course. OTOH,
> frequent defragmenting is probably not a good idea on SSDs.
The only correct way to use an SSD is as part of a RAID; when (not if) one
fails, you pull the thing, replace it, and reb
> On 11 Oct 2015, at 3:00 am, macports-users-requ...@lists.macosforge.org wrote:
>
> Anyone on here who is knowledgeable about disk (free space) fragmentation
> (not just opinionated ;)) ?
>
> HFS+ is supposed to contain algorithms that limit file fragmentation, but
> without a background proc
On Oct 10, 2015, at 12:06 , René J.V. Bertin wrote:
> On Saturday October 10 2015 14:45:43 Daniel J. Luke wrote:
>
>> random access time for a SSD is 1-3 orders of magnitude less than for a
>> rotational drive.
>>
>> As with anything, you need to measure ‘real world use’ to be certain, but
>>
Hi
> On 10 Oct 2015, at 7:45 p.m., Daniel J. Luke wrote:
>
>> On Oct 10, 2015, at 7:28 AM, René J.V. Bertin wrote:
>> HFS+ is supposed to contain algorithms that limit file fragmentation, but
>> without a background process that moves files (or file blocks), it cannot
>> prevent free space fr
On Sat, Oct 10, 2015 at 2:45 PM, Daniel J. Luke wrote:
> On Oct 10, 2015, at 7:28 AM, René J.V. Bertin wrote:
> > HFS+ is supposed to contain algorithms that limit file fragmentation,
> but without a background process that moves files (or file blocks), it
> cannot prevent free space fragmentati
On Saturday October 10 2015 14:45:43 Daniel J. Luke wrote:
> random access time for a SSD is 1-3 orders of magnitude less than for a
> rotational drive.
>
> As with anything, you need to measure ‘real world use’ to be certain, but
> it’s probably not an issue for SSDs at all.
I'm not expecting
On Oct 10, 2015, at 7:28 AM, René J.V. Bertin wrote:
> HFS+ is supposed to contain algorithms that limit file fragmentation, but
> without a background process that moves files (or file blocks), it cannot
> prevent free space fragmentation, just limit it. On a spinning disks that can
> become a
Hey
Anyone on here who is knowledgeable about disk (free space) fragmentation (not
just opinionated ;)) ?
HFS+ is supposed to contain algorithms that limit file fragmentation, but
without a background process that moves files (or file blocks), it cannot
prevent free space fragmentation, just l
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