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bluedoggiant

macrumors 68030
Original poster
Jul 13, 2007
2,544
23
MD & ATL,GA
Hey guys, have a rMBP 2013 15" and I have this app running on it. It seems really glitched up compared to before when it first came out and I feel like its not doing much on my Mavericks system. Is this app really worth it or doing anything? Thanks.
 

foobarbaz

macrumors 6502a
Nov 29, 2007
859
1,911
I still have an old license and I thought about installing it again as I'm running low on space. But the fact that it hasn't been updated since October 2013 gave me pause and I found this thread after googling. I guess I won't even bother ...
 

bluedoggiant

macrumors 68030
Original poster
Jul 13, 2007
2,544
23
MD & ATL,GA
I still have an old license and I thought about installing it again as I'm running low on space. But the fact that it hasn't been updated since October 2013 gave me pause and I found this thread after googling. I guess I won't even bother ...

Funny lol.

The app seems sort of buggy and it is claiming that it is saving 27.5GB of space on my computer but I cannot be so sure.

I say you should try it out and see if it actually saves any space.

I wish more people would give input.
 

grahamperrin

macrumors 601
Jun 8, 2007
4,942
648
The software works as expected on Mavericks.

On El Capitan today it was necessary to open
/Library/PreferencePanes/Clusters.prefPane/Contents/Resources/
and then use Finder's contextual menu to open ClustersHelper.

First attempts to retrieve a key (in response to entry of a registration code) failed. I sought advice, Google led me to this topic. Eventually I worked around the key retrieveal issue by simply quitting then reopening System Preferences.

seems sort of buggy

I was aware of only one significant bug – in HFS Plus, over which LateNiteSoft has no control. Probably the best way to avoid that bug:
  • ensure that there's always enough free space for an uncompressed copy of the largest file that is to be compressed.
For fun, I'm now aggressively compressing the data on my Mavericks startup volume whilst booted from a different volume.
 
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bluedoggiant

macrumors 68030
Original poster
Jul 13, 2007
2,544
23
MD & ATL,GA
The software works as expected on Mavericks.

On El Capitan today it was necessary to open
/Library/PreferencePanes/Clusters.prefPane/Contents/Resources/
and then use Finder's contextual menu to open ClustersHelper.

First attempts to retrieve a key (in response to entry of a registration code) failed. I sought advice, Google led me to this topic. Eventually I worked around the key retrieveal issue by simply quitting then reopening System Preferences.



I was aware of only one significant bug – in HFS Plus, over which LateNiteSoft has no control. Probably the best way to avoid that bug:
  • ensure that there's always enough free space for an uncompressed copy of the largest file that is to be compressed.
For fun, I'm now aggressively compressing the data on my Mavericks startup volume whilst booted from a different volume.
This is so interesting. How do you understand the technology behind the application. If it is such a must, why aren't there other Mac applications claiming to do the same thing? I deleted the app because it was a hog on the CPU processes and was unsure if it was actually doing anything.

The other app LNS makes XSlimmer is great but hasn't been updated in years. I suspect the founder has moved on. I am not so keen on using abandoned software.
 

grahamperrin

macrumors 601
Jun 8, 2007
4,942
648
… How do you understand the technology behind the application…

http://arstechnica.com/apple/2009/08/mac-os-x-10-6/3/ was a good introduction.

AppleFSCompression is mentioned in open source areas such as
https://opensource.apple.com/source/kext_tools/kext_tools-326.1.12/systempaths.plist and there was reference to a private framework –
/System/Library/PrivateFrameworks/AppleFSCompression.framework – but there's no comparable systempaths.plist at https://opensource.apple.com/source/kext_tools/kext_tools-426.20.2/ for OS X 10.11.2 … I can't guess whether that framework is still private.

why aren't there other Mac applications claiming to do the same thing? …

There was another third party product, I don't recall its name. When I compared the two, Clusters was much better.
 

grahamperrin

macrumors 601
Jun 8, 2007
4,942
648
I expect developers (not necessarily LateNiteSoft) to focus on something more suitable than HFS compression.
 

grahamperrin

macrumors 601
Jun 8, 2007
4,942
648
Simply: I expect that there'll be something more suitable.

With HFS Plus, AppleFSCompression could be pushed in a way that led to silent dataloss of hundreds of MB from a file, with the consequent file system inconsistency non-detectable by fsck_hfs(8), then after the inconsistent file system was apparently OK there would be, for the wrecked file, an error code that was widely non-understood or misunderstood. I might have written about it somewhere on the Internet.

That's not to be alarmist about use of AppleFSCompression with APFS. I haven't even looked at the combination, let alone pushed it.
 

grahamperrin

macrumors 601
Jun 8, 2007
4,942
648
There was no AFPS at the time ;-) and re: post 4 above IIRC the loss was whilst using Clusters.
 

msephton

macrumors 6502
Jan 6, 2004
452
195
United Kingdom, Europe
I've put together a shell script of my own using:
  1. the latest afsctool
  2. find
  3. cron
Which effectively reproduces what I used Clusters for. Happy!
 
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mcbeavens

macrumors newbie
Feb 12, 2018
4
3
I've put together a shell script of my own using:
  1. the latest parallel processing version of afsctool
  2. find
  3. cron
Which effectively reproduces what I used Clusters for. Happy!

This is awesome to read! I hope you see this, and could possibly help. I didn't know how popular Clusters was since it seems to be hard to find any information about it online outside of the developers site which states that Clusters has been discontinued, and it no longer works with High Sierra. I have been using it since Snow Leopard. Could you elaborate a little on how you did this? I would love to get something working. Clusters is a huge staple of an app I have been using, and I just upgraded to High Sierra. How did you get something working?
 

mcbeavens

macrumors newbie
Feb 12, 2018
4
3
This is awesome to hear! Thanks for the response! Yeah, I will post a couple screens as soon as I get a moment. Really quick question, if I use afsctool to compress some files when I go to open them, will macOS automatically decompress them like with clusters? Say I compressed an application, when I open it, will it work without issues?


I'm working on an app to make my solution a direct replacement to clusters. Please hold on for a little while longer!
 
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