5 ms·
Hyperspace
- steveharman 2mo agoBy comparison, have to handle it to DeDupe for its transparency: Key Features Free to Scan, Unlock to Deduplicate
- markn951 2mo agoI think the record for most space saved by this utility in a single run is in the hundreds of TBs now. I’ll see if I can find the toot. Edit: maybe a bit hyperbolic of me, looks like it was 3.94TB https://mastodon.social/@WTL/116710030179809319 https://mastodon.social/@WTL/116710030179809319
- mrtesthah 2mo agoHow does it compare to https://diskdedupe.com/ https://diskdedupe.com/?
- steve_taylor 2mo agoHow does this compare to diskDedupe, which has been around longer and is much cheaper?
- nodesocket 2mo agoSeems useful for s3 buckets. I suppose a script that watches for new objects, calculates its sha256 and stores that in a DB, then checks for duplicate hashes would be a fairly trivial task. Though s3 doesn’t support symbolic links so accounting would need to be handled by server side code.
- dmarinus 2mo agoI don't think it's very useful but there's already a checksum in the meta data of an S3 object: https://docs.aws.amazon.com/AmazonS3/latest/API/API_Object.html https://docs.aws.amazon.com/AmazonS3/latest/API/API_Object.h... It might be better to keep an index of paths to checksums and use the checksum as object key in S3. I'm not sure what you like to achieve but if you use restic with S3 as a backend you can achieve much better deduplicate and compression.
- AceJohnny2 2mo agoWhile the idea of data-deduplication does apply everywhere, this specifically depends on the APFS CoW data feature, so it's not applicable outside of macOS (or APFS Volumes)
- rbanffy 2mo agoThe same concepts exist in ZFS, BtrFS and, IIRC, XFS.
- rf15 2mo agoalso, worst case you can do this with link features? Which is basically every system under the sun.
- msh 2mo agobut link is dangerous, as a edit made to one file will then be made to all copies. For example, If I have two files /home/m/todo.txt and /home/m/backup2025/todo.txt that are identical and you then replace /home/m/todo.txt with a link to /home/m/backup2025/todo.txt and I later edit /home/m/todo.txt then backup copy would also be updated. With apfs clones the backup would not be modified when I updated the file.
- rbanffy 2mo agoLink might be desirable for your e-book or mp3 collections. Or .iso images, MAME ROMs, and other files that are unlikely to be changed.
- AceJohnny2 2mo agoLinks are not CoW
- oersted 2mo agoIt's quite the dark-pattern to allow you to download it and scan for free, without any clear indication that it's a paid product, and then ambush you with a purchase dangling the space savings in front of your face.
- guywithabike 2mo agoIf anything, it's the opposite of a dark pattern: you get to see if it'll provide any value for you without paying a dime. It's a far better proposition than paying up only to find out that it won't free up any space for you. The linked site is very clear about how the pricing works.
- sssilver 2mo agoThis would only be true if it didn't take your time before asking you to pay to not waste the time that it took.
- alsetmusic 2mo agoThe app store identifies apps with paid features. You shouldn't be entirely surprised.
- Analemma_ 2mo agoYou are complaining that it can’t instantaneously perform a complete scan of your disk, and then attributing malicious intent to this lack of magic instant scanning technology. What are we even doing here. The knee-jerk conspiratorial foolishness on this site is completely off the deep end.
- sssilver 2mo agoNo, I'm complaining that it doesn't ask me to pay before it takes my time to perform a complete scan of my disk (ideally before it even gives me a download of the app). We both know it does so intentionally, and we also know exactly what the intent is.
- starkshift 2mo agoNice I was just thinking about this the other day! Given the memory supply issue today, I wonder how much of data in our data centers worldwide is essentially just copied data? I have a feeling that there is a ton of redundancy, much of it absolutely necessary, but much of it essentially not at all, and howmuc memory we can reclaim by culling copies
- system2 2mo agoAre you deleting the others and creating a symlink to the original? How does this work exactly? I didn't get it from the FAQ section. Does this mean that if the original is gone, all the file links will not be found?
- ianmurrays 2mo agoHere’s a lengthier explanation [1] but it’s basically an APFS feature. [1]: https://hypercritical.co/hyperspace/#how-it-works https://hypercritical.co/hyperspace/#how-it-works
- system2 2mo agoThank you. This makes sense now.
- _diyar 2mo agoNo, this uses a feature of the macOS file system. From the FAQ: > Q: Are clone files the same thing as symbolic links or hard links? > A: No. Symbolic links (“symlinks”) and hard links are ways to make two entries in the file system that share the same data. This might sound like the same thing as the space-saving clones used by Hyperspace, but there’s one important difference. With symlinks and hard links, a change to one of the files affects all the files. > The space-saving clones made by Hyperspace are different. Changes to one clone file do not affect other files. Cloned files should look and behave exactly the same as they did before they were converted into clones.
- deathanatos 2mo agoIt's a CoW (copy-on-write) file, it sounds like.
- KingMob 2mo agoYes, but it sounds like it's more fine-grained than just the file-level. So even if you change part of one copy, the remaining unchanged subpieces are still shared, iiuc.
- a_t48 2mo agoThis uses reflinks, right? I've been experimenting with using reflinks under Linux to speed up layer extraction for Docker, it's great.
- odo1242 2mo agoYep
- frizlab 2mo agoIt uses APFS clones
- gehsty 2mo agoDing ding ding…
- a_t48 2mo agoStruggling to find the effective difference between the two, other than it being Apple specific. Either way, neat - I can hopefully use this to provide faster layer unpacks on MacOS as well.
- frizlab 2mo agoYup that’s pretty much it, reflinks is Btrfs/XFS, clones is APFS, but the concept is the same (CoW in both cases).
- deleted 2mo ago[deleted]
- anilakar 2mo agoFor Windows users looking to save space, there's Compactor[1] that uses the NTFS built-in compression opportunistically for only those files that benefit from it. It is not a deduplicator but the basic idea is the same: take an underutilized OS feature and make it usable. Pretty handy when your flight sim game takes 1.2 terabytes with most of that being sparse terrain mesh data and uncompressed textures. Compressing the whole directory would take over a day according to Microsoft and their infamous progress bar; Compactor gets it done in fifteen minutes. [1] https://github.com/Freaky/Compactor https://github.com/Freaky/Compactor
- teiferer 2mo agoIt's amazing that this is a product. In an earlier job we used to ask how to do this (discovery phase of deduplication) in the first interview screening. Once you have that list, it's straightforward to make a few syscalls that make it happen.
- underyx 2mo agoWhat are they gonna think of next, productizing something as trivial as FTP?
- sunrunner 2mo ago> Two kinds of purchases are possible: one-time purchases and subscriptions. I’m surprised they’re not charging on a $/GB saved model.
- mceachen 2mo agoIf you're referencing Fetch for mac (pre macos) or Transit by Panic (later renamed to Transmit), I was a fan (and I've been a terminal fanboy since the early 80s). Both of them started as FTP wrappers, and both provided convenience the cli lacked.
- archagon 2mo agoAs I recall, there are nuances around certain types of files that require expert attention, such as links, files inside frameworks/packages, and unmaterialized iCloud Drive files.
- dostick 2mo agoSurprised that app with Full Disk Access permission requirement is allowed to the App Store.
- rtolsma 2mo agoi asked claude to make this and in 15min had a working replica CLI
- odo1242 2mo agoOr use jdupes
- rbanffy 2mo agoI’ve been using fdupes. It’s installable from MacPorts. Or is it finddupes? I don’t quite remember.
- deleted 2mo ago[deleted]
- rf15 2mo agoProbably very simple for claude, considering how many implementations of this simple concept already exist and are part of the training data.
- yankcrime 2mo ago[dead]
- hexo 2mo agolook ma, antibackup!
- TomMasz 2mo agoThis could be useful for reclaiming space when your disk is almost full, but $9.99 a month for a tool the average person isn't going to need very often seems a bit much.
- sgerenser 2mo agoIt’s not really intended to be a recurring $9.99/mo. It’s $9.99, and that gives you a month of usage. But the expectation is you use it once or twice, then you’re done for a long time. But apparently they also offer an auto-renew subscription for that same price, which seems like a strange choice.
- lode 2mo agoDiscussed upon release at: https://news.ycombinator.com/item?id=43173462 https://news.ycombinator.com/item?id=43173462 You can also use the free fclones CLI tool that uses the same native APFS functionality: https://news.ycombinator.com/item?id=43173713 https://news.ycombinator.com/item?id=43173713