Talk:Snapshot (computer storage)

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Unnamed section

I agree this article is a bit of a jumble and needs some structure :

Snapshot (general description i.e. point in time copy)
Types of
- Filesystem based (VSS etc)
- Hardware based (VM etc)
- Storage subsystem copy service (FlashCopy, point in time volume copy)

The contents of Disk snapshot should be merged in here. Thoughts Baz whyte 19:58, 29 July 2007 (UTC)[reply]

Shouldn't HAMMER, DragonFly's auto-snapshotting filesystem be mentioned? It's quite unique and has a few noticable differences from ZFS. --azior (talk) 13:45, 6 February 2009 (UTC)[reply]

Volume Managers

I removed this "Block-level snapshotting is almost always less space-efficient than direct file system support for snapshots." This seems irrelevant, unsubstantiated and incomparable. Please cite a valid reference if you re-add it. Ian Macintosh (talk) 16:13, 17 February 2012 (UTC)[reply]

This sentence: "In the highest, SERIALIZABLE, a snapshot is implicitly created at the start of every transaction." is incorrect. SS2PLL (used in MS SQL, for example) doesn't do it at all. More than that, you can't correctly implement SERIALIZABLE isolation level with snapshots alone (look up Serializable Snapshot Isolation on this Wiki). — Preceding unsigned comment added by 176.194.95.252 (talk) 16:42, 7 September 2014 (UTC)[reply]

WAFL

WAFL needs clarification - It is listed under 'File Systems', and the sentence even reads "Some file systems, such as WAFL...", however in the footnotes, it is stated that WAFL is not a file system... What is it? — Preceding unsigned comment added by 149.7.40.225 (talk) 10:50, 25 February 2019 (UTC)[reply]

Phantom OS

Please see my comment to the Talk page for the Phantom OS [[1]]

Rhkramer (talk) 12:44, 26 July 2020 (UTC)[reply]