Mailinglist Archive: opensuse (878 mails)

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Re: [opensuse] Another example of deliberate systemð supporters deliberately sabotaging previously working software...
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В Mon, 3 Aug 2015 16:48:24 +0200
"Carlos E. R." <robin.listas@xxxxxxxxxxxxxx> пишет:

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On 2015-08-03 16:44, Anton Aylward wrote:
On 08/03/2015 10:36 AM, Carlos E. R. wrote:
Can't that do snapshots like BtrFS, like ext4?
No, or not currently. Actually, XFS shares some devs and features
with btrfs.

I recall reading that XFS could do snapshots but required (a) not
to mount via uuid and (b) a "freeze" option. I also recall that
the freeze option became kernel sported and could even be used with
ext3, but I don't recall where I read that.

The name is the same, but the feature is distinctly different.

The purpose is to create a backup of the filesystem into a different
device. It is not a COW (copy on write).


Actually it is exactly what CoW is. It is btrfs which is not CoW - more
appropriate name is "redirect on write" or "write anywhere" (which is
how oldest implementation is called).

There is no "copy" involved in btrfs write process.
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