how do versioning filesystems take snapshot of opened files?

Hi,


If a file is already opened when snapshot command is issued,  the file
itself could be in an inconsistent state already. Before the file is
closed, maybe part of the file contains old data, the rest contains
new data.
How does a versioning filesystem guarantee that the file snapshot is
in a consistent state in this case?

I googled it but didn't find any answer. Can someone explain it a little bit?

Thanks
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Follow-Ups:
- Re: how do versioning filesystems take snapshot of opened files?
  - From: Chris Mason <[email protected]>

Prev by Date: Re: [PATCH] Remove process freezer from suspend to RAM pathway
Next by Date: Re: [PATCH 2/3] make cancel_xxx_work_sync() return a boolean
Previous by thread: Re: Fix empty macros in acpi.
Next by thread: Re: how do versioning filesystems take snapshot of opened files?
Index(es):
- Date
- Thread

[Index of Archives] [Kernel Newbies] [Netfilter] [Bugtraq] [Photo] [Stuff] [Gimp] [Yosemite News] [MIPS Linux] [ARM Linux] [Linux Security] [Linux RAID] [Video 4 Linux] [Linux for the blind] [Linux Resources]