k-space/rawfile-localpv
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8 Commits

Author SHA1 Message Date
Mehran Kholdi
4d6d83c24a Support xfs filesystem 2021-07-01 22:34:20 +04:30
Mehran Kholdi
7c7e8eb4ce btrfs: Change default subvol upon creation 
The default root subvol comes with its own limitations and it might be
better off changing the default subvol upon creation. This should also
let us create hidden subvols that may be used for storing snapshots,
without exposing them to the end-user.
 2021-07-01 22:34:20 +04:30
Mehran Kholdi
c11646e08c btrfs: Mount with flushoncommit flag 
Not an expert on this, but my understanding is that without this flag,
outages will result in a state that despite being consistent, most
applications are not mature enough to handle. Namely, we ran benchmarks
that reproduced appearance of zero-length files upon sudden poweroffs.

Databases should be fine since they know well about the guarantees the
filesystem must provide, but not applications are databases. So let's
play safe about this.

See:
- https://thunk.org/tytso/blog/2009/03/12/delayed-allocation-and-the-zero-length-file-problem/
- https://github.com/Zygo/bees/issues/68#issuecomment-403262059
 2021-06-26 03:51:40 +04:30
Mehran Kholdi
d52f8ffbe0 ext4: Do not reserve free space for root user upon creation 
PVCs are data volumes most of the times, and reserving space for system
tasks is probably unnecessary.

The user can still modify a specific PVC's reserved blocks through the
`tune2fs` command.
 2021-06-26 03:51:40 +04:30
Mehran Kholdi
1cd4ca3d1f Refactor: code cleanup 2021-06-26 02:51:02 +04:30
Mehran Kholdi
c58dd14bf7 Extract blockdevice-to-filesystem logic from rawfile servicer 
Summary: So that it's possible to use it with any other blockdevice provider.

Test Plan: N/A

Reviewers: sina_rad, h.marvi, mhyousefi, s.afshari

Differential Revision: https://phab.hamravesh.ir/D870
 2021-01-16 03:58:08 +03:30
Mehran Kholdi
01a35354b6 Fix a bug where broken symlinks where not being cleaned up 
See: https://docs.python.org/3/library/pathlib.html#pathlib.Path.exists
"Note If the path points to a symlink, exists() returns whether the symlink points to an existing file or directory."
 2021-01-16 03:45:09 +03:30
Mehran Kholdi
8b1be18a15 Hotfix: Make side effects idempotent 2020-06-14 05:10:32 +04:30