compression with btrfs-send / btrfs-receive
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When I send a compressed subvol (i.e., one part of a filesystem mounted with the compress mount option) with btrfs-send, does btrfs-send send it compressed, or does it decompress it first?
Similarly, when I receive the subvol with btrfs-receive, does btrfs-receive re-compress?
btrfs compression
asked Mar 22 at 15:52
Geremia
509716
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up vote
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When I send a compressed subvol (i.e., one part of a filesystem mounted with the compress mount option) with btrfs-send, does btrfs-send send it compressed, or does it decompress it first?
Similarly, when I receive the subvol with btrfs-receive, does btrfs-receive re-compress?
btrfs compression
asked Mar 22 at 15:52
Geremia
509716
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
When I send a compressed subvol (i.e., one part of a filesystem mounted with the compress mount option) with btrfs-send, does btrfs-send send it compressed, or does it decompress it first?
Similarly, when I receive the subvol with btrfs-receive, does btrfs-receive re-compress?
btrfs compression
asked Mar 22 at 15:52
Geremia
509716
When I send a compressed subvol (i.e., one part of a filesystem mounted with the compress mount option) with btrfs-send, does btrfs-send send it compressed, or does it decompress it first?
Similarly, when I receive the subvol with btrfs-receive, does btrfs-receive re-compress?
btrfs compression
asked Mar 22 at 15:52
Geremia
509716
asked Mar 22 at 15:52
Geremia
509716
asked Mar 22 at 15:52
Geremia
509716
asked Mar 22 at 15:52
Geremia
509716
509716
add a comment |Â
add a comment |Â
1 Answer
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btrfs-send will perform read syscalls, which means it will decompress the data indeed. Then data are streamed uncompressed, and btrfs-receive will perform write syscalls, which will compress depending on the target btrfs system compress mount option.
So for instance, you could have an existing btrfs system with all kinds of compression used for different files, and write to a new one where all data will be zstd-compressed.
answered May 21 at 19:12
Archange
713
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
btrfs-send will perform read syscalls, which means it will decompress the data indeed. Then data are streamed uncompressed, and btrfs-receive will perform write syscalls, which will compress depending on the target btrfs system compress mount option.
So for instance, you could have an existing btrfs system with all kinds of compression used for different files, and write to a new one where all data will be zstd-compressed.
answered May 21 at 19:12
Archange
713
add a comment |Â
up vote
2
down vote
accepted
btrfs-send will perform read syscalls, which means it will decompress the data indeed. Then data are streamed uncompressed, and btrfs-receive will perform write syscalls, which will compress depending on the target btrfs system compress mount option.
So for instance, you could have an existing btrfs system with all kinds of compression used for different files, and write to a new one where all data will be zstd-compressed.
answered May 21 at 19:12
Archange
713
add a comment |Â
up vote
2
down vote
accepted
up vote
2
down vote
accepted
btrfs-send will perform read syscalls, which means it will decompress the data indeed. Then data are streamed uncompressed, and btrfs-receive will perform write syscalls, which will compress depending on the target btrfs system compress mount option.
So for instance, you could have an existing btrfs system with all kinds of compression used for different files, and write to a new one where all data will be zstd-compressed.
answered May 21 at 19:12
Archange
713
btrfs-send will perform read syscalls, which means it will decompress the data indeed. Then data are streamed uncompressed, and btrfs-receive will perform write syscalls, which will compress depending on the target btrfs system compress mount option.
So for instance, you could have an existing btrfs system with all kinds of compression used for different files, and write to a new one where all data will be zstd-compressed.
answered May 21 at 19:12
Archange
713
answered May 21 at 19:12
Archange
713
answered May 21 at 19:12
Archange
713
answered May 21 at 19:12
Archange
713
713
add a comment |Â
add a comment |Â
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