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media-types: Define layer media types suffix '+zstd' #788

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merged 1 commit into from
Aug 21, 2019

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giuseppe
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Closes: #787

Signed-off-by: Giuseppe Scrivano [email protected]

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@giuseppe
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@AkihiroSuda thanks for the review. Pushed a new version

@rhatdan
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rhatdan commented Aug 21, 2019

@brendandburns @cyphar @jbouzane @jstarks @philips @stevvooe @xiekeyang PTAL

@giuseppe Any idea how to fix travis?

@giuseppe
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@giuseppe Any idea how to fix travis?

I've opened another PR to address the error raised by "make lint": #789

@giuseppe
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rebased on top of the fix for travis

@jonboulle
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jonboulle commented Aug 21, 2019

LGTM

Approved with PullApprove

@rhatdan
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rhatdan commented Aug 21, 2019

@vbatts PTAL

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vbatts commented Aug 21, 2019

LGTM

Approved with PullApprove

@vbatts vbatts merged commit 9f4348a into opencontainers:master Aug 21, 2019
giuseppe added a commit to giuseppe/image that referenced this pull request Nov 18, 2020
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Nov 18, 2020
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Nov 19, 2020
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Nov 19, 2020
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Nov 20, 2020
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Nov 20, 2020
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Nov 25, 2020
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request May 20, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request May 20, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request May 20, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request May 20, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request May 31, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Jun 7, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Jun 29, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Jun 29, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Jun 29, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Jun 30, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/image that referenced this pull request Jul 2, 2021
add a new custom variant of the zstd compression that permits to
retrieve each file separately.

The idea is based on CRFS and its stargz format for having seekable
and indexable tarballs.

One disadvantage of the stargz format is that a custom file is added
to the tarball to store the layer metadata, and the metadata file is
part of the image itself.  Clients that are not aware of the stargz
format will propagate the metadata file inside of the containers.

The zstd compression supports embeddeding additional data as part of
the stream that the zstd decompressor will ignore (skippable frame),
so the issue above with CRFS can be solved directly within the zstd
compression format.

Beside this minor advantage, zstd is much faster and compresses better
than gzip, so take this opportunity to push the zstd format further.

The zstd compression is supported by the OCI image specs since August
2019: opencontainers/image-spec#788 and has
been supported by containers/image since then.

Clients that are not aware of the zstd:chunked format, won't notice
any difference when handling a blob that uses the variant.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/docker that referenced this pull request Sep 16, 2021
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/docker that referenced this pull request Sep 16, 2021
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/docker that referenced this pull request Sep 16, 2021
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/docker that referenced this pull request Sep 16, 2021
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
giuseppe added a commit to giuseppe/docker that referenced this pull request Sep 16, 2021
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
docker-jenkins pushed a commit to docker-archive/docker-ce that referenced this pull request Sep 17, 2021
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
Upstream-commit: e187eb2bb5f0c3f899fe643e95d1af8c57e89a73
Component: engine
evol262 pushed a commit to evol262/moby that referenced this pull request Jan 12, 2022
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
Romain-Geissler-1A pushed a commit to Romain-Geissler-1A/moby that referenced this pull request Mar 5, 2022
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
Romain-Geissler-1A pushed a commit to Romain-Geissler-1A/moby that referenced this pull request Mar 5, 2022
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
dims pushed a commit to dims/containerd-api-only that referenced this pull request Mar 10, 2022
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
dims pushed a commit to dims/containerd-api-only that referenced this pull request Mar 26, 2022
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
akhilerm pushed a commit to akhilerm/containerd-api that referenced this pull request May 23, 2022
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
akhilerm pushed a commit to akhilerm/containerd-api that referenced this pull request Oct 4, 2022
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>
akhilerm pushed a commit to akhilerm/containerd-test that referenced this pull request Feb 22, 2023
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>

Containerd-test-commit: 30802fa
akhilerm pushed a commit to akhilerm/containerd-test that referenced this pull request Feb 22, 2023
zstd is a compression algorithm that has a very fast decoder, while
providing also good compression ratios.  The fast decoder makes it
suitable for container images, as decompressing the tarballs is a very
expensive operation.

opencontainers/image-spec#788 added support
for zstd to the OCI image specs.

Signed-off-by: Giuseppe Scrivano <[email protected]>

Containerd-test-commit: 1bb191c
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add application/vnd.oci.image.layer.v1.tar+zstd to official media type?
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