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Provide file hashes in the URLs to avoid unnecessary file downloads (bandwidth saver) #1433

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merged 15 commits into from
Sep 23, 2023
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Provide file hashes in the URLs to avoid unnecessary file downloads (bandwidth saver) #1433

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e7e9bce
Supply sha256 query parameters using boto3 to avoid hundreds of extra…
matteius Jun 17, 2023
713cfea
Safety check for when checksum isn't found.
matteius Jun 17, 2023
b3799a8
PR feedback
matteius Jul 6, 2023
089e93d
Retrieve the checksum if present in the from_S3 method and change obj…
matteius Jul 13, 2023
a604491
PR feedback
matteius Jul 13, 2023
984f7dd
Update s3_management/manage.py
matteius Jul 14, 2023
9966096
Update s3_management/manage.py
matteius Jul 14, 2023
8312f09
fix missed conversion of objects to dict.
matteius Jul 14, 2023
b65a945
Update s3_management/manage.py
matteius Aug 1, 2023
1d11042
fix import
matteius Aug 1, 2023
8895930
Refactor: PR feedback to use dataclass to organize potentially multip…
matteius Aug 1, 2023
5d132b9
Update s3_management/manage.py
matteius Aug 1, 2023
744503f
Update s3_management/manage.py
matteius Aug 1, 2023
f7e6d7f
Update s3_management/manage.py
matteius Aug 1, 2023
004fa70
Update s3_management/manage.py
matteius Aug 1, 2023
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40 changes: 24 additions & 16 deletions s3_management/manage.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,6 @@


S3 = boto3.resource('s3')
CLIENT = boto3.client('s3')
BUCKET = S3.Bucket('pytorch')

ACCEPTED_FILE_EXTENSIONS = ("whl", "zip", "tar.gz")
Expand Down Expand Up @@ -121,8 +120,8 @@ def between_bad_dates(package_build_time: datetime):


class S3Index:
def __init__(self: S3IndexType, objects: List[str], prefix: str) -> None:
self.objects = objects
def __init__(self: S3IndexType, objects: Dict[str, str], prefix: str) -> None:
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The RHS should be str | None

Suggested change
def __init__(self: S3IndexType, objects: Dict[str, str], prefix: str) -> None:
def __init__(self: S3IndexType, objects: Dict[str, str | None], prefix: str) -> None:

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I think there's a couple other places this should be done as well.

self.objects = objects # s3 key to checksum mapping
self.prefix = prefix.rstrip("/")
self.html_name = PREFIXES_WITH_HTML[self.prefix]
# should dynamically grab subdirectories like whl/test/cu101
Expand All @@ -146,7 +145,7 @@ def nightly_packages_to_show(self: S3IndexType) -> Set[str]:
# also includes versions without GPU specifier (i.e. cu102) for easier
# sorting, sorts in reverse to put the most recent versions first
all_sorted_packages = sorted(
{self.normalize_package_version(obj) for obj in self.objects},
{self.normalize_package_version(s3_key) for s3_key in self.objects.keys()},
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flake8-simplify (link) suggests just iterating over the dict instead of explicitly calling .keys(). We could talk about the likely very itty bitty performance bump, but lol.

Is there a reason you prefer .keys()?

key=lambda name_ver: parse(name_ver.split('-', 1)[-1]),
reverse=True,
)
Expand All @@ -166,10 +165,12 @@ def nightly_packages_to_show(self: S3IndexType) -> Set[str]:
to_hide.add(obj)
else:
packages[package_name] += 1
return set(self.objects).difference({
obj for obj in self.objects
if self.normalize_package_version(obj) in to_hide
})
nightly_packages = {}
for obj, checksum in self.objects.items():
normalized_package_version = self.normalize_package_version(obj)
if not normalized_package_version in to_hide:
nightly_packages[normalized_package_version] = checksum
return nightly_packages
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Also the return type needs updating


def is_obj_at_root(self, obj:str) -> bool:
return path.dirname(obj) == self.prefix
Expand All @@ -190,15 +191,15 @@ def gen_file_list(
else self.objects
)
subdir = self._resolve_subdir(subdir) + '/'
for obj in objects:
for obj, checksum in objects.items():
if package_name is not None:
if self.obj_to_package_name(obj) != package_name:
continue
if self.is_obj_at_root(obj) or obj.startswith(subdir):
yield obj
yield obj, checksum
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The return type of this function needs updating

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I believe this is fixed now.


def get_package_names(self, subdir: Optional[str] = None) -> List[str]:
return sorted(set(self.obj_to_package_name(obj) for obj in self.gen_file_list(subdir)))
return sorted(set(self.obj_to_package_name(obj) for obj, _ in self.gen_file_list(subdir)))

def normalize_package_version(self: S3IndexType, obj: str) -> str:
# removes the GPU specifier from the package name as well as
Expand Down Expand Up @@ -226,7 +227,7 @@ def to_legacy_html(
out: List[str] = []
subdir = self._resolve_subdir(subdir)
is_root = subdir == self.prefix
for obj in self.gen_file_list(subdir):
for obj, _ in self.gen_file_list(subdir):
# Strip our prefix
sanitized_obj = obj.replace(subdir, "", 1)
if sanitized_obj.startswith('/'):
Expand Down Expand Up @@ -254,8 +255,11 @@ def to_simple_package_html(
out.append('<html>')
out.append(' <body>')
out.append(' <h1>Links for {}</h1>'.format(package_name.lower().replace("_","-")))
for obj in sorted(self.gen_file_list(subdir, package_name)):
out.append(f' <a href="/{obj}">{path.basename(obj).replace("%2B","+")}</a><br/>')
for obj, checksum in sorted(self.gen_file_list(subdir, package_name)):
if checksum:
out.append(f' <a href="/{obj}#sha256={checksum}">{path.basename(obj).replace("%2B","+")}</a><br/>')
else:
out.append(f' <a href="/{obj}">{path.basename(obj).replace("%2B","+")}</a><br/>')
# Adding html footer
out.append(' </body>')
out.append('</html>')
Expand Down Expand Up @@ -316,7 +320,6 @@ def upload_pep503_htmls(self) -> None:
Body=self.to_simple_package_html(subdir=subdir, package_name=pkg_name)
)


def save_legacy_html(self) -> None:
for subdir in self.subdirs:
print(f"INFO Saving {subdir}/{self.html_name}")
Expand Down Expand Up @@ -348,10 +351,13 @@ def from_S3(cls: Type[S3IndexType], prefix: str) -> S3IndexType:
for pattern in ACCEPTED_SUBDIR_PATTERNS
]) and obj.key.endswith(ACCEPTED_FILE_EXTENSIONS)
if is_acceptable:
response = obj.meta.client.head_object(Bucket=BUCKET.name, Key=obj.key, ChecksumMode="ENABLED")
sha256 = response.get("ChecksumSHA256")
sanitized_key = obj.key.replace("+", "%2B")
objects.append(sanitized_key)
objects.append((sanitized_key, sha256))
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This still has objects as a list. I don't see it being converted to a dict anywhere?

I think you can just change it on line 343 to a dict and here to objects[sanitized_key] = sha256

return cls(objects, prefix)


def create_parser() -> argparse.ArgumentParser:
parser = argparse.ArgumentParser("Manage S3 HTML indices for PyTorch")
parser.add_argument(
Expand All @@ -363,6 +369,7 @@ def create_parser() -> argparse.ArgumentParser:
parser.add_argument("--generate-pep503", action="store_true")
return parser


def main():
parser = create_parser()
args = parser.parse_args()
Expand All @@ -387,5 +394,6 @@ def main():
if args.generate_pep503:
idx.upload_pep503_htmls()


if __name__ == "__main__":
main()