Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Optimize writes to existing Zarr stores. #8875

Merged
merged 4 commits into from Mar 29, 2024
Merged

Optimize writes to existing Zarr stores. #8875

Changes from 1 commit
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
eb37aed
Optimize writes to existing Zarr stores.
dcherian Mar 22, 2024
e0a3e10
Add test
dcherian Mar 28, 2024
0dc71d4
Merge branch 'main' into optimize-zarr-appends
dcherian Mar 28, 2024
6d89099
fix test
dcherian Mar 28, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
7 changes: 6 additions & 1 deletion xarray/backends/zarr.py
View file
Open in desktop
Expand Up @@ -623,7 +623,12 @@ def store(
# avoid needing to load index variables into memory.
# TODO: consider making loading indexes lazy again?
existing_vars, _, _ = conventions.decode_cf_variables(
self.get_variables(), self.get_attrs()
{
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

feels like we should also be skipping this for mode="w" to allow overwriting the existing encoding?

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Can you expand on what you mean? Is that because we would have just written these vars so already know their values/schema?

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

mode="w" means overwrite so we shoudn't care about encoding on disk, no?

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I added a test, the encoding does get update as expected with mode="w", so presumably zarr is nuking the store with mode="w".

k: v
for k, v in self.get_variables().items()
if k in existing_variable_names
},
self.get_attrs(),
)
# Modified variables must use the same encoding as the store.
vars_with_encoding = {}
Expand Down