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Fix ObjectStore.LocalFileSystem.put_opts for blobfuse #5094

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merged 5 commits into from
Nov 27, 2023
Merged

Fix ObjectStore.LocalFileSystem.put_opts for blobfuse #5094

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5326dfb
Fix ObjectStore.LocalFileSystem.put_opts for blobfuse
RobinLin666 Nov 18, 2023
f107dc0
Fix ObjectStore.LocalFileSystem.put_opts for blobfuse
RobinLin666 Nov 18, 2023
2fffc37
fix comment
RobinLin666 Nov 18, 2023
f25ace3
fix race condition
RobinLin666 Nov 19, 2023
f5677bf
add comment
RobinLin666 Nov 20, 2023
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56 changes: 32 additions & 24 deletions object_store/src/local.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -338,28 +338,41 @@ impl ObjectStore for LocalFileSystem {
maybe_spawn_blocking(move || {
let (mut file, suffix) = new_staged_upload(&path)?;
let staging_path = staged_upload_path(&path, &suffix);
let mut e_tag = None;

let err = match file.write_all(&bytes) {
Ok(_) => match opts.mode {
PutMode::Overwrite => match std::fs::rename(&staging_path, &path) {
Ok(_) => None,
Err(source) => Some(Error::UnableToRenameFile { source }),
},
PutMode::Create => match std::fs::hard_link(&staging_path, &path) {
Ok(_) => {
let _ = std::fs::remove_file(&staging_path); // Attempt to cleanup
None
Ok(_) => {
let metadata = file.metadata().map_err(|e| Error::Metadata {
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Does this work with blobfuse, the original description suggested the file had to be closed before the metadata could be retrieved?

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Yes, it works with blobfuse. Because when it sends stat system call, blobfuse will look for local file cache firstly and it will success.

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Can you confirm if this works

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Yes, I have tested it in local and it worked.

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Hi @tustvold, you can see https://github.com/Azure/azure-storage-fuse/blob/master/blobfuse/utilities.cpp#L136
image

For metadate request, blobfuse will check local cache firstly and skip remote request. It's different with rename requests.

source: e.into(),
path: path.to_string_lossy().to_string(),
})?;
e_tag = Some(get_etag(&metadata));
match opts.mode {
PutMode::Overwrite => {
// For some fuse types of file systems, the file must be closed first
// to trigger the upload operation, and then renamed, such as Blobfuse
std::mem::drop(file);
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Could we get a comment explaining the purpose of this to future readers, otherwise it is likely to be accidentally removed

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Sure, thanks

match std::fs::rename(&staging_path, &path) {
Ok(_) => None,
Err(source) => Some(Error::UnableToRenameFile { source }),
}
}
Err(source) => match source.kind() {
ErrorKind::AlreadyExists => Some(Error::AlreadyExists {
path: path.to_str().unwrap().to_string(),
source,
}),
_ => Some(Error::UnableToRenameFile { source }),
PutMode::Create => match std::fs::hard_link(&staging_path, &path) {
Ok(_) => {
let _ = std::fs::remove_file(&staging_path); // Attempt to cleanup
None
}
Err(source) => match source.kind() {
ErrorKind::AlreadyExists => Some(Error::AlreadyExists {
path: path.to_str().unwrap().to_string(),
source,
}),
_ => Some(Error::UnableToRenameFile { source }),
},
},
},
PutMode::Update(_) => unreachable!(),
},
PutMode::Update(_) => unreachable!(),
}
}
Err(source) => Some(Error::UnableToCopyDataToFile { source }),
};

Expand All @@ -368,13 +381,8 @@ impl ObjectStore for LocalFileSystem {
return Err(err.into());
}

let metadata = file.metadata().map_err(|e| Error::Metadata {
source: e.into(),
path: path.to_string_lossy().to_string(),
})?;

Ok(PutResult {
e_tag: Some(get_etag(&metadata)),
e_tag,
version: None,
})
})
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