Implement File modified time

[martinsmmm]

Thanks for making the fuse driver.

Any chance to provide some update about 'if' and 'when' the attributes will be available ? What is the plan ?

We are particularly interested in file modification time.

Some file system APIs have not been implemented: readlink, symlink, link, chmod, chown, fsync, lock and extended attribute calls.

Thank you!

[seguler]

File modification time is already available. Isn't it ? You should see last modified time of the blob when you list files.

One exception is when you open a file, then you will start seeing the time when the file got downloaded to your machine because you are essentially working on a copy of the blob on your machine until you close the file.

[cvalla]

Hello and thank you for your great job.
Files date attribute are all set to 1 gen 1970 when you mount the azure storage.
On Ubuntu 16.04 Installed blobfuse from the microsoft deb repository yesterday.
mounted azure blob on /azure path (with /mnt/azuretmp temp path) using root user.

ls -latr command output issued by root is like:

-rwxrwx--- 1 root root 858680 gen 1 1970 FILE1.zip
-rwxrwx--- 1 root root 1001214 gen 1 1970 FILE2.zip

[seguler]

Oh you are right. I was confused. We implemented timestamp support in this PR #29 but never merged... We should implement this.

[seguler]

I have implemented this in PR #102 - I am not sure if this PR will make to a release, but test and let us know here.

One caveat is that files timestamps are retrieved from Blob Last-Modified time, however for directories there is no last-modified time on Blob storage. So I am showing the time of list operation for directories.

[martinsmmm]

Hi @seguler / all,
Sorry for slow response - get sick last week. Great news!

I will test it during tomorrow and share results. As per your description this is what we are looking for.

Our use case is: We are using Blobstorage as backend/storage for FTP solution. In some cases we need attributes to know which files (luckily not directories) are new (since 'last time') for processing pipeline (Hello Biztalk).

Thank you,
Martin

[martinsmmm]

Hi all,
Tested the PR #102 .

The attributes are showing correctly. Thanks @seguler

root@xxx:/xxx/xxx/xxx/xxxtest# ls -la
total 0
drwxrwx--- 3 root root       4096 Feb 20 03:24 .
drwxrwx--- 3 root root       4096 Feb 20 03:24 ..
-rwxrwx--- 1 root root   10485760 Feb  5 03:45 10MB.zip
drwxrwx--- 3 root root       4096 Feb 20 03:24 380855
-rwxrwx--- 1 root root 3006922752 Feb  9 20:02 box-disk1.vmdk
-rwxrwx--- 1 root root          0 Feb  5 03:45 empty-file.txt
drwxrwx--- 3 root root       4096 Feb 20 03:24 test
-rwxrwx--- 1 root root          0 Feb  5 03:46 testfile

1970 is gone (#95 (comment)).

We will await merge / release.

Huge Thanks!
Martin

[martinsmmm]

Just additional note for folders modification time.

Would it be possible to re-use the information which is displayed on Azure portal UI as '.directory' ?
See the modified column on screenshots.

Maybe, this is possibly overlooked low hanging fruit. (?)

Thanks,
Martin

[seguler]

This makes sense! I'll look into the feasibility in the code

[seguler]

So - I wanna leave the directory timestamps to later... Currently we do not check the existence of .directory file and instead do list_blobs with the prefix to determine if a directory exists or not. Because of this, the code is not very suitable to report the directory timestamps at the moment.

Will keep this issue open until we figure out a way to report directory timestamps properly.

[seguler]

I'll close this as File modified time is implemented in blobfuse 0.3. Will open another one for directory timestamps.

[hafizullah]

@seguler is there a PR open for the directory timestamp?