Re: [s3ql] About s3ql file truncate

[jingjie li]

＞The only situation where S3QL creates an object that contains only zeros 
＞is if you created a file (inside the S3QL file system) that contains 
＞that many zeros.

　I don’t create an object that contains only zeros.

 In the beginning of transferred a file that size > max_object_size, S3QL 
truncate an object that contains only zeros, and set dirty flag to True in 
s3ql.block_cache.truncate() function.

This is only happened in the way that copy&paste a file that size is greater 
than  max_object_size from win7 by samba.

 

I want to avoid this problem by the way below, please help me to confirm that 
is it OK? it will cause other problems or not?

 

class CacheEntry(object):

   .....

-   def truncate(self, size=None):

+   def truncate(self, size=None, dirty_flag=True):

-       self.dirty = True

+       self.dirty = dirty_flag

        self.fh.truncate(size)

   .....

 

class Operations(llfuse.Operations):

    .....

    def setattr(self, id_, attr, fields, fh, ctx):

        .....

        try:

            with self.cache.get(id_, last_block) as fh:

-               fh.truncate(cutoff)

+               fh.truncate(cutoff,False)

        except NoSuchObject as exc:

    .....

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