Hi Nikolaus

First, thank you for the great software.

I have a question about the file truncate. Please help me!


The question is that when I set the max-obj-size to 2000000(2G), then put a
2.5G file(>max-obj-size) from win7 by samba,
the S3QL will put a file that size is 0.5G and content is zero to swift
except the actual file data. 
PS: I can't find similar questions in the issue list and the list at
https://groups.google.com/d/forum/s3ql.


My environment: openstack swift2.5 + s3ql2.17.1
Test steps:
 1.I set the max-obj-size to 2000000.(2G),then mount the container.
 2. Put(copy&paste) a file that size is 2.5G from win7 by samba.
 
Actual result:
 1. S3ql will put a file that size is 0.5G and content is zero to swift.
 2. S3ql will put a file that size is 2G and content is actual file content
to swift.
 3. S3ql will delete the file that size is 0.5G and content is zero from
swift.
 4. S3ql will put a file that size is 0.5G and content is actual file
content to swift.
 
Expected result:
 1. S3ql will put a file that size is 2G and content is actual file content
to swift.
 2. S3ql will put a file that size is 0.5G and content is actual file
content to swift.

※About the test step 2, I also test these ways below.
   " Put a file that size is 2.5G by 'mv'/'cp'command in linux(centos7.2),
   " Put(copy&paste) a file that size is 2.5G from another linux by samba.
   " Create a file that size is 2.5G in the samba folder from win7.
 ==> There is't has the file that size is 0.5G and content is zero in these
ways!
    So,I think this problem is only happen in the way that copy&paste a file
that size is 2.5G from win7 by samba.

I study the S3QL's source and log files.
The reason about this problem is that When put the 2.5G file, S3QL will
truncate a file that size is 0.5G and content is zero,
and set dirty flag to True(This process is in the
s3ql.block_cache.truncate() function).  Then in the CommitThread,
the condition that "not el.dirty or el in self.block_cache.in_transit:" will
be false, so self.block_cache.upload(el) will be called,
the file that size is 0.5G and content is zero will be put to swift.

when all the data are transferred over, S3QL will create a new object that
has actural data,but object address is same with the first file that content
is zero.
so S3QL will delete the first file that is old object.

/*******************************************************************/
I want to resolve 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:
    .....
/*******************************************************************/



Please refer to the log below: 
 ※1 -->When put the file, the fields.update_size value is 1 in the s3ql.fs.
setattr() function. 
 ※2 -->Then it will goto s3ql.block_cache._get_entry() function with
blockno is 1 to create the new block(s3ql_data_1).
 ※3 -->Then it will goto s3ql.block_cache.truncate() function with blockno
is 1,but at this time the block don't have data, 
        the truncate() function will create a file that content is zero.
 ※4 -->Then the block(s3ql_data_1) will be upload and put to swift.
 ※5 -->Create the new block(s3ql_data_2) that blockno is 0.
 ※6 -->Create the new block(s3ql_data_3) that blockno is 1.
 ※7 -->Put the block(s3ql_data_2) that blockno is 0 to swift.
 ※8 -->Delete the s3ql_data_1.
 ※9 -->Put the block(s3ql_data_3) that blockno is 1 to swift.
 
 
     2016-10-13 09:36:07.295 464:fuse-worker-20 s3ql.fs.create: started with
id_p=1, b'HD.Club-4K001-100mbps.mp4'
     2016-10-13 09:36:07.313 464:fuse-worker-22 s3ql.fs.getattr: started
with 1
     2016-10-13 09:36:07.314 464:fuse-worker-21 s3ql.fs.getxattr: started
with 4, b'system.posix_acl_access'
     2016-10-13 09:36:07.314 464:fuse-worker-23 s3ql.fs.getxattr: started
with 4, b'system.posix_acl_access'
     2016-10-13 09:36:07.314 464:fuse-worker-24 s3ql.fs.setattr:
######lijingjie truncate attr.st_size  0
     2016-10-13 09:36:07.314 464:fuse-worker-24 s3ql.fs.setattr:
######lijingjie truncate self.max_obj_size  2048000000
     2016-10-13 09:36:07.314 464:fuse-worker-24 s3ql.fs.setattr:
######lijingjie truncate fields.update_size  0
     2016-10-13 09:36:07.314 464:fuse-worker-25 s3ql.fs.removexattr: started
with 4, b'security.ima'
     2016-10-13 09:36:07.315 464:fuse-worker-26 s3ql.fs.getxattr: started
with 4, b'system.posix_acl_access'
     2016-10-13 09:36:07.315 464:fuse-worker-27 s3ql.fs.getxattr: started
with 4, b'system.posix_acl_access'
     2016-10-13 09:36:07.315 464:fuse-worker-29 s3ql.fs.getxattr: started
with 1, b'system.posix_acl_access'
     2016-10-13 09:36:07.315 464:fuse-worker-28 s3ql.fs.getxattr: started
with 1, b'system.posix_acl_default'
     2016-10-13 09:36:07.527 464:fuse-worker-30 s3ql.fs.getxattr: started
with 1, b'system.posix_acl_access'
     2016-10-13 09:36:07.527 464:fuse-worker-1 s3ql.fs.getxattr: started
with 1, b'system.posix_acl_default'
     2016-10-13 09:36:07.527 464:fuse-worker-2 s3ql.fs.opendir: started with
1
     2016-10-13 09:36:07.528 464:fuse-worker-3 s3ql.fs.getxattr: started
with 1, b'system.posix_acl_access'
     2016-10-13 09:36:07.528 464:fuse-worker-4 s3ql.fs.getxattr: started
with 1, b'system.posix_acl_default'
     2016-10-13 09:36:07.529 464:fuse-worker-6 s3ql.fs.releasedir: started
with 1
     2016-10-13 09:36:07.532 464:fuse-worker-5 s3ql.fs.statfs: started
     2016-10-13 09:36:07.533 464:fuse-worker-7 s3ql.fs.setattr:
######lijingjie truncate attr.st_size  2711882958
     2016-10-13 09:36:07.534 464:fuse-worker-7 s3ql.fs.setattr:
######lijingjie truncate self.max_obj_size  2048000000
※1  2016-10-13 09:36:07.534 464:fuse-worker-7 s3ql.fs.setattr:
######lijingjie truncate fields.update_size  1
     2016-10-13 09:36:07.534 464:fuse-worker-7 s3ql.fs.setattr:
######lijingjie truncate last_block  1
     2016-10-13 09:36:07.534 464:fuse-worker-7 s3ql.block_cache.remove:
started with 4, 2, 0
     2016-10-13 09:36:07.535 464:fuse-worker-7 s3ql.block_cache.remove:
finished
※2  2016-10-13 09:36:07.535 464:fuse-worker-7 s3ql.block_cache._get_entry:
started with 4, 1
※2  2016-10-13 09:36:07.535 464:fuse-worker-7 s3ql.block_cache._get_entry:
creating new block
     2016-10-13 09:36:07.535 464:fuse-worker-7 s3ql.fs.setattr:
######lijingjie truncate size  663882958
※3  2016-10-13 09:36:07.535 464:fuse-worker-7 s3ql.block_cache.truncate:
######lijingjie truncate object size 663882958
     2016-10-13 09:36:07.535 464:fuse-worker-8 s3ql.fs.removexattr: started
with 4, b'security.ima'
     2016-10-13 09:36:07.535 464:fuse-worker-9 s3ql.fs.setattr:
######lijingjie truncate attr.st_size  0
     2016-10-13 09:36:07.536 464:fuse-worker-9 s3ql.fs.setattr:
######lijingjie truncate self.max_obj_size  2048000000
     2016-10-13 09:36:07.536 464:fuse-worker-9 s3ql.fs.setattr:
######lijingjie truncate fields.update_size  0
     2016-10-13 09:36:07.536 464:fuse-worker-10 s3ql.fs.removexattr: started
with 4, b'security.ima'
     2016-10-13 09:36:08.018 464:fuse-worker-11 s3ql.fs.getxattr: started
with 4, b'system.posix_acl_access'
     ........
     2016-10-13 09:36:23.396 464:CommitThread s3ql.block_cache.upload: PSDCD
DEBUG md5:(4ea955da0123c7fe5d6e026cf3316d9f):
hash:(681635ef6840209dba199deb3ccaabc8)
※4  2016-10-13 09:36:23.397 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=1>): created new object 1
※4  2016-10-13 09:36:23.398 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=1>): created new block 1
※4  2016-10-13 09:36:23.398 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=1>): adding to upload queue
※4  2016-10-13 09:36:23.398 464:CommitThread s3ql.block_cache.put: got
reader, enqueueing (<s3ql.block_cache.CacheEntry object at 0x7f13441ae118>,
1, '4ea955da0123c7fe5d6e026cf3316d9f')
     2016-10-13 09:36:23.398 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=1>): no old block, returning
     2016-10-13 09:36:23.399 464:Thread-8 s3ql.backends.swift.open_write:
started with s3ql_data_1
     ........
     2016-10-13 09:36:34.868 464:Thread-8 s3ql.backends.s3c.close: started
with s3ql_data_1
※4  2016-10-13 09:36:34.868 464:Thread-8 s3ql.backends.swift._do_request:
started with 'PUT', '/s3ql_data_1', None, None,
CaseInsensitiveDict({'X-Object-meta-md5': 'fn1+kHftkhNGGzPtpikInw==',
'X-Object-meta-format': 'raw2', 'X-Object-meta-001': "'data': b'eyAgfQ==',",
'Content-Type': 'application/octet-stream', 'X-Object-meta-000':
"'compression': 'None',", 'X-Object-meta-003': "'format_version': 2,",
'X-Object-meta-002': "'encryption': 'None',"}), <_io.FileIO name=14
mode='rb+'>
※4  2016-10-13 09:36:34.869 464:Thread-8 s3ql.backends.swift._do_request:
_do_request(): start with parameters ('PUT', '/s3ql_data_1', None, None,
CaseInsensitiveDict({'X-Object-meta-md5': 'fn1+kHftkhNGGzPtpikInw==',
'X-Object-meta-format': 'raw2', 'X-Object-meta-001': "'data': b'eyAgfQ==',",
'Content-Type': 'application/octet-stream', 'X-Object-meta-000':
"'compression': 'None',", 'X-Object-meta-003': "'format_version': 2,",
'X-Object-meta-002': "'encryption': 'None',"}), <_io.FileIO name=14
mode='rb+'>)
※4  2016-10-13 09:36:34.869 464:Thread-8
s3ql.backends.swift._do_request_inner: started with PUT
/v1/AUTH_bfd4e12cb3254bd1b1f10ea6b85e2070/lijingjie1/s3ql_data_1
     2016-10-13 09:36:34.870 464:Thread-8
s3ql.backends.swift._do_request_inner: waiting for 100-continue
     ........
     2016-10-13 09:37:51.000 464:Thread-8 s3ql.block_cache._do_upload:
_do_upload(1): uploaded 0 bytes in 87.602 seconds, 0.00 MiB/s
     ........
     2016-10-13 09:39:54.914 464:CommitThread s3ql.block_cache.upload: PSDCD
DEBUG md5:(6f9c6b43e46762b2e4771c54ce07e967):
hash:(83448b6a0b77df86e2a89212fc57d6ee)
※5  2016-10-13 09:39:54.914 464:fuse-worker-18 s3ql.fs.getxattr: started
with 4, b'security.capability'
※5  2016-10-13 09:39:54.940 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=0>): created new object 2
※5  2016-10-13 09:39:54.941 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=0>): created new block 2
     2016-10-13 09:39:54.941 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=0>): adding to upload queue
     2016-10-13 09:39:54.941 464:CommitThread s3ql.block_cache.put: got
reader, enqueueing (<s3ql.block_cache.CacheEntry object at 0x7f13441ae1e8>,
2, '6f9c6b43e46762b2e4771c54ce07e967')
     2016-10-13 09:39:54.981 464:fuse-worker-19 s3ql.block_cache._get_entry:
started with 4, 1
     2016-10-13 09:39:54.981 464:Thread-6 s3ql.backends.swift.open_write:
started with s3ql_data_2
     2016-10-13 09:39:55.051 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=0>): no old block, returning
     ........
     2016-10-13 09:40:20.765 464:CommitThread s3ql.block_cache.upload:
started with <Dirty CacheEntry, inode=4, blockno=1>
     2016-10-13 09:40:48.458 464:CommitThread s3ql.block_cache.upload: PSDCD
DEBUG md5:(fb3c3ba0f09688936e12c009d5fd0ed1):
hash:(8c42304d617a42338f05ff866cebd394)
※6  2016-10-13 09:40:48.458 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=1>): created new object 3
※6  2016-10-13 09:40:48.458 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=1>): created new block 3
※6  2016-10-13 09:40:48.458 464:CommitThread s3ql.block_cache.upload:
upload(<Dirty CacheEntry, inode=4, blockno=1>): adding to upload queue
     2016-10-13 09:40:48.459 464:CommitThread s3ql.block_cache.put: got
reader, enqueueing (<s3ql.block_cache.CacheEntry object at 0x7f13441ae118>,
3, 'fb3c3ba0f09688936e12c009d5fd0ed1')
     2016-10-13 09:40:48.519 464:Thread-5 s3ql.block_cache.get: waiting for
writer..
     2016-10-13 09:40:48.520 464:Thread-4 s3ql.block_cache.get: waiting for
writer..
     2016-10-13 09:40:48.520 464:Thread-7 s3ql.block_cache.get: waiting for
writer..
     2016-10-13 09:40:48.520 464:Thread-8 s3ql.block_cache.get: waiting for
writer..
     2016-10-13 09:40:48.520 464:CommitThread s3ql.block_cache._deref_block:
removing block 1
     2016-10-13 09:40:48.520 464:CommitThread s3ql.block_cache._deref_block:
removing object 1
     2016-10-13 09:40:48.520 464:CommitThread s3ql.block_cache._deref_block:
adding 1 to removal queue
     2016-10-13 09:40:48.521 464:Thread-9 s3ql.block_cache._removal_loop:
reading from queue (blocking=False)
     2016-10-13 09:40:48.521 464:Thread-9 s3ql.block_cache._removal_loop:
removing: [1]
     2016-10-13 09:40:48.756 464:Thread-3
s3ql.backends.common.get_ssl_context: Reading default CA certificates.
     2016-10-13 09:40:48.912 464:Thread-3 s3ql.backends.swift._do_request:
started with 'GET', '/', None, {'limit': 1}, None, None
     2016-10-13 09:40:48.912 464:Thread-3 s3ql.backends.swift._do_request:
_do_request(): start with parameters ('GET', '/', None, {'limit': 1},
CaseInsensitiveDict({}), None)
     2016-10-13 09:40:48.912 464:Thread-3 s3ql.backends.swift._do_request:
no active connection, calling _get_conn()
     2016-10-13 09:40:48.912 464:Thread-3 s3ql.backends.swiftks._get_conn:
started
     2016-10-13 09:41:07.945 464:Thread-3
s3ql.backends.swift._do_request_inner: started with GET
/v1/AUTH_bfd4e12cb3254bd1b1f10ea6b85e2070/lijingjie1/?limit=1
     2016-10-13 09:41:28.587 464:Thread-6 s3ql.backends.s3c.close: started
with s3ql_data_2
※7  2016-10-13 09:41:28.587 464:Thread-6 s3ql.backends.swift._do_request:
started with 'PUT', '/s3ql_data_2', None, None,
CaseInsensitiveDict({'X-Object-meta-md5': 'fn1+kHftkhNGGzPtpikInw==',
'X-Object-meta-format': 'raw2', 'X-Object-meta-001': "'data': b'eyAgfQ==',",
'Content-Type': 'application/octet-stream', 'X-Object-meta-000':
"'compression': 'None',", 'X-Object-meta-003': "'format_version': 2,",
'X-Object-meta-002': "'encryption': 'None',"}), <_io.FileIO name=14
mode='rb+'>
※7  2016-10-13 09:41:28.588 464:Thread-6 s3ql.backends.swift._do_request:
_do_request(): start with parameters ('PUT', '/s3ql_data_2', None, None,
CaseInsensitiveDict({'X-Object-meta-md5': 'fn1+kHftkhNGGzPtpikInw==',
'X-Object-meta-format': 'raw2', 'X-Object-meta-001': "'data': b'eyAgfQ==',",
'Content-Type': 'application/octet-stream', 'X-Object-meta-000':
"'compression': 'None',", 'X-Object-meta-003': "'format_version': 2,",
'X-Object-meta-002': "'encryption': 'None',"}), <_io.FileIO name=14
mode='rb+'>)
※7  2016-10-13 09:41:28.588 464:Thread-6
s3ql.backends.swift._do_request_inner: started with PUT
/v1/AUTH_bfd4e12cb3254bd1b1f10ea6b85e2070/lijingjie1/s3ql_data_2
     2016-10-13 09:41:28.588 464:Thread-6
s3ql.backends.swift._do_request_inner: waiting for 100-continue
     2016-10-13 09:41:31.983 464:Thread-6
s3ql.backends.swift._do_request_inner: writing body data
     ........
     2016-10-13 09:43:08.454 464:Thread-3 s3ql.backends.swift.open_write:
started with s3ql_data_3
     2016-10-13 09:43:08.757 464:Thread-9
s3ql.backends.common.get_ssl_context: Reading default CA certificates.
     2016-10-13 09:43:08.787 464:Thread-9 s3ql.backends.swift._do_request:
started with 'GET', '/', None, {'limit': 1}, None, None
     2016-10-13 09:43:08.787 464:Thread-9 s3ql.backends.swift._do_request:
_do_request(): start with parameters ('GET', '/', None, {'limit': 1},
CaseInsensitiveDict({}), None)
     2016-10-13 09:43:08.792 464:Thread-9 s3ql.backends.swift._do_request:
no active connection, calling _get_conn()
     2016-10-13 09:43:08.792 464:Thread-9 s3ql.backends.swiftks._get_conn:
started
     2016-10-13 09:43:21.334 464:Thread-9
s3ql.backends.swift._do_request_inner: started with GET
/v1/AUTH_bfd4e12cb3254bd1b1f10ea6b85e2070/lijingjie1/?limit=1
     2016-10-13 09:43:37.389 464:fuse-worker-21 s3ql.fs.getxattr: started
with 4, b'system.posix_acl_access'
     2016-10-13 09:43:38.573 464:fuse-worker-23 s3ql.fs.open: started with 4
     2016-10-13 09:43:38.852 464:fuse-worker-24 s3ql.fs.flush: started with
4
     2016-10-13 09:43:38.852 464:fuse-worker-25 s3ql.fs.release: started
with 4
     2016-10-13 09:43:38.854 464:fuse-worker-26 s3ql.fs.getxattr: started
with 4, b'system.posix_acl_access'
     2016-10-13 09:43:38.854 464:fuse-worker-27 s3ql.fs.open: started with 4
     2016-10-13 09:43:38.854 464:fuse-worker-29 s3ql.fs.flush: started with
4
     2016-10-13 09:43:38.854 464:fuse-worker-28 s3ql.fs.release: started
with 4
     2016-10-13 09:43:41.211 464:Thread-9 s3ql.backends.swift.delete:
started with s3ql_data_1
※8  2016-10-13 09:43:41.211 464:Thread-9 s3ql.backends.swift._do_request:
started with 'DELETE', '/s3ql_data_1', None, None, None, None
※8  2016-10-13 09:43:41.310 464:Thread-9 s3ql.backends.swift._do_request:
_do_request(): start with parameters ('DELETE', '/s3ql_data_1', None, None,
CaseInsensitiveDict({}), None)
     2016-10-13 09:43:41.312 464:Thread-9
s3ql.backends.swift._do_request_inner: started with DELETE
/v1/AUTH_bfd4e12cb3254bd1b1f10ea6b85e2070/lijingjie1/s3ql_data_1
     2016-10-13 09:43:43.369 464:Thread-9 s3ql.block_cache._removal_loop:
reading from queue (blocking=True)
     2016-10-13 09:44:23.362 464:Thread-3 s3ql.backends.s3c.close: started
with s3ql_data_3
※9  2016-10-13 09:44:23.363 464:Thread-3 s3ql.backends.swift._do_request:
started with 'PUT', '/s3ql_data_3', None, None,
CaseInsensitiveDict({'X-Object-meta-md5': 'fn1+kHftkhNGGzPtpikInw==',
'X-Object-meta-format': 'raw2', 'X-Object-meta-001': "'data': b'eyAgfQ==',",
'Content-Type': 'application/octet-stream', 'X-Object-meta-000':
"'compression': 'None',", 'X-Object-meta-003': "'format_version': 2,",
'X-Object-meta-002': "'encryption': 'None',"}), <_io.FileIO name=16
mode='rb+'>
※9  2016-10-13 09:44:23.363 464:Thread-3 s3ql.backends.swift._do_request:
_do_request(): start with parameters ('PUT', '/s3ql_data_3', None, None,
CaseInsensitiveDict({'X-Object-meta-md5': 'fn1+kHftkhNGGzPtpikInw==',
'X-Object-meta-format': 'raw2', 'X-Object-meta-001': "'data': b'eyAgfQ==',",
'Content-Type': 'application/octet-stream', 'X-Object-meta-000':
"'compression': 'None',", 'X-Object-meta-003': "'format_version': 2,",
'X-Object-meta-002': "'encryption': 'None',"}), <_io.FileIO name=16
mode='rb+'>)
※9  2016-10-13 09:44:23.363 464:Thread-3
s3ql.backends.swift._do_request_inner: started with PUT
/v1/AUTH_bfd4e12cb3254bd1b1f10ea6b85e2070/lijingjie1/s3ql_data_3
     2016-10-13 09:44:23.363 464:Thread-3
s3ql.backends.swift._do_request_inner: waiting for 100-continue
     2016-10-13 09:44:24.078 464:Thread-3
s3ql.backends.swift._do_request_inner: writing body data
     2016-10-13 09:44:24.666 464:Thread-6 s3ql.block_cache._do_upload:
_do_upload(2): uploaded 2048000000 bytes in 269.685 seconds, 7.24 MiB/s
     2016-10-13 09:44:24.796 464:Thread-6 s3ql.block_cache.get: waiting for
writer..
     2016-10-13 09:44:24.796 464:fuse-worker-19 s3ql.block_cache._get_entry:
started with 4, 0
     2016-10-13 09:44:24.796 464:Thread-4 s3ql.block_cache.get: waiting for
writer..
     2016-10-13 09:44:24.796 464:Thread-7 s3ql.block_cache.get: waiting for
writer..
     2016-10-13 09:44:24.796 464:Thread-8 s3ql.block_cache.get: waiting for
writer..
     2016-10-13 09:44:24.796 464:Thread-5 s3ql.block_cache.get: waiting for
writer..
     2016-10-13 09:44:26.767 464:fuse-worker-30 s3ql.fs.flush: started with
4
     2016-10-13 09:44:26.767 464:fuse-worker-1 s3ql.fs.release: started with
4
     2016-10-13 09:44:26.781 464:fuse-worker-2 s3ql.fs.releasedir: started
with 1
     2016-10-13 09:44:27.334 464:fuse-worker-6 s3ql.fs.getattr: started with
4
     2016-10-13 09:44:27.569 464:fuse-worker-3 s3ql.fs.getxattr: started
with 4, b'system.posix_acl_access'
     2016-10-13 09:44:27.980 464:fuse-worker-4 s3ql.fs.open: started with 4
     2016-10-13 09:44:27.980 464:fuse-worker-7 s3ql.fs.getxattr: started
with 4, b'system.posix_acl_access'
     2016-10-13 09:44:27.981 464:fuse-worker-5 s3ql.fs.getxattr: started
with 1, b'system.posix_acl_access'
     2016-10-13 09:44:27.981 464:fuse-worker-8 s3ql.fs.getxattr: started
with 1, b'system.posix_acl_default'
     2016-10-13 09:44:28.023 464:fuse-worker-9 s3ql.fs.read:
lijingjie########## started with 4, 0, 16384
     2016-10-13 09:44:28.024 464:fuse-worker-9 s3ql.block_cache._get_entry:
started with 4, 0
     2016-10-13 09:44:28.026 464:fuse-worker-10 s3ql.fs.read:
lijingjie########## started with 4, 2711764992, 8192
     2016-10-13 09:45:21.666 464:Thread-3 s3ql.block_cache._do_upload:
_do_upload(3): uploaded 663882958 bytes in 133.212 seconds, 4.75 MiB/s
   

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