On Sat, Jan 7, 2017 at 8:58 AM, Edward Shishkin
<edward.shishkin@xxxxxxxxx> wrote:
>
>
> On 01/07/2017 10:15 AM, Dušan Čolić wrote:
>>
>> On Sat, Jan 7, 2017 at 12:05 AM, Edward Shishkin
>> <edward.shishkin@xxxxxxxxx> wrote:
>>>
>>> On 01/07/2017 01:09 AM, Dušan Čolić wrote:
>>>>
>>>> On Fri, Jan 6, 2017 at 8:58 PM, Edward Shishkin
>>>> <edward.shishkin@xxxxxxxxx> wrote:
>>>>>
>>>>>
>>>>> On 01/06/2017 05:34 PM, Dušan Čolić wrote:
>>>>>>
>>>>>> On Fri, Jan 6, 2017 at 2:44 PM, Edward Shishkin
>>>>>> <edward.shishkin@xxxxxxxxx> wrote:
>>>>>>>
>>>>>>> On 12/26/2016 11:13 PM, Dušan Čolić wrote:
>>>>>>>>
>>>>>>>> On Mon, Dec 26, 2016 at 7:47 PM, Edward Shishkin
>>>>>>>> <edward.shishkin@xxxxxxxxx> wrote:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On 12/25/2016 02:59 AM, Dušan Čolić wrote:
>>>>>>>>>>
>>>>>>>>>> Fibration is a great way to decrease fragmentation and increase
>>>>>>>>>> throughput.
>>>>>>>>>> Currently there are 4 fibration plugins, lex, dot.o, ext_1 and
>>>>>>>>>> ext_3
>>>>>>>>>> and they all have their upsides and downsides.
>>>>>>>>>>
>>>>>>>>>> Proposed fibration plugin combines them all so that it combines
>>>>>>>>>> files
>>>>>>>>>> with same extensions for 1, 2. 3 and 4 character extension in
>>>>>>>>>> groups
>>>>>>>>>> and sorts them in same fiber group.
>>>>>>>>>>
>>>>>>>>>> With this fibration plugin all eg. xvid files would be in same
>>>>>>>>>> group
>>>>>>>>>> in folder on disk sorted alphabetically
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> What application wants all xvid files to be in the same group?
>>>>>>>>> Do you have any benchmark numbers which show advantages
>>>>>>>>> of the new plugin?
>>>>>>>>>
>>>>>>>> Xvid files are just an example.
>>>>>>>> ext_1234 fibration would be equal to sum of ext_1, ext_2, ext_3,
>>>>>>>> ext_4
>>>>>>>> and dot_o in one.
>>>>>>>>
>>>>>>>> In currently default plugin (dot_o) we sort all files by name from
>>>>>>>> the
>>>>>>>> start except .o files which we put at the end.
>>>>>>>> So if we had a source directory with .c .h and .o files in it files
>>>>>>>> by
>>>>>>>> extension would be sorted like: chchchchchchchchoooooooooooooo
>>>>>>>> I presumed that in some use cases it is better to have files be
>>>>>>>> sorted
>>>>>>>> ccccccccccchhhhhhhhhhhhhhoooooooooooo
>>>>>>>>
>>>>>>>> Hypothesis is to use the premise that files of same extension are in
>>>>>>>> same order of size to reduce fragmentation.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> What kind of fragmentation you are talking about?
>>>>>>> Internal (which results in "dead" disk space), or
>>>>>>> external (which results in a lot of "extents")?
>>>>>>>
>>>>>> External
>>>>>>
>>>>>>> Edward.
>>>>>>>
>>>>>>>
>>>>>>>> If we group files of same extension in groups in one directory, when
>>>>>>>> we write files of same extension after deletion of some files of one
>>>>>>>> extension their group would be in same order as the deleted file so
>>>>>>>> they would be written in similar place and occupy the 'hole' of
>>>>>>>> similar size.
>>>>>
>>>>>
>>>>>
>>>>> So "similar" means the same order, that is file sizes can differ in 2
>>>>> times?
>>>>> TBH, I don't see what can be deduced from this assumption ;)
>>>>> It can happen that new file either doesn't fit to that hole, or
>>>>> occupies
>>>>> too
>>>>> small place, so that next file won't fit to the rest of the hole..
>>>>>
>>>> OFC we can never guarantee that the new file completely fits the hole
>>>> (especially as we go through compression in next layer) but for both
>>>> smaller and larger file than a hole we would have higher probability
>>>> for less extents for situations with 2 or more types of files in a
>>>> directory. For one type of file in a directory behavior would be the
>>>> same as dot_o and ext_1 plugin.
>>>
>>>
>>>
>>> I should upset you: fibration plugins are about mapping of a semantic
>>> tree to the storage tree. Simply speaking, they manage mapping
>>> object-> key, which has nothing common with real locations on diТак ты
>>> уже не ищешь? sk.
>>>
>>> This is a block allocator, who assigns disk addresses to nodes of the
>>> storage tree (right before writing them to disk at flush time).
>>> And I am sure that block allocator doesn't care about fibration groups.
>>>
>>> I strongly not recommend you to experiment with block allocator.
>>> Simply because I know how many people killed a lot of time without
>>> results.
>>
>> Then what is this comment in the beginning of kassign.c about:
>>
>>
>> * In reiser4 every piece of file system data and meta-data has a key. Keys
>> * are used to store information in and retrieve it from reiser4 internal
>> * tree. In addition to this, keys define _ordering_ of all file system
>> * information: things having close keys are placed into the same or
>> * neighboring (in the tree order) nodes of the tree. As our block
>> allocator
>> * tries to respect tree order (see flush.c), keys also define order in
>> which
>> * things are laid out on the disk, and hence, affect performance directly.
>
>
> I can not find where in the code block allocator respects key ordering.
> Once you find it, then let me know..
>
Let me prove it in a way that is possible for me without investing
years in learning R4 internals ;)
krshina3 test # mkfs.reiser4 -o create=reg40,fibration=ext_1_fibre /dev/md123
krshina3 test # ls -la /home/dusan/test/
total 261
drwxr-xr-x 2 root root 6 Jan 7 17:51 .
drwxr-xr-x 46 dusan dusan 73 Jan 7 17:48 ..
-rw-r--r-- 1 root root 4096 Jan 7 17:49 1.a
-rw-r--r-- 1 root root 8192 Jan 7 17:49 2.b
-rw-r--r-- 1 root root 12288 Jan 7 17:50 3.a
-rw-r--r-- 1 root root 16384 Jan 7 17:51 4.b
krshina3 test # mount /dev/md123 /mnt/test
krshina3 test # cp /home/dusan/test/* /mnt/test
krshina3 test # umount /dev/md123
krshina3 test # debugfs.reiser4 -t /dev/md123
debugfs.reiser4 1.1.0
Format release: 4.0.1
Copyright (C) 2001-2005 by Hans Reiser, licensing governed by
reiser4progs/COPYING.
NODE (25) LEVEL=2 ITEMS=11 SPACE=3562 MKFS ID=0x51a268e2 FLUSH=0x0
#0 NPTR (nodeptr40): [29:1(SD):0:2a:0] OFF=28, LEN=8, flags=0x0 [24]
------------------------------------------------------------------------------
#1 NPTR (nodeptr40): [2a:4(FB):c2312e6100000000:10000:c6e] OFF=36,
LEN=8, flags=0x0 [26]
------------------------------------------------------------------------------
#2 NPTR (nodeptr40): [2a:4(FB):c2332e6100000000:10002:c06] OFF=44,
LEN=8, flags=0x0 [27]
------------------------------------------------------------------------------
#3 NPTR (nodeptr40): [2a:4(FB):c2332e6100000000:10002:1bc4] OFF=52,
LEN=8, flags=0x0 [28]
------------------------------------------------------------------------------
#4 NPTR (nodeptr40): [2a:4(FB):c2332e6100000000:10002:2b82] OFF=60,
LEN=8, flags=0x0 [29]
------------------------------------------------------------------------------
#5 NPTR (nodeptr40): [2a:4(FB):c4322e6200000000:10001:b1a] OFF=68,
LEN=8, flags=0x0 [30]
------------------------------------------------------------------------------
#6 NPTR (nodeptr40): [2a:4(FB):c4322e6200000000:10001:1ad8] OFF=76,
LEN=8, flags=0x0 [31]
------------------------------------------------------------------------------
#7 NPTR (nodeptr40): [2a:4(FB):c4342e6200000000:10003:a70] OFF=84,
LEN=8, flags=0x0 [32]
------------------------------------------------------------------------------
#8 NPTR (nodeptr40): [2a:4(FB):c4342e6200000000:10003:1a2e] OFF=92,
LEN=8, flags=0x0 [33]
------------------------------------------------------------------------------
#9 NPTR (nodeptr40): [2a:4(FB):c4342e6200000000:10003:29ec] OFF=100,
LEN=8, flags=0x0 [34]
------------------------------------------------------------------------------
#10 NPTR (nodeptr40): [2a:4(FB):c4342e6200000000:10003:39aa] OFF=108,
LEN=8, flags=0x0 [35]
==============================================================================
NODE (24) LEVEL=1 ITEMS=7 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 SD (stat40): [29:1(SD):0:2a:0] OFF=28, LEN=94, flags=0x0
exts: 3
mask: 0x13
plugin: sdext_lw
offset: 2
len: 14
mode: drwxr-xr-x
nlink: 3
size: 6
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 17:59:37 2017
mtime: Sat Jan 7 18:03:59 2017
ctime: Sat Jan 7 18:03:59 2017
rdev: 300
bytes: 300
plugin: sdext_plugin_set
offset: 44
len: 50
Pset count: 12
permission : id = 0
formatting : id = 2 (smart)
hash : id = 1 (r5_hash)
fibration : id = 2 (ext_1_fibre)
statdata : id = 0 (stat40)
diritem : id = 2 (cde40)
crypto : id = 0
digest : id = 0
compress : id = 0 (lzo1)
compressMode : id = 4 (conv)
cluster : id = 0 (64K)
create : id = 0 (reg40)
------------------------------------------------------------------------------
#1 DIRITEM (cde40): [2a:0(NAME):0:0:0] OFF=122, LEN=302, flags=0x0
NR(6) NAME OFFSET HASH
SDKEY
0 . 158
0000000000000000:0000000000000000 0000291:000002a
1 .. 182
0000000000000000:0000000000000000 0000291:000002a
2 1.a 206
0000000000000000:0000000000000000 00002a1:0010000
3 3.a 230
0000000000000000:0000000000000000 00002a1:0010002
4 2.b 254
0000000000000000:0000000000000000 00002a1:0010001
5 4.b 278
0000000000000000:0000000000000000 00002a1:0010003
------------------------------------------------------------------------------
#2 SD (stat40): [2a:1(SD):c2312e6100000000:10000:0] OFF=424, LEN=56, flags=0x0
exts: 3
mask: 0x7
plugin: sdext_lw
offset: 2
len: 14
mode: -rw-r--r--
nlink: 1
size: 4096
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 18:03:59 2017
mtime: Sat Jan 7 18:03:59 2017
ctime: Sat Jan 7 18:03:59 2017
rdev: 4096
bytes: 4096
plugin: sdext_lt
offset: 44
len: 12
atime: 652286102
mtime: 652286102
ctime: 652286102
------------------------------------------------------------------------------
#3 SD (stat40): [2a:1(SD):c2332e6100000000:10002:0] OFF=480, LEN=56, flags=0x0
exts: 3
mask: 0x7
plugin: sdext_lw
offset: 2
len: 14
mode: -rw-r--r--
nlink: 1
size: 12288
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 18:03:59 2017
mtime: Sat Jan 7 18:03:59 2017
ctime: Sat Jan 7 18:03:59 2017
rdev: 12288
bytes: 12288
plugin: sdext_lt
offset: 44
len: 12
atime: 656286256
mtime: 656286256
ctime: 656286256
------------------------------------------------------------------------------
#4 SD (stat40): [2a:1(SD):c4322e6200000000:10001:0] OFF=536, LEN=56, flags=0x0
exts: 3
mask: 0x7
plugin: sdext_lw
offset: 2
len: 14
mode: -rw-r--r--
nlink: 1
size: 8192
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 18:03:59 2017
mtime: Sat Jan 7 18:03:59 2017
ctime: Sat Jan 7 18:03:59 2017
rdev: 8192
bytes: 8192
plugin: sdext_lt
offset: 44
len: 12
atime: 652286102
mtime: 656286256
ctime: 656286256
------------------------------------------------------------------------------
#5 SD (stat40): [2a:1(SD):c4342e6200000000:10003:0] OFF=592, LEN=56, flags=0x0
exts: 3
mask: 0x7
plugin: sdext_lw
offset: 2
len: 14
mode: -rw-r--r--
nlink: 1
size: 16384
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 18:03:59 2017
mtime: Sat Jan 7 18:03:59 2017
ctime: Sat Jan 7 18:03:59 2017
rdev: 16384
bytes: 16384
plugin: sdext_lt
offset: 44
len: 12
atime: 656286256
mtime: 656286256
ctime: 656286256
------------------------------------------------------------------------------
#6 TAIL (plain40): [2a:4(FB):c2312e6100000000:10000:0] OFF=648,
LEN=3182, flags=0x0
==============================================================================
NODE (26) LEVEL=1 ITEMS=2 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c2312e6100000000:10000:c6e] OFF=28,
LEN=914, flags=0x0
------------------------------------------------------------------------------
#1 TAIL (plain40): [2a:4(FB):c2332e6100000000:10002:0] OFF=942,
LEN=3078, flags=0x0
==============================================================================
NODE (27) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c2332e6100000000:10002:c06] OFF=28,
LEN=4030, flags=0x0
==============================================================================
NODE (28) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c2332e6100000000:10002:1bc4] OFF=28,
LEN=4030, flags=0x50
==============================================================================
NODE (29) LEVEL=1 ITEMS=2 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c2332e6100000000:10002:2b82] OFF=28,
LEN=1150, flags=0x54
------------------------------------------------------------------------------
#1 TAIL (plain40): [2a:4(FB):c4322e6200000000:10001:0] OFF=1178,
LEN=2842, flags=0x0
==============================================================================
NODE (30) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c4322e6200000000:10001:b1a] OFF=28,
LEN=4030, flags=0x0
==============================================================================
NODE (31) LEVEL=1 ITEMS=2 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c4322e6200000000:10001:1ad8] OFF=28,
LEN=1320, flags=0x0
------------------------------------------------------------------------------
#1 TAIL (plain40): [2a:4(FB):c4342e6200000000:10003:0] OFF=1348,
LEN=2672, flags=0x0
==============================================================================
NODE (32) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c4342e6200000000:10003:a70] OFF=28,
LEN=4030, flags=0x0
==============================================================================
NODE (33) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c4342e6200000000:10003:1a2e] OFF=28,
LEN=4030, flags=0x63
==============================================================================
NODE (34) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c4342e6200000000:10003:29ec] OFF=28,
LEN=4030, flags=0xbf
==============================================================================
NODE (35) LEVEL=1 ITEMS=1 SPACE=2408 MKFS ID=0x51a268e2 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):c4342e6200000000:10003:39aa] OFF=28,
LEN=1622, flags=0x1b7
==============================================================================
krshina3 test # mkfs.reiser4 -o create=reg40,fibration=dot_o_fibre /dev/md123
krshina3 test # mount /dev/md123 /mnt/test
krshina3 test # cp /home/dusan/test/* /mnt/test
krshina3 test # umount /dev/md123
krshina3 test # debugfs.reiser4 -t /dev/md123
debugfs.reiser4 1.1.0
Format release: 4.0.1
Copyright (C) 2001-2005 by Hans Reiser, licensing governed by
reiser4progs/COPYING.
NODE (25) LEVEL=2 ITEMS=11 SPACE=3562 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 NPTR (nodeptr40): [29:1(SD):0:2a:0] OFF=28, LEN=8, flags=0x0 [24]
------------------------------------------------------------------------------
#1 NPTR (nodeptr40): [2a:4(FB):312e6100000000:10000:c6e] OFF=36,
LEN=8, flags=0x0 [26]
------------------------------------------------------------------------------
#2 NPTR (nodeptr40): [2a:4(FB):322e6200000000:10001:c06] OFF=44,
LEN=8, flags=0x0 [27]
------------------------------------------------------------------------------
#3 NPTR (nodeptr40): [2a:4(FB):322e6200000000:10001:1bc4] OFF=52,
LEN=8, flags=0x0 [28]
------------------------------------------------------------------------------
#4 NPTR (nodeptr40): [2a:4(FB):332e6100000000:10002:b5c] OFF=60,
LEN=8, flags=0x0 [29]
------------------------------------------------------------------------------
#5 NPTR (nodeptr40): [2a:4(FB):332e6100000000:10002:1b1a] OFF=68,
LEN=8, flags=0x0 [30]
------------------------------------------------------------------------------
#6 NPTR (nodeptr40): [2a:4(FB):332e6100000000:10002:2ad8] OFF=76,
LEN=8, flags=0x0 [31]
------------------------------------------------------------------------------
#7 NPTR (nodeptr40): [2a:4(FB):342e6200000000:10003:a70] OFF=84,
LEN=8, flags=0x0 [32]
------------------------------------------------------------------------------
#8 NPTR (nodeptr40): [2a:4(FB):342e6200000000:10003:1a2e] OFF=92,
LEN=8, flags=0x0 [33]
------------------------------------------------------------------------------
#9 NPTR (nodeptr40): [2a:4(FB):342e6200000000:10003:29ec] OFF=100,
LEN=8, flags=0x0 [34]
------------------------------------------------------------------------------
#10 NPTR (nodeptr40): [2a:4(FB):342e6200000000:10003:39aa] OFF=108,
LEN=8, flags=0x0 [35]
==============================================================================
NODE (24) LEVEL=1 ITEMS=7 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 SD (stat40): [29:1(SD):0:2a:0] OFF=28, LEN=94, flags=0x0
exts: 3
mask: 0x13
plugin: sdext_lw
offset: 2
len: 14
mode: drwxr-xr-x
nlink: 3
size: 6
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 18:05:26 2017
mtime: Sat Jan 7 18:06:31 2017
ctime: Sat Jan 7 18:06:31 2017
rdev: 300
bytes: 300
plugin: sdext_plugin_set
offset: 44
len: 50
Pset count: 12
permission : id = 0
formatting : id = 2 (smart)
hash : id = 1 (r5_hash)
fibration : id = 1 (dot_o_fibre)
statdata : id = 0 (stat40)
diritem : id = 2 (cde40)
crypto : id = 0
digest : id = 0
compress : id = 0 (lzo1)
compressMode : id = 4 (conv)
cluster : id = 0 (64K)
create : id = 0 (reg40)
------------------------------------------------------------------------------
#1 DIRITEM (cde40): [2a:0(NAME):0:0:0] OFF=122, LEN=302, flags=0x0
NR(6) NAME OFFSET HASH
SDKEY
0 . 158
0000000000000000:0000000000000000 0000291:000002a
1 .. 182
0000000000000000:0000000000000000 0000291:000002a
2 1.a 206
0000000000000000:0000000000000000 00002a1:0010000
3 2.b 230
0000000000000000:0000000000000000 00002a1:0010001
4 3.a 254
0000000000000000:0000000000000000 00002a1:0010002
5 4.b 278
0000000000000000:0000000000000000 00002a1:0010003
------------------------------------------------------------------------------
#2 SD (stat40): [2a:1(SD):312e6100000000:10000:0] OFF=424, LEN=56, flags=0x0
exts: 3
mask: 0x7
plugin: sdext_lw
offset: 2
len: 14
mode: -rw-r--r--
nlink: 1
size: 4096
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 18:06:31 2017
mtime: Sat Jan 7 18:06:31 2017
ctime: Sat Jan 7 18:06:31 2017
rdev: 4096
bytes: 4096
plugin: sdext_lt
offset: 44
len: 12
atime: 778212799
mtime: 778212799
ctime: 778212799
------------------------------------------------------------------------------
#3 SD (stat40): [2a:1(SD):322e6200000000:10001:0] OFF=480, LEN=56, flags=0x0
exts: 3
mask: 0x7
plugin: sdext_lw
offset: 2
len: 14
mode: -rw-r--r--
nlink: 1
size: 8192
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 18:06:31 2017
mtime: Sat Jan 7 18:06:31 2017
ctime: Sat Jan 7 18:06:31 2017
rdev: 8192
bytes: 8192
plugin: sdext_lt
offset: 44
len: 12
atime: 778212799
mtime: 778212799
ctime: 778212799
------------------------------------------------------------------------------
#4 SD (stat40): [2a:1(SD):332e6100000000:10002:0] OFF=536, LEN=56, flags=0x0
exts: 3
mask: 0x7
plugin: sdext_lw
offset: 2
len: 14
mode: -rw-r--r--
nlink: 1
size: 12288
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 18:06:31 2017
mtime: Sat Jan 7 18:06:31 2017
ctime: Sat Jan 7 18:06:31 2017
rdev: 12288
bytes: 12288
plugin: sdext_lt
offset: 44
len: 12
atime: 782212955
mtime: 782212955
ctime: 782212955
------------------------------------------------------------------------------
#5 SD (stat40): [2a:1(SD):342e6200000000:10003:0] OFF=592, LEN=56, flags=0x0
exts: 3
mask: 0x7
plugin: sdext_lw
offset: 2
len: 14
mode: -rw-r--r--
nlink: 1
size: 16384
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Sat Jan 7 18:06:31 2017
mtime: Sat Jan 7 18:06:31 2017
ctime: Sat Jan 7 18:06:31 2017
rdev: 16384
bytes: 16384
plugin: sdext_lt
offset: 44
len: 12
atime: 782212955
mtime: 782212955
ctime: 782212955
------------------------------------------------------------------------------
#6 TAIL (plain40): [2a:4(FB):312e6100000000:10000:0] OFF=648,
LEN=3182, flags=0x0
==============================================================================
NODE (26) LEVEL=1 ITEMS=2 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):312e6100000000:10000:c6e] OFF=28,
LEN=914, flags=0x0
------------------------------------------------------------------------------
#1 TAIL (plain40): [2a:4(FB):322e6200000000:10001:0] OFF=942,
LEN=3078, flags=0x0
==============================================================================
NODE (27) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):322e6200000000:10001:c06] OFF=28,
LEN=4030, flags=0x0
==============================================================================
NODE (28) LEVEL=1 ITEMS=2 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):322e6200000000:10001:1bc4] OFF=28,
LEN=1084, flags=0x0
------------------------------------------------------------------------------
#1 TAIL (plain40): [2a:4(FB):332e6100000000:10002:0] OFF=1112,
LEN=2908, flags=0x0
==============================================================================
NODE (29) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):332e6100000000:10002:b5c] OFF=28,
LEN=4030, flags=0x0
==============================================================================
NODE (30) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):332e6100000000:10002:1b1a] OFF=28,
LEN=4030, flags=0xc
==============================================================================
NODE (31) LEVEL=1 ITEMS=2 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):332e6100000000:10002:2ad8] OFF=28,
LEN=1320, flags=0x1cf
------------------------------------------------------------------------------
#1 TAIL (plain40): [2a:4(FB):342e6200000000:10003:0] OFF=1348,
LEN=2672, flags=0x0
==============================================================================
NODE (32) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):342e6200000000:10003:a70] OFF=28,
LEN=4030, flags=0x0
==============================================================================
NODE (33) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):342e6200000000:10003:1a2e] OFF=28,
LEN=4030, flags=0x21
==============================================================================
NODE (34) LEVEL=1 ITEMS=1 SPACE=0 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):342e6200000000:10003:29ec] OFF=28,
LEN=4030, flags=0x1cf
==============================================================================
NODE (35) LEVEL=1 ITEMS=1 SPACE=2408 MKFS ID=0x1bb9bd27 FLUSH=0x0
#0 TAIL (plain40): [2a:4(FB):342e6200000000:10003:39aa] OFF=28,
LEN=1622, flags=0x16
==============================================================================
As we can see with ext_1_fibre files were sorted:
1.a
3.a
2.b
4.b
With dot_o_fibre:
1.a
2.b
3.a
4.b
> Thanks,
> Edward.
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