* e4defrag don't work really well
@ 2023-02-12 18:14 Reindl Harald
2023-02-16 16:50 ` Eric Sandeen
0 siblings, 1 reply; 5+ messages in thread
From: Reindl Harald @ 2023-02-12 18:14 UTC (permalink / raw)
To: linux-ext4
what's wrong with e4defrag that it pretends it reduced th efragments of
a file to 1 while in the next "e4defrag -c" (why does that only list 5
files at all) the same file is listed again with the same old frag count?
----------------------------
[root@srv-rhsoft:~]$ e4defrag -c /mnt/data/audio/
e4defrag 1.46.5 (30-Dec-2021)
<Fragmented files> now/best size/ext
1. /mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3
3/1 2389 KB
2. /mnt/data/audio/Ace Frehley/Second Sighting/Ace Frehley - Fallen
Angel.mp3
3/1 2389 KB
3. /mnt/data/audio/Mr. Big/Defying Gravity/Mr. Big - Mean To Me.mp3
3/1 2389 KB
4. /mnt/data/audio/Juice Newton/Quiet Lies/Juice Newton - Im Gonna Be
Strong.mp3
3/1 2389 KB
5. /mnt/data/audio/Vicious Rumors/Something Burning/Vicious Rumors -
Ballhog.mp3
3/1 2389 KB
----------------------------
[root@srv-rhsoft:~]$ e4defrag "/mnt/data/audio/Smokie/Solid
Ground/Smokie - Little Town Flirt.mp3"
e4defrag 1.46.5 (30-Dec-2021)
ext4 defragmentation for /mnt/data/audio/Smokie/Solid Ground/Smokie -
Little Town Flirt.mp3
[1/1]/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3:
100% [ OK ]
Success: [1/1]
----------------------------
[root@srv-rhsoft:~]$ e4defrag -c /mnt/data/audio/
e4defrag 1.46.5 (30-Dec-2021)
<Fragmented files> now/best size/ext
1. /mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3
3/1 2389 KB
2. /mnt/data/audio/Ace Frehley/Second Sighting/Ace Frehley - Fallen
Angel.mp3
3/1 2389 KB
3. /mnt/data/audio/Mr. Big/Defying Gravity/Mr. Big - Mean To Me.mp3
3/1 2389 KB
4. /mnt/data/audio/Juice Newton/Quiet Lies/Juice Newton - Im Gonna Be
Strong.mp3
3/1 2389 KB
5. /mnt/data/audio/Vicious Rumors/Something Burning/Vicious Rumors -
Ballhog.mp3
3/1 2389 KB
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: e4defrag don't work really well
2023-02-12 18:14 e4defrag don't work really well Reindl Harald
@ 2023-02-16 16:50 ` Eric Sandeen
2023-02-16 18:21 ` Reindl Harald
0 siblings, 1 reply; 5+ messages in thread
From: Eric Sandeen @ 2023-02-16 16:50 UTC (permalink / raw)
To: Reindl Harald, linux-ext4
On 2/12/23 12:14 PM, Reindl Harald wrote:
>
> what's wrong with e4defrag that it pretends it reduced th efragments of a file to 1 while in the next "e4defrag -c" (why does that only list 5 files at all) the same file is listed again with the same old frag count?
You might want to examine the actual allocation before and after with "filefrag -v"
which could offer some clues to whether anything was modified by e4defrag.
(I would also suggest that there is no need to defragment a 3-extent 2 megabyte
file, in general.)
-Eric
> ----------------------------
>
> [root@srv-rhsoft:~]$ e4defrag -c /mnt/data/audio/
> e4defrag 1.46.5 (30-Dec-2021)
> <Fragmented files> now/best size/ext
> 1. /mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3
> 3/1 2389 KB
> 2. /mnt/data/audio/Ace Frehley/Second Sighting/Ace Frehley - Fallen Angel.mp3
> 3/1 2389 KB
> 3. /mnt/data/audio/Mr. Big/Defying Gravity/Mr. Big - Mean To Me.mp3
> 3/1 2389 KB
> 4. /mnt/data/audio/Juice Newton/Quiet Lies/Juice Newton - Im Gonna Be Strong.mp3
> 3/1 2389 KB
> 5. /mnt/data/audio/Vicious Rumors/Something Burning/Vicious Rumors - Ballhog.mp3
> 3/1 2389 KB
>
> ----------------------------
>
> [root@srv-rhsoft:~]$ e4defrag "/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3"
> e4defrag 1.46.5 (30-Dec-2021)
> ext4 defragmentation for /mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3
> [1/1]/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3: 100% [ OK ]
> Success: [1/1]
>
> ----------------------------
>
> [root@srv-rhsoft:~]$ e4defrag -c /mnt/data/audio/
> e4defrag 1.46.5 (30-Dec-2021)
> <Fragmented files> now/best size/ext
> 1. /mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3
> 3/1 2389 KB
> 2. /mnt/data/audio/Ace Frehley/Second Sighting/Ace Frehley - Fallen Angel.mp3
> 3/1 2389 KB
> 3. /mnt/data/audio/Mr. Big/Defying Gravity/Mr. Big - Mean To Me.mp3
> 3/1 2389 KB
> 4. /mnt/data/audio/Juice Newton/Quiet Lies/Juice Newton - Im Gonna Be Strong.mp3
> 3/1 2389 KB
> 5. /mnt/data/audio/Vicious Rumors/Something Burning/Vicious Rumors - Ballhog.mp3
> 3/1 2389 KB
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: e4defrag don't work really well
2023-02-16 16:50 ` Eric Sandeen
@ 2023-02-16 18:21 ` Reindl Harald
2023-02-16 19:56 ` Eric Sandeen
0 siblings, 1 reply; 5+ messages in thread
From: Reindl Harald @ 2023-02-16 18:21 UTC (permalink / raw)
To: Eric Sandeen, linux-ext4
Am 16.02.23 um 17:50 schrieb Eric Sandeen:
> On 2/12/23 12:14 PM, Reindl Harald wrote:
>>
>> what's wrong with e4defrag that it pretends it reduced th efragments of a file to 1 while in the next "e4defrag -c" (why does that only list 5 files at all) the same file is listed again with the same old frag count?
>
> You might want to examine the actual allocation before and after with "filefrag -v"
> which could offer some clues to whether anything was modified by e4defrag.
>
> (I would also suggest that there is no need to defragment a 3-extent 2 megabyte
> file, in general.)
it's not a question if it's needed
the point is it pretends "Success: [1/1]" but a following "e4defrag -c"
still says "now/best 3/1"
>> ----------------------------
>>
>> [root@srv-rhsoft:~]$ e4defrag -c /mnt/data/audio/
>> e4defrag 1.46.5 (30-Dec-2021)
>> <Fragmented files> now/best size/ext
>> 1. /mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3
>> 3/1 2389 KB
>> 2. /mnt/data/audio/Ace Frehley/Second Sighting/Ace Frehley - Fallen Angel.mp3
>> 3/1 2389 KB
>> 3. /mnt/data/audio/Mr. Big/Defying Gravity/Mr. Big - Mean To Me.mp3
>> 3/1 2389 KB
>> 4. /mnt/data/audio/Juice Newton/Quiet Lies/Juice Newton - Im Gonna Be Strong.mp3
>> 3/1 2389 KB
>> 5. /mnt/data/audio/Vicious Rumors/Something Burning/Vicious Rumors - Ballhog.mp3
>> 3/1 2389 KB
>>
>> ----------------------------
>>
>> [root@srv-rhsoft:~]$ e4defrag "/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3"
>> e4defrag 1.46.5 (30-Dec-2021)
>> ext4 defragmentation for /mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3
>> [1/1]/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3: 100% [ OK ]
>> Success: [1/1]
>>
>> ----------------------------
>>
>> [root@srv-rhsoft:~]$ e4defrag -c /mnt/data/audio/
>> e4defrag 1.46.5 (30-Dec-2021)
>> <Fragmented files> now/best size/ext
>> 1. /mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3
>> 3/1 2389 KB
>> 2. /mnt/data/audio/Ace Frehley/Second Sighting/Ace Frehley - Fallen Angel.mp3
>> 3/1 2389 KB
>> 3. /mnt/data/audio/Mr. Big/Defying Gravity/Mr. Big - Mean To Me.mp3
>> 3/1 2389 KB
>> 4. /mnt/data/audio/Juice Newton/Quiet Lies/Juice Newton - Im Gonna Be Strong.mp3
>> 3/1 2389 KB
>> 5. /mnt/data/audio/Vicious Rumors/Something Burning/Vicious Rumors - Ballhog.mp3
>> 3/1 2389 KB
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: e4defrag don't work really well
2023-02-16 18:21 ` Reindl Harald
@ 2023-02-16 19:56 ` Eric Sandeen
2023-02-16 20:35 ` Reindl Harald
0 siblings, 1 reply; 5+ messages in thread
From: Eric Sandeen @ 2023-02-16 19:56 UTC (permalink / raw)
To: Reindl Harald, linux-ext4
On 2/16/23 12:21 PM, Reindl Harald wrote:
>
>
> Am 16.02.23 um 17:50 schrieb Eric Sandeen:
>> On 2/12/23 12:14 PM, Reindl Harald wrote:
>>>
>>> what's wrong with e4defrag that it pretends it reduced th efragments of a file to 1 while in the next "e4defrag -c" (why does that only list 5 files at all) the same file is listed again with the same old frag count?
>>
>> You might want to examine the actual allocation before and after with "filefrag -v"
>> which could offer some clues to whether anything was modified by e4defrag.
>>
>> (I would also suggest that there is no need to defragment a 3-extent 2 megabyte
>> file, in general.)
>
> it's not a question if it's needed
>
> the point is it pretends "Success: [1/1]" but a following "e4defrag -c" still says "now/best 3/1"
I understand. It seems that your irritation at my parenthetical caused you
to skip over the request for more information from filefrag, though.
-Eric
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: e4defrag don't work really well
2023-02-16 19:56 ` Eric Sandeen
@ 2023-02-16 20:35 ` Reindl Harald
0 siblings, 0 replies; 5+ messages in thread
From: Reindl Harald @ 2023-02-16 20:35 UTC (permalink / raw)
To: linux-ext4
Am 16.02.23 um 20:56 schrieb Eric Sandeen:
> On 2/16/23 12:21 PM, Reindl Harald wrote:
>>
>> Am 16.02.23 um 17:50 schrieb Eric Sandeen:
>>> On 2/12/23 12:14 PM, Reindl Harald wrote:
>>>>
>>>> what's wrong with e4defrag that it pretends it reduced th efragments of a file to 1 while in the next "e4defrag -c" (why does that only list 5 files at all) the same file is listed again with the same old frag count?
>>>
>>> You might want to examine the actual allocation before and after with "filefrag -v"
>>> which could offer some clues to whether anything was modified by e4defrag.
>>>
>>> (I would also suggest that there is no need to defragment a 3-extent 2 megabyte
>>> file, in general.)
>>
>> it's not a question if it's needed
>>
>> the point is it pretends "Success: [1/1]" but a following "e4defrag -c" still says "now/best 3/1"
>
> I understand. It seems that your irritation at my parenthetical caused you
> to skip over the request for more information from filefrag, though
wehn you call e4defrag *multiple* times it seems to have the expected
result - erratic operations like this are terrible
also why it's operating over files with already only 1 xtend is also a
mircale for me - it takes ages to run it over a folder with some hundret
MB and seems to rewrite each and every file
-----------------
BTW: it's a bad idea that your personal address forwards to gmail -
google is rejecting any forwarded mail from a proper configured domain
using SPF
[root@srv-rhsoft:~]$ filefrag "/mnt/data/audio/Smokie/Solid
Ground/Smokie - Little Town Flirt.mp3"
/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3: 3
extents found
[root@srv-rhsoft:~]$ e4defrag "/mnt/data/audio/Smokie/Solid
Ground/Smokie - Little Town Flirt.mp3"
e4defrag 1.46.5 (30-Dec-2021)
ext4 defragmentation for /mnt/data/audio/Smokie/Solid Ground/Smokie -
Little Town Flirt.mp3
[1/1]/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3:
100% [ OK ]
Success: [1/1]
[root@srv-rhsoft:~]$ filefrag "/mnt/data/audio/Smokie/Solid
Ground/Smokie - Little Town Flirt.mp3"
/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3: 2
extents found
[root@srv-rhsoft:~]$ e4defrag "/mnt/data/audio/Smokie/Solid
Ground/Smokie - Little Town Flirt.mp3"
e4defrag 1.46.5 (30-Dec-2021)
ext4 defragmentation for /mnt/data/audio/Smokie/Solid Ground/Smokie -
Little Town Flirt.mp3
[1/1]/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3:
100% [ OK ]
Success: [1/1]
[root@srv-rhsoft:~]$ filefrag "/mnt/data/audio/Smokie/Solid
Ground/Smokie - Little Town Flirt.mp3"
/mnt/data/audio/Smokie/Solid Ground/Smokie - Little Town Flirt.mp3: 1
extent found
^ permalink raw reply [flat|nested] 5+ messages in thread
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2023-02-12 18:14 e4defrag don't work really well Reindl Harald
2023-02-16 16:50 ` Eric Sandeen
2023-02-16 18:21 ` Reindl Harald
2023-02-16 19:56 ` Eric Sandeen
2023-02-16 20:35 ` Reindl Harald
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