* help regarding ext4 extend and multiblock allocation
@ 2011-12-29 3:42 Swapnil Gaikwad
2011-12-29 11:52 ` Mulyadi Santosa
2012-01-04 23:24 ` Greg Freemyer
0 siblings, 2 replies; 3+ messages in thread
From: Swapnil Gaikwad @ 2011-12-29 3:42 UTC (permalink / raw)
To: kernelnewbies
How the extend is different from block allocation?
How it is implemented in ext4?
How helpful the multiblock allocation in ext4?
Is there is some special cases than ext3 that handled in ext4 for above.
--
Regards,
Swapnil Gaikwad.
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* help regarding ext4 extend and multiblock allocation
2011-12-29 3:42 help regarding ext4 extend and multiblock allocation Swapnil Gaikwad
@ 2011-12-29 11:52 ` Mulyadi Santosa
2012-01-04 23:24 ` Greg Freemyer
1 sibling, 0 replies; 3+ messages in thread
From: Mulyadi Santosa @ 2011-12-29 11:52 UTC (permalink / raw)
To: kernelnewbies
Hi Swapnil...
On Thu, Dec 29, 2011 at 10:42, Swapnil Gaikwad <swapnilgaik72@gmail.com> wrote:
> How the extend is different from block allocation?
The way I see extent is: it's like doing cluster allocation. Meaning,
you don't allocate it one by one, but as a whole.
For example, with extent size 1 MB and block size 4 KB, it means
filesystem allocate 256 blocks at once.
Although it sounds like multi block allocation or read ahead, I think
the underlying implementation is a bit different. Sorry, this is the
best I know
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
^ permalink raw reply [flat|nested] 3+ messages in thread
* help regarding ext4 extend and multiblock allocation
2011-12-29 3:42 help regarding ext4 extend and multiblock allocation Swapnil Gaikwad
2011-12-29 11:52 ` Mulyadi Santosa
@ 2012-01-04 23:24 ` Greg Freemyer
1 sibling, 0 replies; 3+ messages in thread
From: Greg Freemyer @ 2012-01-04 23:24 UTC (permalink / raw)
To: kernelnewbies
On Wed, Dec 28, 2011 at 10:42 PM, Swapnil Gaikwad
<swapnilgaik72@gmail.com> wrote:
> How the extend is different from block allocation?
> How it is implemented in ext4?
> How helpful the multiblock allocation in ext4?
> Is there is some special cases than ext3 that handled in ext4 for above.
Have you read the kernelnewbies page on ext4:
http://kernelnewbies.org/Ext4
After you read that, quote the paragraph you don't understand and ask again.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2011-12-29 3:42 help regarding ext4 extend and multiblock allocation Swapnil Gaikwad
2011-12-29 11:52 ` Mulyadi Santosa
2012-01-04 23:24 ` Greg Freemyer
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