[linux-lvm] How Can I modify the mapping PE to LE??
조완근
jowkju at postech.ac.kr
Wed Jun 7 13:13:39 UTC 2006
Hello, I'm at the beginning to use LVM in my machine.
Could you give any information on the implementation details of LVM and
device mapper?? More specifically, I want to change the "mapping between PE and
LE" for some purposes, however I'm just finished to read the manual of
LVM-HowTO. This means that I'm totally a newbie in LVM and device-mapper. I
just read some codes on data
structures in LVM2/lib/metadata/metadata.h, but I can't get more
information anymore on how they are mapped.
I was hanging around the codes in LVM2 source to find the part related
with the "mapping", I just got to know the mapping information is stored in
device mapper, not in the LVM.
I'll use LVM for this purpose - I would like to make a program
to change the mapping relationship between PE and LE in my own. In
fact, the program's goal is to move an extent in a bad disk to a disk with
good performance. The movement is done by the extent. In order to do it, I
definitely, have to know how I can modify the mapping and maybe, the entire
structure of LVM and device mapper.
Could you give me some information on LVM & device-mapper details that
help me??
- exactly all about the mapping between LE & PE..
I'm totally at the beginning, I'm well prepared to dig in the codes from now
on, does anyone can help me to run faster??
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