[linux-lvm] LVM2: problems with snapshots
Micha Holzmann
holzmann at gmx.de
Thu Jul 21 07:21:34 UTC 2005
Hello all,
i am new with LVM and related topics. After reading the Linux LVM howto
i decided to use lvm an a machine which serves different data for our
users.
After using it for a while i came to this site:
http://c.mills.ctru.auckland.ac.nz/Samba/XfsAclWinAuth.html
Inspired from the details to the "MicroBackups", i intend to do the
same. I customized the script to fit our needs.
I create the directories /mnt/snapshots/{data,home} and want to have that every half
hour from 7am until 7pm a snapshot is created an mounted on a directory
which reflects the date/time of creation.
The directory structe then is:
/mnt/snapshot/data/20070520
|
+--0700
+--0730
+...
+...
+--1830
+--1900
/mnt/snapshot/data/20070521
|
+--0700
+--0730
+...
+...
+--1830
+--1900
The same for the other shares and valid for a maximum of three days.
If the snapshot has expired (reached the age of 3 day) it has to be
unmounted and removed (the snapshot and the mount point).
The filesystem on these shares are XFS.
After creating a couple of snapshots and mounting them accordingly the
machine freezes. Samba was unusable, login was able. But also a
"shutdown -r now" does not work. The machine hung. Only reset helps out.
First i thought it is may a problem of XFS. I setup another machine for
testing purposes with ext3. But the same occurs.
The system is:
Debian SID
Kernel 2.6.11
LVM2
Is the snapshot feature not intended for this what i do/want or have i a
fault in thinking?
Any help/hint is much appreciated.
Best regards,
Micha Holzmann
--
Der Horizont vieler Menschen ist ein Kreis mit Radius Null,
und das nennen sie ihren Standpunkt
More information about the linux-lvm
mailing list