[linux-lvm] Mirroring implementation
brem.belguebli at gmail.com
Sun Jul 26 10:12:49 UTC 2009
I have a few questions concerning LVM mirror implementation, and I couldn't
find any suitable design doc
I need to setup a dual site ( a few miles between the 2 sites, around 1 ms
RTD) mirror based cluster system.
- what is the default behaviour of the mirroring, writing in parallel to
both mirror legs or serialized ? what about read requests ?
- for write requests, is the ack returned to the application (thru VFS) when
the 2 legs are updated or only when the first is updated ?
- Is there a way to control it ?
- what happens if the log device is lost ?
I saw a post about LVM mirror vs mdadm where it is about the location of the
mirror log (
gave the answer that when creating the LV's with --alloc anywhere it will
auto locate the log on any of the PV's.
According to what I could read, the --alloc doesn't intend for that, am I
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the linux-lvm