[Linux-cluster] How CMirror do replication between luns on diffrence storages

[emmanuel segura]

Daemon providing device-mapper-based mirrors in a shared-storage cluster

The cmirror package provides user-level tools for managing cluster
mirroring. Cmirror is needed for LVM-based mirroring (RAID1) in a cluster
environment

I if rember well, the cmirror daemon is needed when you have a share
storage and you use a lvm mirror

2013/3/17 Nattapon Viroon <droidbkk at gmail.com>

>
> Hi,
>
>   I try setup data replication between storages and use gfs on top.
> Im not sure which solutions is good to go between clvm+cMirror+gfs or
> DRBD+gfs
>
>  DRBD is do raid1 across network that require extra network channel to do
> replication
>
> But I don't know how actually cMirror work to replicate data between luns.
> Do the cMirror require separate network channel to do data replication ?
> or cMirror do replicate via fibre channel ?
>
> Please advise.
>
> Nattapon
>
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