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

[Nattapon Viroon]

So the cMirror  don't do data replication via network lan like drbd do.
Data replication  do across fibre.
So this make cMirror suppose to be better performance than drbd ?


On Sun, Mar 17, 2013 at 3:37 PM, emmanuel segura <emi2fast at gmail.com> wrote:

> 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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>
>
>
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