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Home > Archive > Data Storage > June 2007 > Can clusters connect to other clusters' drives?
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Can clusters connect to other clusters' drives?
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| smp0219@ecu.edu 2007-06-27, 7:14 pm |
| Clariion SANS connect through a brocade switch a cluster of two hosts
called ClusterA. Another connection is to another cluster of two
hosts called ClusterB. Can ClusterA connect to ClusterB drives
without changing the physical connection.
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| On Jun 27, 9:51 pm, smp0...@ecu.edu wrote:
> Clariion SANS connect through a brocade switch a cluster of two hosts
> called ClusterA. Another connection is to another cluster of two
> hosts called ClusterB. Can ClusterA connect to ClusterB drives
> without changing the physical connection.
No, because you would need to have all 4 of the hosts in the same
storage group on the CLARiiON, this would enable all 4 hosts to have
access to the same LUNs, the problem with this configuration is that
either cluster could write to the same LUN at the same time, with no
clustering software this would result in data corruption. EMC does not
support this configuration.
There are methods of doing this at an LVM level where you export the
volumegroups from one host/cluster and import to the other, but this
mean that only one cluster would have access to the same devices at
any one time.
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| smp0219@ecu.edu 2007-06-29, 7:14 pm |
| On Jun 29, 1:38 pm, Conor <buckleyco...@gmail.com> wrote:
> On Jun 27, 9:51 pm, smp0...@ecu.edu wrote:
>
>
> No, because you would need to have all 4 of the hosts in the same
> storage group on the CLARiiON, this would enable all 4 hosts to have
> access to the same LUNs, the problem with this configuration is that
> either cluster could write to the same LUN at the same time, with no
> clustering software this would result in data corruption. EMC does not
> support this configuration.
> There are methods of doing this at an LVM level where you export the
> volumegroups from one host/cluster and import to the other, but this
> mean that only one cluster would have access to the same devices at
> any one time.
How difficult is it to export volumegroups from one host/cluster and
import to another?
I have situation where I need to do this for a month and then I would
need to export them back.
The reason is, I am replacing servers but do not want to loose any
functionality.
Thanks in advance for helping.
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