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Re: [Linux-cluster] SEMI OT. Synchronizing jboss cache dir.





2009/9/1 Kaloyan Kovachev <kkovachev varna net>
On Tue, 1 Sep 2009 14:21:47 +0200, ESGLinux wrote
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> You should use one iscsi lun shared by both cluster nodes. You can mount a
GFS filesystem without locking (lock=nolock) with (correct me if I am wrong)
the node not being part of a cluster, but only in one node at a time.
> You can mount a GFS filesystem created for a certain cluster without having
the filesystem configured as a resource, the only requisite is that the nodes
mounting the filesystem have to be part of that certain cluster.
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> If I have understand you ok, I need to create a cluster, for example,
MYCLUSTER, then create a resource of type GFS filesystem. After that I must
create 2 nodes in the cluster, access de iscsi lun from this nodes and finally
mount the gfs filesystem.
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> With these I can share this directory between the nodes without the risk of
file corruption?
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> Well, in the case I canґt use this approach, is there any way to do this?
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if you don't have shared storage, but you have local disks - you may use DRBD
instead of iSCSI.

this looks interesting, any good manual about using DRBD?

 
About the cluster - you don't need to define any resources -
just have a cluster which is quorate to avoid data corruption while accessing
the GFS on DRBD


ok, so I only need the cluster with the 2 nodes and the gfs filesystem formated, for example like this:

gfs_mkfs -p lock_dlm -t MyCLUSTER:mydata -j 8 /dev/sda1

When  I have done this I can mount /dev/sda1 in both nodes as use it 

isn´t it?

Thanks, 

ESG


> Thanks for your time,
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> ESG
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> Regards,
> Juanra
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