[Ocfs2-devel] Global heartbeat - drop#1

[Wengang Wang]

Hi Sunil,

The global heartbeat also introduce a difference comparing with local heart.
With the ghb, what if the non-heartbeat ocfs2 volume(s) fail(s)? Say some lower
layer(raid/disk-driver) become unhappy to work anymore. In case, no failover
since no self-fence I think. So it could cause the domain in question
unavailable(finally), isn't it? With the original lhb scheme, no such problem.
Is there a solution?

regards,
wengang.

On 10-07-23 16:55, Sunil Mushran wrote:
> 
> This is the first drop of the global heartbeat patches for ocfs2/kernel.
> 
> The first few patches add support for heartbeat mode in sysfs, the new
> incompat clusterinfo flag and the new mount option heartbeat=global.
> 
> 0001-ocfs2-cluster-Add-heartbeat-mode-configfs-parameter.patch
> 0002-ocfs2-Add-an-incompat-feature-flag-OCFS2_FEATURE_INC.patch
> 0003-ocfs2-Add-support-for-heartbeat-global-mount-option.patch
> 0004-ocfs2-dlm-Expose-dlm_protocol-in-dlm_state.patch
> 
> The next few patches enhance the join domain protocol to get the list
> of configured nodes and heartbeating regions to ensure that all nodes
> in the cluster have the same view of the cluster.
> 
> 0005-ocfs2-cluster-Get-all-heartbeat-regions.patch
> 0006-ocfs2-dlm-Add-message-DLM_QUERY_HBREGION.patch
> 0007-ocfs2-Print-message-if-user-mounts-without-starting-.patch
> 0008-ocfs2-dlm-Add-message-DLM_QUERY_NODEINFO.patch
> 
> The one known missing bit concerns quorum calculation. I am still
> working on it.
> 
> http://oss.oracle.com/osswiki/OCFS2/DesignDocs/NewGlobalHeartbeat
> 
> Thanks
> Sunil
> 
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