Alan Robertson wrote:
Huang Zhen wrote:
Alan Robertson wrote:
Huang Zhen wrote:
Hi,
Some thoughts about our solution for split-site cluster:
1. the split-site cluster includes one or more sites.
2. a site means a set of nodes in one subnet.
No.
A site means a collection of machines in one location connected by
local area networks which can be made reliable for reasonable cost.
3. a subcluster means a set of nodes which can connected each
other in one site.
This is defined on the http://linux-ha.org/ClusterConcepts page.
This page is a bit mathematical in its definitions, but it says what
I mean for it to say. If you have trouble understanding it, please
let me know.
Here is the definitions:
At any given point in time, a cluster is divided into zero or more
subclusters (or partitions).
Each node has a view of subcluster membership, and acknowledges
membership in no more than one of these subclusters.
I think that I can understand it.
However we need deal with split-site.
Do you think one subcluster can include nodes from both two sites?
Normally, you want only one subcluster - total. We are not doing
clusters of clusters here. Just one single cluster which spans sites.
Also known as a split-site cluster.
I should draw some pictures.
--
Alan Robertson <[EMAIL PROTECTED]>
"Openness is the foundation and preservative of friendship... Let me
claim from you at all times your undisguised opinions." - William
Wilberforce
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