[Ocfs-users] OCFS adding/removing nodes

[David McWhinnie]

Just started happening, there is no other activity on
the system.  Everything is shutdown.

I was originally looking into a "no space left on
device issue" (lots of space left tho) while running
an RMAN restore....  Thought that was a fragmentation
issue, but reformated the partitions and the no space
error came back.  So at that point was trying a dd to
create a file and noticed the dd hanging along with
the messages about nodes being removed.

But when the no space left error occurs, the node
removal messages don't appear.  

David

--- Sunil Mushran <Sunil.Mushran at oracle.com> wrote:

> No, dd is mostly unrelated.
> What those messages indicate that the heartbeat
> thread is not keeping up,
> which is not good. Yes, all the processes requiring
> a cluster lock will hang
> as a node is being evicted from the cluster.
> 
> That you are getting these errors with as low as 16
> mounts is puzzling.
> 
> When do these errors messages pop up? Any
> relationship with the load on
> the system?
> 
> David McWhinnie wrote:
> 
> >We have 16 OCFS mounts.
> >We are running RedHat 2.1
> >OCFS version 1. Latest patch.
> >
> >Turns out a dd was being done without the o_direct
> >option.  So that could be the cause.  Interesting
> this
> >ls, df etc would all hang while the node was
> removed
> >from the cluster.
> >
> >David
> >--- Sunil Mushran <Sunil.Mushran at oracle.com> wrote:
> >
> >  
> >
> >>how many ocfs mounts do you have on that box?
> >>which kernel?
> >>ocfs version?
> >>
> >>David McWhinnie wrote:
> >>
> >>    
> >>
> >>>We are getting the following messages.
> >>>Jan  6 10:19:25 houided006 kernel: ocfs: Adding
> >>>houided005 (node 0) to clustered device (8,208)
> >>>Jan  6 10:19:52 houided006 kernel: ocfs: Removing
> >>>houided005 (node 0) from clustered device (8,208)
> >>>
> >>>every few minutes.
> >>>
> >>>Any advice on how to troubleshoot this?
> >>>
> >>>David.
>



		
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