[Ocfs2-users] Problem with datavolume option

[Sunil Mushran]

The datavolume mount option is not necessary for mounts that hold
the db files. You could instead set filesystemio_options in init.ora as
explained in the user's guide.

On 11/1/2010 12:37 AM, Rafa Carreres wrote:
> Hi,
>
> The facts
>
> I have a cluster running Oracle RAC with two nodes accesing a shared
> storage using ocfs2 1.4.7 as a filesystem.
> It has been working perfectly right until now.
> We need to manage certain files with the utl_file package (included with
> oracle database) and store them in the ocfs2 filesystem volume.
> The files can be created and accessed, but can't be read.
> In fact, we can read the begining of the files, but after having read
> about 1 KB, I get a read file error.
> If the file is<1KB size, I have no problem.
> The volume is mounted with the nointr and datavolume options.
> The utl_file package use a buffered I/O and for what I know, the
> datavolume option means using direct I/O (not buffered).
> If I mount the volume without the datavolume option, the problem dissapears.
>
> The conclusion
>
> Using the oracle utl_file package with a ocfs2 volume mounted with the
> datavolume option is not a good idea.
>
> I don't know if this behavior is the same with other applications (with
> buffered I/O). Can anybody confirm this point?
>
> Best Regards
>
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