ADSM bypasses JFS buffering on writes by requesting synchronous
writes.

Barry Fruchtman
ADSM Development

On Tue, 14 Jan 1997, Pierre Verpeaux wrote:

> I think you should use raw LV. It is the only way to make ADSM aware
> of what is really written on the disk. The JFS buffering can improve
> performances, but in case of a system crash, your database can be
> inconsistent. As i understand it, the JFS log concern only the filesystem
> structure and not the file's content.
>
> If there is a problem with database corruption when the server is not
> correctly shut down, that is a bug in ADSM which must be corrected.
> A database manager must ensure the integrity of the database but for
> this, it needs to know the real state of the database (what is the content
> of the disk ? ).
>
> If there is a way to bypass the JFS buffering, i would be thery happy to
> know it as i need it for performance reason.
>
> Pierre Verpeaux
>