TriDent (was: Safe and stable)
Mike Bostock
mike at yew-tree.co.uk
Thu Mar 2 21:43:04 GMT 2000
In your message regarding Re: TriDent (was: Safe and stable) dated Thu,
02 Mar 2000 14:23:15 -0500, David Collier-Brown said that ...
<snipped>
>
> Sure: in the case of exactly one user using the database's
> data files, they would be cached locally on that person's
> client. This causes a performance improvement.
>
> In the normal multi-user case, the first client gets an oplock,
> caches the file, and as soon as the second user comes along,
> gets an oplock break and has to write-back the cache, wasting
> time. After that, the two (or more) users access individual
> chunks of the file from the server, with no caching, but under
> control of windows byte-range locks.
>
> I'd mildly recommend making just the share that the database
> is on non-cached (oplocks = no), as it will save on wasted
> attempts to cache, and not hurt performance if you have
> more than one user.
This was exactly the answer I was looking for - thank you very much indeed.
--
Mike Bostock
Home: mike at yew-tree.co.uk
Work: mike at wistaria.co.uk
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