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From Otis Gospodnetic <otis_gospodne...@yahoo.com>
Subject RE: Hardware Question
Date Wed, 27 Jul 2005 22:20:25 GMT
What's CFS?  Cryptographic File System?  I'm not being sarcastic here,
I'm really curious about what you referring to.

Otis

--- Mark Bennett <mbennett@ideaeng.com> wrote:

> Also, non-hardware, have you considered turning off CFS?
> 
> Our client told us this sped up their system.
> 
> -----Original Message-----
> From: Chris Lamprecht [mailto:clamprecht@gmail.com] 
> Sent: Wednesday, July 27, 2005 11:52 AM
> To: java-user@lucene.apache.org
> Subject: Re: Hardware Question
> 
> It depends on your usage.   When you search, does your code also
> retrieve the docs (using Searcher.document(n), for instance).  If
> your
> index is 8GB, part of that is the "indexed" part (searchable), and
> part is just "stored" document fields.
> 
> It may be as simple as adding more RAM (try 4, 6, and 8GB) -- but not
> for your java heap -- instead for the linux filesystem cache.
> 
> I suggest first adding some simple timing output to your search.  You
> want to see how much time you are spending in the call to search(),
> and then how much time you're spending pulling the Documents from the
> index (and how much time you're spending in other parts of your
> search
> application).   The call to search() is typically CPU-intensive,
> while
> pulling Documents is I/O-bound.  And RAM is about 5 or 6 orders of
> magnitude faster than disk I/O.
> 
> -chris
> 
> On 7/27/05, Michael Celona <mcelona@criticalmention.com> wrote:
> > I am going over ways to increase overall search performance.
> > 
> > 
> > 
> > Currently, I have a dual zeon with 2G of ram dedicated to java
> searching
> an
> > 8G index on one 7200 rpm drive.
> > 
> > 
> > 
> > Which will give the greatest payoff?
> > 
> > 
> > 
> > 1)       Going to 64bit server and giving more memory to java with
> faster
> > drives
> > 
> > 
> > 
> > Or
> > 
> > 
> > 
> > 2)       Staying with 32bit server but going with faster drives and
> > splitting the operating system from the index drive.
> > 
> > 
> > 
> > 
> > 
> > Basically, what are the performance improvements from separating
> the
> > operation system form the index drive(s).
> > 
> > 
> > 
> > 
> > 
> > Thanks,
> > 
> > Michael
> > 
> > 
> > 
> > 
> >
> 
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