Re: Announcement: STEC EnhanceIO SSD caching software for Linux kernel

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> -----Original Message-----
> From: Jason Warr [mailto:jason@xxxxxxxx]
> Sent: Friday, January 18, 2013 10:15 PM
> To: Amit Kale; device-mapper development; kent.overstreet@xxxxxxxxx;
> Mike Snitzer; LKML; linux-bcache@xxxxxxxxxxxxxxx
> Subject: Re:  Announcement: STEC EnhanceIO SSD caching
> software for Linux kernel
> 
> 
> On 01/18/2013 10:11 AM, thornber@xxxxxxxxxx wrote:
> > On Fri, Jan 18, 2013 at 09:56:19AM -0600, Jason Warr wrote:
> >> If I can help test and benchmark all three of these solutions please
> >> ask.  I have allot of hardware resources available to me and perhaps
> >> I can add value from an outsiders perspective.
> > We'd love your help.  Perhaps you could devise a test that represents
> > how you'd use it?
> >
> > - Joe
> > --
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> 
> As much as I dislike Oracle that is one of my primary applications.  I
> am attempting to get one of my customers to setup an Oracle instance
> that is modular in that I can move the storage around to fit a
> particular hardware setup and have a consistent benchmark that they use
> in the real world to gauge performance.  One of them is a debit card
> transaction clearing entity on multi-TB databases so latency REALLY
> matters there.  

I am curious as to how SSD latency matters so much in the overall transaction times.

We do a lot of performance measurements using SQL database benchmarks. Transaction times vary a lot depending on location of data, complexity of the transaction etc. Typically TPM (transactions per minute) is of primary interest for TPC-C.

> Hopefully I'll have a couple of them setup within a
> week.  At that point I may need help in getting the proper kernel trees
> and patch sets munged into a working kernel.  That seems to be the spot
> where I fall over most of the time.
> 
> Unfortunately I probably could not share this specific setup but it is
> likely that I can derive a version from it that can be opened.

That'll be good. I'll check with our testing team whether they can run TPC-C comparisons for these three caching solutions.

-Amit

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