Re: [zfs-discuss] Sun Flash Accelerator F20

2009-10-20 Thread Robert Dupuy
A word of caution, be sure not to read a lot into the fact that the F20 is included in the Exadata Machine. >From what I've heard the flash_cache feature of 11.2.0 Oracle that was enabled >in beta, is not working in the production release, for anyone except the >Exadata 2. The question is, why

Re: [zfs-discuss] Sun Flash Accelerator F20

2009-10-20 Thread Robert Dupuy
My post is a caution to test the performance, and get your own results. http://www.storagesearch.com/ssd.html Please see the entry for October 12th. The result page you linked too, shows that you can use an arbitrarily high number of threads, spread evenly across a large number of SAS channel

Re: [zfs-discuss] Sun Flash Accelerator F20

2009-10-20 Thread Robert Dupuy
I agree, that assuming that the F20 works well for your application, because its included in the Exadata 2, probably isn't logical. Equally, assuming it doesn't work, isn't logical. Yes, the X-25E is clearly a competitor. It was once part of the Pillar Data Systems setup, and was disqualified

Re: [zfs-discuss] Sun Flash Accelerator F20

2009-10-20 Thread Robert Dupuy
"there is no consistent latency measurement in the industry" You bring up an important point, as did another poster earlier in the thread, and certainly its an issue that needs to be addressed. "I'd be surprised if anyone could answer such a question while simultaneously being credible." http:

Re: [zfs-discuss] Sun Flash Accelerator F20

2009-10-21 Thread Robert Dupuy
There is a debate tactic known as complex argument, where so many false and misleading statements are made at once, that it overwhelms the respondent. I'm just going to respond this way. I am very disappointed in this discussion group. The response is not genuine. The idea that latency is not