This is very fast.
On IT Toolbox there are many whitepapers about it.
On the ERP and DataCenter sections specifically.
We need that all tests that we do, we can share it on the
Project Wiki.
Regards
On Nov 13, 2009, at 7:02 AM, Karl Denninger wrote:
Laszlo Nagy wrote:
Hello,
I'm about to buy SSD drive(s) for a database. For decision making, I
used this tech report:
http://techreport.com/articles.x/16255/9
http://techreport.com/articles.x/16255/10
Here are my concerns:
* I need at least 32GB disk space. So DRAM based SSD is not a real
option. I would have to buy 8x4GB memory, costs a fortune. And
then it would still not have redundancy.
* I could buy two X25-E drives and have 32GB disk space, and some
redundancy. This would cost about $1600, not counting the RAID
controller. It is on the edge.
* I could also buy many cheaper MLC SSD drives. They cost about
$140. So even with 10 drives, I'm at $1400. I could put them in
RAID6, have much more disk space (256GB), high redundancy and
POSSIBLY good read/write speed. Of course then I need to buy a
good RAID controller.
My question is about the last option. Are there any good RAID cards
that are optimized (or can be optimized) for SSD drives? Do any of
you
have experience in using many cheaper SSD drives? Is it a bad idea?
Thank you,
Laszlo
Note that some RAID controllers (3Ware in particular) refuse to
recognize the MLC drives, in particular, they act as if the OCZ Vertex
series do not exist when connected.
I don't know what they're looking for (perhaps some indication that
actual rotation is happening?) but this is a potential problem....
make
sure your adapter can talk to these things!
BTW I have done some benchmarking with Postgresql against these drives
and they are SMOKING fast.
-- Karl
<karl.vcf>
--
Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx
)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
--
Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
