Hello,
As an avid fan of the application to flash technologies to the storage
stratum, I researched the
DMCache project (maintained here). It appears that the DmCache
project is quite a bit behind
L2ARC but headed in the right direction.
I found the lwn article very interesting as it is effectively a Linux
application of L2ARC to improve
MySQL performance. I had proposed the same idea in my blog post titled
Filesystem Cache Optimization Strategies.
The net there is that if you can cache the data in the filesystem
cache, you can improve overall
performance by reducing the I/O to disk. I had hoped to have someone
do some benchmarking
of MySQL in a cache optimized server with F20 PCIe flash cards but
never got around to it.
So, if you want to get all of the caching benefits of DmCache, just
run your app on Solaris 10 today. ;-)
Have a great day!
Brad
Brad Diggs | Principal Security Sales Consultant | +1.972.814.3698
Oracle North America Technology Organization
16000 Dallas Parkway, Dallas, TX 75248
eMail: Brad.Diggs at Oracle.com
Tech Blog: http://TheZoneManager.com
LinkedIn: http://www.linkedin.com/in/braddiggs
On May 21, 2010, at 8:00 PM, David Magda wrote:
> Seagate is planning on releasing a disk that''s part spinning rust
> and part flash:
>
> http://www.theregister.co.uk/2010/05/21/seagate_momentus_xt/
>
> The design will have the flash be transparent to the operating
> system, but I wish they would have some way to access the two
> components separately. ZFS could certainly make use of it, and Linux
> is also working on a capability:
>
> http://kernelnewbies.org/KernelProjects/DmCache
> http://lwn.net/Articles/385442/
>
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20100525/bc6f7900/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: PastedGraphic-2.tiff
Type: image/tiff
Size: 9062 bytes
Desc: not available
URL:
<http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20100525/bc6f7900/attachment.tiff>