Re: Using SSDs for caching?

hu.taoo
2009-06-19T02:36:12Z

On Thu, Jun 18, 2009 at 07:25:46PM +0200, Roy Sigurd Karlsbakk wrote:
> On 18. juni. 2009, at 17.55, Tomasz Torcz wrote:
>
> > On Thu, Jun 18, 2009 at 03:56:23PM +0200, Roy Sigurd Karlsbakk wrote:
> >> I have heard/read about systems from Sun and NetApp using SDs for
> >> caching. Sun uses different SDs for read and write caching (one being
> >> faster for reads and the other for writes). The storage solution from
> >> Sun is based on Solaris with ZFS.
> >>
> >> I know too little about filesystems design to know exactly how they
> >> do
> >> this, but can someone think of a way this could be implemented in
> >> btrfs?
> >
> > Linux already has second-level? cache layer, it called FS-Cache.
> > For now,
> > the sole user is NFS. btrfs could take advantage of FS-Cache also.
>
>
> I googled around a bit for this, but couldn't find anything useful.
> Where can I find anything about this second (or fifth) level caching?

Will this help? http://www.linux-mag.com/cache/7378/1.html