Re: Using SSDs for caching?

Roy Sigurd Karlsbakk
2009-06-18T17:25:46Z

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 bein=
g
>> faster for reads and the other for writes). The storage solution fro=
m
>> Sun is based on Solaris with ZFS.
>>
>> I know too little about filesystems design to know exactly how they =
=20
>> do
>> this, but can someone think of a way this could be implemented in =20
>> btrfs?
>
> Linux already has second-level=B9 cache layer, it called FS-Cache. =20
> 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. =20
Where can I find anything about this second (or fifth) level caching?