Re: Using SSDs for caching?

Tomasz Torcz
2009-06-18T15:55:30Z

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 =20
> caching. Sun uses different SDs for read and write caching (one being=
=20
> faster for reads and the other for writes). The storage solution from=
=20
> Sun is based on Solaris with ZFS.
>
> I know too little about filesystems design to know exactly how they d=
o =20
> this, but can someone think of a way this could be implemented in btr=
fs?=20

Linux already has second-level=C2=B9 cache layer, it called FS-Cache.=
For now,
the sole user is NFS. btrfs could take advantage of FS-Cache also.

=C2=B9 first-level is page cache in RAM

--=20
Tomasz Torcz "Never underestimate the bandwidth of a stat=
ion
xmpp: zdzichubg@chrome.pl wagon filled with backup tapes." -- Jim Gr=
ay