Re: swapcache-style cache?

On Mon, Feb 27, 2012 at 11:54 PM, Andrea Suisani <sickpig(at)opinioni(dot)net> wrote:
> On 02/28/2012 04:52 AM, Rob Wultsch wrote:
>>
>> On Wed, Feb 22, 2012 at 2:31 PM, james<james(at)mansionfamily(dot)plus(dot)com>
>>  wrote:
>>>
>>> Has anyone considered managing a system like the DragonFLY swapcache for
>>> a
>>> DBMS like PostgreSQL?
>>>
>>
>> https://www.facebook.com/note.php?note_id=388112370932
>>
>
> in the same vein:
>
> http://bcache.evilpiepirate.org/
>
> from the main page:
>
> "Bcache is a patch for the Linux kernel to use SSDs to cache other block
> devices. It's analogous to L2Arc for ZFS,
> but Bcache also does writeback caching, and it's filesystem agnostic. It's
> designed to be switched on with a minimum
> of effort, and to work well without configuration on any setup. By default
> it won't cache sequential IO, just the random
> reads and writes that SSDs excel at. It's meant to be suitable for desktops,
> servers, high end storage arrays, and perhaps
> even embedded."
>
> it was submitted to linux kernel mailing list a bunch of time, the last one:
>
> https://lkml.org/lkml/2011/9/10/13
>
>
> Andrea

I am pretty sure I won't get fired (or screw up the IPO) by saying
that I have a high opinion of Flashcache (at least within the fb
environment).

Is anyone using bcache at scale?

--
Rob Wultsch
wultsch(at)gmail(dot)com