On 4/10/06, Ed Wilts <ewilts@xxxxxxxxxx> wrote:
>
> The obvious question is why? What would this provide that the kernel
> and file systems don't already provide?
>
Well, kernel provides in-memory page cache, not local disk page cache.
There is some ongoing remote file system local disk cache work being
done, but it applies primarily to AFS and NFS - not block-based
transports such as iSCSI and AOE. The various cluster file systems
may provide something more akin to this, but again, this doesn't
really cover SAN technologies -- not in any sort of a generic way.
Let me know if I'm missing something.
-eric
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