On Tue, Oct 11, 2016 at 10:36:00AM +0800, 孟祥辉 wrote:
> Hi Ulrich,
> you maybe misunderstood my purpose, i am not going to do caching on
> iSCSI transport layer.  you are right that  iSCSI devices can be
> cached just as normal block devices are.  indeed a normal block device
> can be cached using memory to cache the hot data.  but iscsi driver
> has differences with normal block device, after all it's a remote
> disk.
> so i want to use a normal block device to act as a cache disk for
> iscsi device besides using the normal memory cache.  do you have any
> suggestions?

Maybe one of the existing solutions designed for using an SSD as a high
speed cache in front of larger slower disc?  bcache or lvmcache?

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