On Thu, May 22, 2014 at 02:04:05PM -0400, Mike Snitzer wrote: > By default dm-cache (as is currently upstream) is _not_ going to cache > sequential IO, and it also isn't going to cache IO that is first > written. It waits for hit counts to elevate to the promote threshold. > So dm-cache effectively acts as a hot-spot cache by default. OK, that makes sense, thanks. I wrote about using the LVM cache feature here: https://rwmj.wordpress.com/2014/05/22/using-lvms-new-cache-feature/#content Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
