[Cc: Alberto Garcia of QEMU, who added the 'l2-cache-size' upstream] On Wed, Nov 15, 2017 at 05:54:13AM -0500, John Ferlan wrote: > > > On 11/14/2017 08:58 PM, Lin Ma wrote: > > Lin Ma (2): > > caps: Add capability for maximum size of the qcow2 L2 table cache > > qemu: Add support for 'l2-cache-size' property of qcow2 > > > > There's already something on list about l2 cache, see > > https://www.redhat.com/archives/libvir-list/2017-September/msg00553.html > > it adds 3 related variables. IIRC, the "hold up" is how best to describe > how to use it or provide the feature in such a way that it's > "understandable" for general consumption without making a "policy" that > generates certain values based on expected usage/needs for the client. I recall Alberto saying that there's a default value of QCOW2 'l2-cache-size', but it is (intentionally?) low. And that the value depends on the workload / use case: size of the image, the amount of I/O you want to do, etc. There's also an RFE for OpenStack Nova to expose this. (But I don't know if it makes sense to expose it at that level, yet.) [...] -- /kashyap -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
