Dne 13.10.2014 v 14:20 Kees de Jong napsal(a):
Hi, The documentation is not clear about how big the cache size should be for optimal performance. It only gives pointers about how big the meta data for the cache should be. "Create the cache metadata LV. This LV will hold cache pool metadata. The size of this LV should be 1000 times smaller than the cache data LV, with a minimum size of 8MiB." There is however an example in the man page with a 100GB OriginLV which apparently needs (at least) 10GB of cache size. But what is the math? I for example have 4 LV's I want to cache. 6GB, 60GB, 100GB and 2TB and I have a 240GB SSD which will act as the caching disk. Could someone please fill in the gaps here?
https://github.com/jthornber/thin-provisioning-tools/blob/master/caching/cache_metadata_size.cc The recent lvm2 tools (git) should maintain the size of metadata device at proper size for any given cache pool data device size. Zdenek _______________________________________________ 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/
