On Sun, April 21, 2013 12:06, Pandu Poluan wrote: > On Apr 21, 2013 4:51 PM, "J. Roeleveld" <jo...@antarean.org> wrote: >> >> On Sat, April 20, 2013 18:22, Pandu Poluan wrote: > > > If you have the budget, you really should invest in a SAN > > > Storage solution that can provide "tiered storage", in which > > > frequently used blocks will be 'cached' in SSD, while less > > > frequently used blocks are migrated first to slower SAS > > > drives, and later on (if 'cold') to even slower SATA > > > drives. > > > > 4-tier sounds nicer: 1 TB in high speed RAM for the high-speed > > layer, with dedicated UPS to ensure this is backed up to disk > > on shutdown. > > Indeed! But 1 TB is kind of overkill, if you ask me... :-D
Maybe, but when using that for VMs in a lab environment where you want to create snapshots quickly. > VMware and XenServer can 'talk' with some Storage controllers, where they > conspire in the background to provide 'victim cache' on the virtualization > host. Not sure about Hyper-V. > > I myself had had good experience relying on EMC VNX's internal 8 GB cache; > apparently the workload is not high enough to stress the system. When the time comes to upgrade the hardware, I will look into that. By then, this technology should be more common as well. -- Joost
