Database Reference
In-Depth Information
Figure 6.41
ioTurbine architecture overview.
In addition to being able to cache a VM, ioTurbine is capable of caching disks, files,
and entire volumes. With the optional in-guest agent, the caching becomes data and
application aware. This means particular files within the OS can be cached while others
are filtered out. This is very useful for SQL where we only want the data files and Temp
DB files cached while the transaction logs are not cached.
ioTurbine is fully compatible with VMware features such as DRS, HA, and vMotion.
ioTurbine also works in environments where not all ESXi hosts contain a flash device,
in which case the flash cache of a server would be set to 0.
In the example in
Figure 6.42
,
if one of the VMs in the left ESXi host is migrated to the
right ESXi host, all VMs will be allocated one third of the flash cache capacity of each
host because there will be three cached VMs on each host.
