Given the low cost of local storage on VM servers and the significant advantages of a local cache, there are few remaining products that act as pure gateways. It's usually implemented as a virtual appliance, running as a VM and exposing NFS and SMB NAS file protocols or block interfaces, such as iSCSI, to on-premises users and writing data to cloud object storage services. A cloud storage gateway is like a caching appliance without the local storage.There are two variants on cloud caching technology that don't act as pure local caches: The AWS Storage Gateway is an example of a hybrid gateway that supports multiple storage types and back-end cloud services.
#Icaching providers software#
Appliances also use data reduction algorithms, such as compression and deduplication, along with WAN optimization software to improve performance and minimize latency when retrieving cache misses - the data not in the cache - from the cloud. They use cache management algorithms - typically, the least recently used or adaptive replacement cache algorithms - to maximize the cache hit rate and minimize external data traffic.
.jpg "icaching providers")
As this Gartner definition points out, like other in-line caches, these appliances intercept file, block or object storage I/O, depending on the device and application. They create a distributed storage system encompassing multiple enterprise data centers, edge locations and IaaS regions hosting storage services.Ĭloud caching systems are sometimes called hybrid storage gateway appliances to emphasize their role as a bridge between on-premises and cloud infrastructure. These appliances can be used in parallel, within a single cluster and across multiple remote locations. The most popular implementation uses on-premises hardware or a virtual appliance that connects to at least one cloud-resident virtual gateway and provides the conduit to one or more cloud object, file or block storage services. There are several categories of cloud storage caching appliances available. One popular approach is a cloud caching appliance resembling small NAS arrays that regularly synchronize with one or more cloud storage services, which act as the authoritative data source. Storage caching takes many forms in the cloud. With these techniques, information that's frequently accessed is copied to local repositories with local changes automatically replicated to a central storage location. The typical solution to data latency, whether on a processor chip or an enterprise IT environment, is caching and synchronizing.
0 kommentar(er)
