A Principled Technologies test report 2
Improving database performance with Dell Fluid Cache for SAN
HOW FLUID CACHE FOR SAN SPEEDS UP PERFORMANCE
Caching software solutions duplicate frequently accessed data in the cache layer
to reduce application/disk latencies and user response times, by minimizing the amount
of data that travels from the slower storage media to the application interface. Caching
is ideal for less predictable workloads that may experience spikes in activity, or
“hotness” in certain areas, such as database activity during a busy shopping day for a
retailer.
Dell designed Fluid Cache for SAN to accelerate applications and boost
transactional performance. Fluid Cache for SAN utilizes direct-attached Dell PowerEdge
Express Flash NVMe PCIe SSDs and remote direct memory access (RDMA) networking
capabilities to create a clustered caching pool for improved storage workload
performance. Applications write directly to the cache pool, the acknowledgement is
sent back to the application, and in the background the IO is flushed to the external
storage array. Data is copied in to the cache pool when it is accessed (read) by
application and is available from the cache pool for re-reads. Additionally, data that is
written into the cache pool by the application is then available for re-reads from the
application. A high-speed link to other cache nodes in the Fluid Cache for SAN pool
allows your data to remain highly available by replicating blocks of data, even if a single
node in cache pool goes down. Fluid Cache for SAN provides a single management
interface and provides other capabilities such as cache-aware snapshots and replication
and compression. Dell Fluid Cache allows you to easily create and add the cache you
need to make sure you meet the current and future demands of your business.
Figure 1 shows an example environment highlighting how Fluid Cache for SAN
communicates between server and storage. Three nodes are required to run Dell Fluid
Cache for SAN software. Two of these three nodes are required to have a minimum of
one Dell PowerEdge Express Flash NVMe PCIe SSD each, and the 10GbE or 40GbE
network for private cache network is based on the low-latency RDMA protocol. The
RDMA network handles the cache pool communication between the nodes. Creation
and management of the Fluid Cache cluster is accomplished using the Dell Compellent
Enterprise Manager software through automatic cache server discovery.
(23 Seiten)
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