BCA Show Daily - Day 1 - 51

Show Daily | Tuesday 26 June 2018

A part of

MARINA BAY SANDS * SUNTEC SINGAPORE

SUNTEC SINGAPORE

51

Why DDPs Way of Caching and Load
Balancing Differs from All Others
DDP - Dynamic Drive Pool - is the Ethernet SAN
system that differs from all others...

T

he Ardis Virtual File System AVFS is the
technology behind the DDP. With the DDP
technology, the metadata (the virtual file
system) is independent of the data.
The data itself is stored in Data Locations.
The metadata shows up as one virtual volume
("ddpvolume"). This "ddpvolume" can hold
folders with volume properties - the socalled FolderVolumes. For each FolderVolume
you have a precise access control; you can
assign quota to manage capacity and they
also enable a unique way of using SSD
caching and deciding where the data resides
by selecting Data Locations.
Very often, SSD caching is used as a
synonym for caching of metadata. For DDP,
the main topic is the data SSD caching. It's
another big advantage of the DDP technology
that, although iSCSI itself is a block-based
technology, the DDP systems work file-based

copy/ingest into your FolderVolume will be
distributed as "Load Balanced" to HD1 and
HD2. This Load Balancing already increases
performance, and all data in use will also
be copied to the SSD cache, which again
increases performance. For projects with very
high-performance requirements, you can also
use the SSDs as primary storage, so all files
are directly stored on the SSD cache.

thanks to the AVFS file system. This enables
file-based caching as well as advanced
caching modes. You have full control of
the SSD cache and you can configure it for
each of your FolderVolumes to increase
performance where and when it is needed.
Let's say you have a DDP system
GMA Networks with three Data Locations: "Cache", Philippines uses
"HD1" and "HD2". "Cache" consists the DDP solution
of SSD drives, while HD1 and HD2
consist of normal spinning hard
drives. To start your project, you
create a FolderVolume to hold your
project data. It is a virtual volume so
you can set the caching method and
the Data Location specifically for this
FolderVolume.
Choose "On-Demand" as the cache
method, and "balanced" as the
Data Location. All data that you now

The three Data Locations mentioned above
can be all in one single DDP system, but they
could be also in three different DDP systems/
cluster nodes. The DDPs can be of different
types and build dates and do not even have to
be in the same room or city. That's why DDP
gives a real scale-out solution: linear scaling
in bandwidth and capacity where desktops
have Parallel Data Access in a cluster, and
you can easily add more DDPs
without changes to the directory.
Importantly, if you realise that you
can add new DDPs or remove old
DDPs any time without interrupting
the workflow; if you realise that you
can easily increase capacity and
performance if necessary; and you
realise that administration is always
for one virtual volume only, that
means that a DDP Cluster is able to
live forever and to always stay up to
date. Visit us on Stand: 4V3-02.
www.ddpsan.asia
http://www.ddpsan.asia http://www.viaccess-orca.com http://www.viaccess-orca.com
Table of Contents for the Digital Edition of BCA Show Daily - Day 1
