Chapter 3. installation planning, Determining the number of logical libraries, Basic guidelines – Dell TL2000 User Manual
Page 41: Library sharing, Chapter, Installation, Planning, Determining, Number, Logical
Chapter
3.
Installation
Planning
Before
installing
your
library,
take
time
to
review
the
following
information.
Determining
the
Number
of
Logical
Libraries
You
can
partition
the
library
into
as
many
logical
libraries
as
there
are
drives
in
the
library.
Basic
Guidelines
v
Each
logical
library
must
contain
at
least
one
drive.
v
A
library
configuration
of
exactly
one
logical
library
equals
the
entire
physical
library.
v
The
library
issues
a
warning
to
the
user
if
media
is
moved
across
logical
libraries.
Library
Sharing
The
library’s
default
configuration
allows
a
single
application
to
operate
the
library
through
a
single
control
path.
Often,
it
is
advantageous
to
be
able
to
share
a
single
library
between
heterogeneous
(dissimilar)
or
homogeneous
(similar)
applications.
Some
applications
(and
some
servers)
do
not
allow
for
sharing
a
library
between
systems.
Configurations
can
be
created
that
enable
the
library
to
process
commands
from
multiple
heterogeneous
applications
and
multiple
homogeneous
applications.
From
the
library’s
Web
User
Interface
or
Operator
Control
Panel,
the
following
actions
can
be
performed:
v
Configure
the
library
so
that
it
is
partitioned
into
separate
logical
libraries
that
independently
communicate
with
separate
applications
through
separate
control
paths.
This
configuration
requires
no
special
capabilities
from
the
server
or
application.
(For
more
information,
see
v
Configure
any
single
logical
library
(including
the
entire
physical
library)
so
that
it
is
shared
by
two
or
more
servers
that
are
running
the
same
application.
Depending
on
the
capabilities
of
the
server
and
application,
there
are
several
ways
to
set
up
this
type
of
configuration.
Three
typical
ways
include:
–
Configuring
one
server
(host)
to
communicate
with
the
library
through
a
single
control
path;
all
other
servers
send
requests
to
that
server
through
a
network.
–
Configuring
all
of
the
servers
to
communicate
with
the
library
through
a
single,
common
control
path.
This
configuration
is
used
in
high-availability
environments.
Multi-initiator
configurations
are
only
supported
by
certain
adapters
and
independent
software
vendors
(ISVs).
Check
with
your
ISV.
–
Configuring
a
single
logical
library
to
communicate
with
multiple
servers
through
multiple
control
paths.
This
configuration
requires
that
control
paths
be
added
(see
Library
configuration
is
not
limited
to
the
examples
given
above.
Many
configurations
are
possible,
and
can
be
designed
according
to
your
business
needs.
For
additional
information,
refer
to
your
host
application
documentation.
3-1