Copyright@1994~2015
Advanced
Computer
&
Network
Corp.
All
Rights
Reserved.
67
JetStor
NAS
724UX
/
724UX
10G
–
User
Manual
How
to
use
thin
provisioning?
1.
Create
a
file
system
with
thin
provisioning
turned
ON.
The
Size
option
will
be
grey
out.
Because
the
upper
size
limit
is
the
available
size
of
the
storage
pool,
there
is
no
quota
size
or
reserved
size.
2.
Check
the
network
drive
property.
The
size
is
the
remaining
pool
size.
So
it’s
dynamic.
3.
Copy
some
files
to
the
share.
There
is
no
pre
‐
allocated
space
(reserved
size).
The
used
size
reflects
just
the
exact
amount
of
the
files
being
copied.
Deduplication
The
following
are
the
deduplication
features:
Inline,
block
level
redundancy
remover.
Applied
to
both
file
system
and
volume.
Dedup
function
can
be
turned
ON
and
OFF
on
the
fly
during
I/O.
Deduplication
size
limit:
dedup
performance
is
highly
dependent
on
the
size
of
memory.
When
the
size
limit
has
reached,
deduplication
function
on
all
storage
pools
will
be
disabled
automatically
and
grey
out.
Memory
size
Deduplication
size
limit
4GB
87GB
8GB
137GB
16GB
371GB
TIP:
Starting
from
FW
1.0.3,
there
will
be
deduplication
size
limit
imposed
on
enabling
deduplication
to
avoid
performance
degradation.
Deduplication
size
limit
can
be
removed
by
the
following
means:
。
Per
pool
basis:
Add
read
cache
(L2ARC)
using
SSD
drives.
。
Per
system
basis:
Add
more
memory
to
the
system
or
delete
deduplicated
data
to
release
space.
Compression
The
following
are
the
compression
features:
Compression
algorithm
adopts
LZJB.
Applied
to
both
file
system
and
volume.
Compression
can
be
turned
ON
and
OFF
on
the
fly
during
I/O.
