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Key Beneits
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The NetApp Perormance Acceleration
Modules (PAMs) improve perormance
or workloads that are random readintensive without adding more
high-
perormance disk drives.
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Speed access to your data with these
intelligent read caches, which can
reduce latency by a actor o 10 or
more compared to hard disk drives.
Lower latency can translate into more
throughput or random I/O workloads.
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Use our Perormance Acceleration
Modules instead o extra disk drives to
provide I/O throughput. Our solid state
PAMs use no additional rack space
and consume 95% less power than a
shel o 15k RPM disk drives.
Systems
The NetApp Family oPerormance Acceleration ModulesOptimize the
perormance o your storage system without adding disk drives.Grow
while conserving power, cooling, and space.
the Challenge
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The cost o delivering IT services is under
more pressure than ever. Hard constraintson budget and sta
collide with expectations
or more and better.
Networked storage systems are a case in
point. Providing enough capacity is easy.
Keeping pace with perormance demands
can be dicult because, while they are
getting bigger, disk drives arent getting
any aster.
As a result, large numbers o short stroked
disk drives are commonly used to deliver
the I/O throughput demanded by many
workloads. This approach wastes storage
capacity, rack space, and electricity.
Solid state disks (SSDs) have the potential to
solve this problem. But or most applications
its hard to justiy the cost and complexity
o SSDs.
Fortunately, there is more than one way
to use solid state technology or storage.
Theres a way that optimizes perormance,
reduces costs, and doesnt increase
complexity.
the solution
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We created this amily o intelligent read
caches so you can reduce latency andimprove I/O throughput
without adding more
high-perormance disk drives. Use the PAM
amily modules to improve perormance or
workloads that are random read intensive
such as le services, messaging, and OLTP
databases.
Our second-generation, fash memory-based
PAM II cards are 16 and 32 times larger than
the original, DRAM-based Perormance
Acceleration Module. You can congure up
to 2TB o unied read cache in a storage
controller by using the 512GB PAM II card.
The ability to cache larger quantities o
active data makes PAM II cards eectiveacross an even broader set
o workloads.
autoMatiCally Put aCtiVe Data
WheRe aCCess Will Be ast
Our PAM amily caching modules put your
active data blocks in the storage controller,
speeding access by a actor o 10 or better
compared to disk.
PAM modules give you perormance that
is comparable to SSDs without creating
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www.netapp.com
MaXiMuM MoDules, aDDeD ReaD CaChe
PeR ha systeM
PaM
16gB
PaM ii
256gB
PaM ii
512gB
as6080, V6080 10 modules
160GB
8 modules
4TB
as6040, V6040,
as3170, V3170
8 modules
128GB
4 modules
2TB
as3070, V3070 4 modules
64GB
4 modules
1TB
as3160, V3160 4 modules
64GB
4 modules
1TB
as3140, V3140 4 modules
64GB
2 modules
512GB
n: 1. These specications are or a dual-controller, high
availability (HA) system.
Divide by 2 to get maximums or a single-controller
conguration.
2. PAM and PAM II modules cannot coexist in the same
controller.
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Latency is typically 10ms or higher when accessing
data rom disk drives. The PAM amily caching
modules reduce latency by a actor o 10 or more
compared to disk drives when there is a cache hit.
another storage tier. You dont need to
move data rom tier to tier or the best
perormance. Its all automatic because
every volume and LUN behind the storage
controller is subject to caching.
You can tune the Perormance Acceleration
Modules to match your specic workload by
using sotware settings that let you choose
rom three modes o operation.
You can also give caching priority to your
most important volumes and LUNs when
the load is heaviest by using our FlexShare
quality o service sotware in combination
with PAM amily modules.
ReDuCe Costs oR stoRage, PoWeR,
anD RaCK sPaCe
Using an industry standard benchmark* we
demonstrated that the original PAM caching
module can eliminate up to 50% o the disk
drives in a storage system with no change
to I/O throughput. Similar tests with a new
256GB PAM II module reduced the number
o disk drives by about 75%.
We also switched rom 15k RPM Fibre
Channel dr ives to ewer, larger SATA
drives with PAM cards in these tests. The
combination o SATA drives with PAM cards
increased storage capacity while providing
comparable perormance.
In summary, PAM cards can reduce the
purchase price o a storage system and
provide ongoing savings by consuming
less power, cooling, and rack space.
PReDiCt youR Results
You can use a sotware eature o the Data
ONTAP 7G operating system to determine
whether the perormance o your storage
system will improve with the addition o oneor more caching
modules. Predictive Cache
Statistics generates data that indicates
whether caching modules will help and how
much additional cache is optimal or your
workload.
NetApp creates innovative storage and
data management solutions that accelerate
business breakthroughs and deliver
outstanding cost eciency. Discover our
passion or helping companies around the
world go urther, aster at www.netapp.com.
* SPECss2008_ns.v3. Visit
http://spec.org/ss2008/results/ss2008ns.
html or more inormation. SPEC and SPECss2008 are registered
trademarks o the Standard Perormance Evaluation Corporation.
Copyright 2009 NetApp, Inc. All rights reserved. No portions
o
this document may be reproduced without prior written consent
o
NetApp, Inc. Specications are subject to change without
notice.
NetApp, the NetApp logo, Go urther, aster, and Data ONTAP,
and
FlexShare are trademarks or registered trademarks o NetApp, Inc.
in
the United States and/or other countries. All other brands or
products
are trademarks or registered trademarks o their respective
holders and
should be treated as such. DS-2811-0809
