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Samsung PM853T SSD
for mail servers
Exceptional performance and cost-efficiency
specifically designed for mail server use
2
Reduce mail server maintenance costs while satisfying workload demands
Keep mail servers running smoothly and TCO low with
high-performance Samsung SSDs
workloads pose the biggest challenge to data center mail servers that
Typically, traditional HDDs have been used for data centers but more
Storage requirements for email servers can vary depending on the
recently data centers are migrating to SSDs to boost performance,
email size, number of emails, type and number of users. While small
save space and reduce maintenance costs, resulting in an overall
departmental email servers may need limited storage and features,
reduction in total cost of ownership (TCO). Data centers are realizing
large corporate ones require greater storage capacity and a high
the benefits of SSDs in mail server applications in particular.
level of availability, performance and scalability. Of course, the server
Mail servers are used in virtually all businesses and are responsible
for communication within and outside organizations. Communications
include mail traffic, Short Message Service (SMS) and a variety of
other messaging. Whether using laptops, mobile phones or tablets,
employees need to access company resources through the Internet
wherever they may be.
Data centers that continue to use HDDs for their mail servers are
finding poor latency rates due to the drives' spinning magnetic disks
and the mechanical action of their head arms, which create a delay
in data retrieval and ultimately slow down the speed of the entire
system. The latency rate of HDDs is measured in tens of milliseconds
to hundreds of milliseconds compared to microseconds with SSDs.
The Input/Output (I/O) bottleneck with most mail servers is caused
still use HDDs.
workload varies depending on the number of users, and the size of
the emails and their attachments. Transactions performed by the
users mainly include writing new emails (write), reading emails (read),
replying to existing ones (append) and deleting them (write). All these
transactions happen in parallel, and vary in size and volume.
Often a single mail server will provide mail server solutions to several
organizations of various sizes and process multiple transactions a
day. For example, if a mail server supports ten thousand users, the
server must be able to process ten thousand transactions a second,
placing a higher demand on HDDs. From a user experience (UX)
perspective, the user expects to be able to send, read or delete
emails within a one-second mouse click; hence the need for ten
thousand transactions per second when serving ten thousand users.
by high disk queuing. And, as the number of I/O workloads pending
Samsung has developed the PM853T SSD specifically tailored to
on the device queue bottlenecks, the disk queuing increases thereby
meet taxing mail server volume demands while reducing TCO.
reducing the system performance as a whole. As a result, heavy
3
Compare the performance of the Samsung PM853T SSD
to a typical data center HDD
Weigh the advantages of the Samsung PM853T SSD
server operations simultaneously with ten thousand users sending
In order to accurately test the performance of its PM853T SSD in a
real mail server scenario, Samsung tested it against an HDD that is
widely used in the data center field. To simulate real-world workloads
and actual mail server traffic, Samsung used the popular mail
server benchmarking tool Postmark™,1 widely used by various SSD
and receiving mail every second. Each user had two gigabytes of mail
capacity. Plus, all performance measurements were executed under
the steady state of the SSD rather than in the Fresh Out of the Box
(FOB) state, which typically has a much higher write performance
than later on.
manufacturers and other Original Equipment Manufacturer (OEM)
When compared with typical data center HDDs, the Samsung
vendors to benchmark their SSDs in the mail server environment.
PM853T SSDs delivered higher transactions per second (TPS),
Postmark performs operations such as read, append, create and
less procurement costs, lower power consumption, higher storage
delete, replicating real-world scenarios.
capacity and a higher endurance rating.
Samsung used four threads of the Postmark tool to simulate the
assumed workloads of four organizations performing random mail
Test Environment
System Configuration
Host Interface
Proccssor Used
Intel(R) Xeon(R) CPU E5-2690 v2 @ 3.00GHz
Motherboard
HP, ProLiant DL380p Gen8
NO.of CPU
40
RAM
256 GB
OS
RHEL 7.0, 3.10.0-123.6.3.el7x86_64
Mode
AHCI
Size
960GB
Model
MZ-7GE960
Firmware
EXT0303Q
Conneeted as
Secondary Storage (ext4 File system)
Size
1 TB
Model
ST91000640NS
Connected as
Secondary Storage (ext4 File system)
SSD
HDD
RAID
RAID 5 with 8 HDDs / SSDs
Tool
Postmark v1.5
Table 1. Mail server test environment
4
Generate higher throughput regardless of the transaction volume
Maintain high TPS rates during workload fluctuations
Total TPS Comparison
4000
In the TPS tests under a Postmark workload, the Samsung PM853T
SSDs produced overwhelmingly superior performance in transaction
The graph in Figure 1 depicts the total TPS for all transactions and
3000
Total TPS
processing capabilities compared with the HDDs.
3460
2000
1000
detailed TPS in each thread of eight Samsung PM853T SSDs and
452
eight data center HDDs in a Redundant Array of Independent Disk
0
(RAID) 5 environment for all mail server workloads. The results
demonstrate that the PM853T SSDs performed 7.6 times faster than
TPS Comparison in Each Thread
the HDDs in a mail server environment.
1200
1029
These results further demonstrated that the PM853T SSDs are able
900
much higher throughputs in spite of the increasing number of initial
emails from 50K to 500K, concluding that the PM853T SSDs are the
preferred choice for mail servers.
TPS
to accept all transactions that can be generated by different kinds
of organizations. In addition, the PM853T SSDs steadily showed
896
769
766
600
300
115
115
116
106
0
50K
100K
200K
500K
Number of Inltial Mails
Data center HDD
Samsung PM853T SSD
Figure 1. Completion time and TPS comparison between the PM853T
and the data center HDD
5
Lower TCO with less procurement costs
Process more transactions with less equipment outlays
In order for a data center to run profitably, it needs to store as much
Samsung SSDs
Setup Required
HDDs
Quantity
Approx.
Cost
Quantity
Approx.
Cost
Number of
devices
24
$21,5762
184
$46,0003
Number of Servers
needed
1
$6,5294
1
$6,529
Number of
Enclosures needed
0
$0
7
$23,7935
storage setup, performance test results were 3,460 TPS. To fulfill the
External HBAs
needed
0
$0
1
$7996
performance requirement of 10K TPS, 3* (10K TPS / 3,460 TPS) are
Total Cost
-
$28,105
-
$77,121
data on a drive as possible to reduce costly device expenditures.
That's why the PM853T SSD is the ideal option for reducing
procurement costs when compared with HDDs. To put these costs
into perspective, it would take 184 HDDs to achieve ten thousand
TPS data management functions compared to only 24 PM853T
SSDs. The reason being is that HDDs can typically perform only 452
TPS. However, when PM853T SSDs were installed using a RAID 5
needed for RAID 5 storage. Since each RAID 5 storage setup consists
of 8 SSDs, a total of 24 PM853T SSDs are needed, compared
with a total of 184 HDDs necessary to fulfill the same performance
Table 2. Approximate procurement costs of a mail server setup with
SSDs versus HDDs*
requirements.
* Please note : These figures are merely approximations and can vary
* The exact value of 2.8 has been rounded up for practical usage purposes.
depending on the equipment usaed and the manufacturers.
For example, in the previously discussed user scenario, with 10K
HDD Configuration
users and assuming each user has stored a large amount of the 2
GB of space on the server, the total space needed would be 20 TB.
Using the RAID 5 setup, 24 SSDs would provide nearly 20 TB, which
9 HDDs
would satisfy the storage requirements. On the other hand, 184 HDDs
25 HDDs
provide approximately 155 TB of space, which is considerably more
space than required to meet the needs of the 10K users. Therefore,
25 HDDs
mail server data centers only need to procure the storage capacity
25 HDDs
they need when choosing SSDs.
25 HDDs
In addition, to house 184 HDDs in a RAID 5 configuration, only 25
25 HDDs
HDDs would able to be placed in a server. The remaining HDDs
25 HDDs
would need to be housed in seven disk enclosures, with 25 HDDs
in each enclosure. Using this setup, the data center would still need
Disk Enclosuse
Server
25 HDDs
to purchase an external RAID controller to be able to connect the
disk enclosures to the server, further increasing TCO. Since a typical
SSD Configuration
server can house up to 25 SSDs, a mail server can be configured
with just one server using SSDs.The estimated procurement costs for
setting up the below HDD and SSD mail servers are shown in Table 2.
24 SSDs
Server
6
Reduce power consumption and maintain a high endurance rating
Save costs with the highly power-efficient PM853T SSD
Usually, HDDs consume more power than SSDs because of their
mechanical disk movements. A typical data center HDD consumes
5.21 Watts in one hour whereas the Samsung PM853T SSD
consumes just 3.25 W in an hour,7 which equates to nearly 40 percent8
less power consumption than the data center HDD. In addition, HDDs
generally generate more heat than SSDs due to their moving parts.
Considering that 70 percent of actual power consumed by both SSDs
and HDDs is needed for cooling purposes,9 clearly a large amount of
Taking these statistics into consideration, the total amount of data
bytes written to an SSD in the mail server environment with 10K
users is approximately 295 GB of data written to 24 SSDs in the mail
server setup per day. Factoring in that the write endurance limit of
the PM853T is 1.1 TB a day per SSD in an email server, the actual
data written is close to 295 GB per day, which is much less than the
maximum limit. These calculations conclude that the PM853T SSD
has high endurance and is able to sustain the writes needed in a mail
server scenario.
energy is devoted to cooling an HDD alone.
Parameters
Number of Devices
Needed
Procurement Cost
(Devices, Servers, Enclosures)
Data Center
HDD
Samsung
PM853T SSD
Leverage performance and efficiency in an SSD that lowers
TCO
184
24
In summation, when compared with a traditional HDD, the Samsung
PM853T SSD provides higher random I/O throughput with less
$77,121
$28,105
Power Consumption
Cost on Devices (5 Years)
$5,038.61
$409.97
Cooling Power Consumption
Cost on Devices (5 Years)
$3,527.03
$286.98
$85,686.64
$28,801.95
TCO
response time at a lower cost. In addition, the PM853T SSD is
physically denser, costs less per gigabyte in the long term and
consumes less energy. The PM853T also supports a significantly
higher transaction rate than HDDs, which improved overall throughput
Table 3. TCO comparison of PM853T and data center HDD
and the user experience (UX).
Along with the impressive comparisons, the PM853T boasts
innovative features such as an advanced Error-Correcting Code (ECC)
engine, enhanced end-to-end data security, power-loss protection, a
host of SMART features, thermal throttling and full support for robust
storage architecture.
Sustain write performance with high endurance rates
Normally, the endurance rate of an SSD is determined in terms of
Drive Writes Per Day (DWPD). DWPD for a PM853T SSD with a mail
server workload is 1.2. This clearly conveys that the maximum of
1.1 TB (1.2 x 960 GB) per day can be written to a PM853T SSD for a
5-year warranty period. According to statistical research performed
The Samsung PM853T SSD is engineered to meet the high
performance demands of mail servers, while simultaneously reducing
power and cooling costs, resulting in effectively reducing TCO.
Factoring in all these benefits, it is clear why the Samsung PM853T
SSD is the smart choice for mail server applications.
by a well-known firm, the average number of emails sent and received
All data and test results aforementioned in this brochure were
by a user per day in a corporate organization is 12110 with the average
determined within a Samsung data lab and are subject to change
mail size considered to be 256 KB.
based on varying conditions and their specific circumstances.
7
Technical Specification
Samsung PM853T
Capacity
240 GB, 480 GB, 960 GB is available
Application
Mixed and read-centric usages are recommended
Weight
63 g (2.22 oz)
Dimensions
(L x W x H)
100.2 ± 0.25 x 69.85 ± 0.25 x 6.8 ± 0.2 mm (3.94 ± 0.01 x 2.75 ± 0.01 x 0.27 ± 0.01 in.)
Interface
Serial ATA 6 Gbps (Compatible with SATA 3 Gbps and STAT 1.5 Gbps)
Form factor
2.5 inch
NAND flash memory
Samsung 19nm toggle 3-bit MLC NAND
For the thickness size, drive label thickness was included
Host transfer : 600 MB/s
Sequential read : Up to 530 MB/s
Sequential write : Up to 410 MB/s (480 GB, 960 GB)
Performance
Up to 270 MB/s (240 GB)
Random read : Max. 87,000 IOPS (4 KB, QD 32)
Random write : Max. 15,000 IOPS (960 GB)
Max. 13,000 IOPS (480 GB)
Max. 12,000 IOPS (240 GB)
Quality of service
(99.9%)
4 KB, QD = 1
Read : 0.2 ms / Write : 4 ms
4 KB, QD = 32
Read : 0.6 ms / Write : 7 ms
Read (4 KB)
115 us (240 GB. 480 GB), 110 us (960 GB)
Write (4 KB)
65 us (240 GB), 55 us (480 GB), 50 us (960 GB)
Latency
Reliability
1,500,000 hours Mean Time Between Failures (MTBF)
Terabytes written
(Best / Worst)
240 GB : 695 TB / 165 TB
480 GB : 1,390 TB / 330 TB
960 GB : 2,780 TB / 665 TB
Power consumption
Temperature
Active read / write : 2.6 Watt / 3.4 Watt
Idle : 1.1 Watt
Operating : 0°C to 70°C (32°F to 158°F)
Non-operating : -55°C to 95°C (-67°F to 203°F)
Humidity
5% to 95%, non-condensing
Vibration
7 ~ 800 Hz, 3.08 Grms, 30 min / axis (X,Y,Z)
Shock
1,500 G, duration 0.5 m sec, Half Shin Wave
Certification
BSMI, KCC, VCCI, C-Tick, FCC, IC, UL, TUV, and CV
8
Legal and additional information
Postmark is a trademark of Wildbit, LLC.
About Samsung Electronics Co., Ltd.
1. Postmark Tool, http://www.filesystems.org/docs/auto-pilot/Postmark.
html ; Postmark Tool Instructions, http://www.dartmouth.edu/~davidg/
postmark_instructions.html
Samsung Electronics Co., Ltd. inspires the world and shapes the
2. SSD Cost http://www.samsung.com/us/business/computing/solidstate-drives/MZ-7GE960EW
digital appliances, printers, medical equipment, network systems and
3. HDD Cost, http://www.seagate.com/products/enterpriseservers-storage/nearline-storage/enterprise-capacity-2-5hdd/?sku=ST91000640NS
through, among others, our Digital Health and Smart Home initiatives.
4. Server Cost, http://shopping1.hp.com/is-bin/INTERSHOP.enfinity/
WFS/WW-USSMBPublicStore-Site/en_US/-/USD/ViewProductDetail-Star
t;pgid=jDJwlVlq2W9SR0Yk2kO1Yuen0000Zj4hdWXm;sid=tc2lsVXpL8um
sQHf1Gi5OI3mZ8OdwJCItms=?ProductUUID=aqIQ7EN5WfgAAAFGMVk
TA48g&CatalogCategoryID=.o8Q7hacfswAAAE1A3ITSTR8
blog at global.samsungtomorrow.com.
5. HP D2700 Disk Enclosure Cost, http://shopping1.hp.com/is-bin/
INTERSHOP.enfinity/WFS/WW-USSMBPublicStore-Site/en_US/-/USD/
ViewProductDetail-Start?ProductUUID=aVcQ7EN5m9EAAAEtBhJVIOI9&
CatalogCategoryID=jPEQ7habWNcAAAEyqIE8nozl&JumpTo=OfferList
6. External HBA Controller Cost, http://shopping1.hp.com/is-bin/
INTERSHOP.enfinity/WFS/WW-USSMBPublicStore-Site/en_US/-/USD/
ViewProductDetail-Start?ProductUUID=zS0Q7EN5DC0AAAEy6yFLuIs_&
CatalogCategoryID=
7. HDD Power Management, Data Sheet Design Small and Deliver BIG—
2.5-Inch, Eco-Friendly Nearline Drive http://www.seagate.com/wwwcontent/product-content/constellation-fam/constellation/constellation-2/
en-us/docs/constellation2-fips-ds1719-4-1207us.pdf
8. SSD Power Management, SAMSUNG SSD 845DC EVO
OUTSTANDING PERFORMANCE AND RELIABILITY SPECIFICALLY
ENGINEERED FOR DATA CENTER USE, in Specifications Page-6 http://
www.samsung.com/us/system/consumer/product/mz/7g/e9
9. SynJet: Low-Power “Green” Cooling in Data Center Cooling costs
Page-2 http://www.nuventix.com/files/uploaded_files/Low%20
Power%20Cooling.pdf
future with transformative ideas and technologies, redefining the
worlds of TVs, smartphones, wearable devices, tablets, cameras,
semiconductors. We are also leading in the Internet of Things space
We employ 307,000 people across 84 countries. To discover more,
please visit our official website at www.samsung.com and our official
For more information
For more information about Samsung SSD PM853T for mail servers,
visit www.samsung.com/business/ssd or www.samsungssd.com
Copyright © 2015 Samsung Electronics Co., Ltd. All rights reserved. Samsung
is a registered trademark of Samsung Electronics Co., Ltd. Specifications
and designs are subject to change without notice. Nonmetric weights and
measurements are approximate. All data were deemed correct at time of
creation. Samsung is not liable for errors or omissions. All brand, product,
service names and logos are trademarks and/or registered trademarks of their
respective owners and are hereby recognized and acknowledged.
Samsung Electronics Co., Ltd.
416, Maetan 3-dong,
Yeongtong-gu
Suwon-si, Gyeonggi-do 443-772,
Korea
www.samsung.com
2015-07
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