Dynamic Throttling; Thermal Throttling; Power Throttling; Mysql Settings - Seagate ST1100FR0000 User Manual

11.0 D T
YNAMIC HROTTLING
Dynamic throttling prevents unplanned or abrupt device shutdowns by lowering the IO performance of devices if power
consumption and/ or temperature of increases. Dynamic throttling is split into parts: thermal and power throttling.
11.1 T T
HERMAL HROTTLING
Thermal throttling reduces IO performance of X8 Accelerator devices if temperature goes above the default threshold
(T[throttle], default: 78°C). If temperature continues to increase and reaches 83°C the device is brought down to the lowest
IO performance. If temperature reaches 85°C (T[offline]), the device completely shuts down. However, if device cools down
and stays below T[throttle], the IO performance increases and brought back to maximum level.
11.2 P T
OWER HROTTLING
Power throttling reduces IO performance of X8 Accelerator devices if power consumption goes above the default threshold
of 24W. It comes in 2 modes: turbo and compliant mode. In turbo mode throttling is disabled while in compliant mode the
device is brought down to the lowest IO performance if power consumption exceeds 24W and stays above the threshold.
And when power consumption stays below the threshold value, IO performance increases and brought back - if possible, up
to the maximum level.
The throttling default settings: T[throttle], T[warning], T[offline], Turbo/
N
OTE
Compliant, Power Threshold, and IO Performance levels are done at factory.
12.0 M SQL S
Y ETTINGS
Both the Google and Percona patched versions of MySQL InnoDB and XtraDB support increasing IO threads. Through
extensive testing, Seagate recommends adding the following setting in /etc/my.cnf to enable the highest performance on the
Seagate X8 Accelerator device. Please contact Seagate support for more information on optimizing MySQL on the Seagate
X8 Accelerator device. A MySQL Performance Optimization paper is available on the Seagate web site
solutions/mysql/).
/etc/my.cnf
...
[mysqld]
innodb_write_io_threads=8
innodb_read_io_threads=8
innodb_io_capacity=10000
innodb_flush_method=O_DIRECT
S X8 A
EAGATE CCELERATOR
U G L , R
SER UIDE FOR INUX EV
. A
(www.seagate.com/
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