Reducing Resync Time - NEC Express5800 Series Maintenance Manual

Chapter 2 Configuring and Upgrading the System

2.4.3 Reducing resync time

You can reduce the resync time to change the minimum resync speed from 1,000 KB/sec (default) to 200,000
KB/sec.
Run the following command to confirm the current speed.
The example below shows the default setting (minimum resync speed: 1,000 KB/sec, maximum resync
speed: 200,000 KB/sec).
# esxcli –s xxx.xxx.xxx.xxx storage mpm speedLimit
Volume Minimum Maximum
------ ------- -------
volume 1000
Run the following command to specify the minimum resync speed to 200,000 KB/sec for all disks.
# esxcli –s xxx.xxx.xxx.xxx storage mpm speedLimit --min=200000 --max=200000
Volume Minimum Maximum
------ ------- -------
volume 200000
To confirm or specify the minimum resync speed for individual disk, run the command with "-v <Device
name>". The example below shows that the command is run for device name mpm1.
# esxcli –s xxx.xxx.xxx.xxx storage mpm speedLimit -v mpm1 --min=200000
--max=200000
Volume Minimum Maximum
------ ------- -------
volume 200000
Note
The minimum resync speed affects system performance. If it is increased, the system
performance becomes lower, therefore care must be taken in changing configuration.
200000
200000
200000
The minimum/maximum resync speed is reverted when the ESXi host is rebooted. To use
Note
the setting persistently, let this command be run every time when the ESXi host is started.
Describe the following line in "/etc/rc.local.d/local.sh" file of ESXi host.
esxcli storage mpm speedLimit --min=200000 --max=200000
Refer to the Knowlede Base of VMware for how to describe the /etc/rc.local.d/local.sh file.
<VMware, Knowlede Base -Modifying the rc.local or local.sh file in ESX/ESXi to run
commands while booting (2043564)>
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC
&externalId=2043564
Express5800/R320c-E4, R320c-M4 Maintenance Guide (VMware)
2. Disk Operations
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