#Emc powerpath license cost install#
#Emc powerpath license cost software#

The default throttle of 2 was a bit too high for this particular server so I tuned it back to a throttle of 3. Powermig throttle -handle -throttlevalue Migration speed is governed by the throttle value associated with the session.В The throttle ranges from 0-9, 0 being the fastest mode and 9 the slowest: Next up, start the sessions with the sync command: Make a note of these handles since youвЂ™ll need them with future commands. The command will output a handle for each session. More on the various throttles further down in this post. Powermig setup -src -tgt -techType hostcopyДЄdditionally you can add -throttlevalue to govern the speed of the migration.В If you donвЂ™t specify a custom throttle it will default at 2. Now weвЂ™ve got all the information, letвЂ™s start the migration!Д¬reate the migration sessions with the following syntax: The target devices are identical in size: harddisk11 and harddisk12. The pseudo names for these devices are harddisk1 and harddisk2. In this specific scenario weвЂ™re migrating two Commvault backup LUNs, each 5,5TB. Look up the names of your source and target devices: running the вЂњpowermt display dev=allвЂќ command on the server is the easiest method.

PowerPath Migration Enabler uses the pseudo devices created by PowerPath. As long as PowerPath sees it, youвЂ™re set. Assign your LUN to the server, make sure PowerPath recognizes it correctly, then STOP! Do not initialize/format the disk, assign drive letters or all that other nonsense. This LUN needs to be equal in size or larger and should not be in use by any application. Starting your PowerPath Migration Enabler Host Copy migrationДЇirst of all, assign your new storage to the server. Once the initial sync completes: switch over to your target storage.Setting up the PowerPath Migration Enabler Host Copy sessions.

#Emc powerpath license cost software#

Since youвЂ™re trying to migrate data non-disruptively in the first place, this reboot is annoying or even impossible in some environments.ДЄssuming the software is in place, the migration consists of the following steps:

#Emc powerpath license cost install#

This is a big, big advantage since adding PowerPath Migration Enabler to your install afterwards (officially) requires a reboot. Starting from PowerPath 5.7 SP1 itвЂ™s installed by default and no longer needs a separate license.

Prior to version 5.7 SP1 you had to install and license it separately. PowerPath Migration Enabler is a component of PowerPath. You can throttle its migration speed, your вЂњoldвЂќ data is left intact (so youвЂ™ve got a fallback) and once youвЂ™ve gotten use to the commands itвЂ™s childвЂ™s play to migrate non-disruptively and quickly. IвЂ™ve grown especially fond of PowerPath Migration Enabler due to its ease of use. Which option you choose depends on a lot of factors, including the environment youвЂ™re in, the amount of downtime you can afford, the amount of data, etc. When migrating servers from one storage system to another there are basically two options: Migrate using storage features like SAN Copy or MirrorView, or migrate using server based tools like PowerPath Migration Enabler Host Copy, VMware Storage VMotion or Robo Copy.