Difference between revisions of "Enmotus: Installation and set up"

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#options = type or inital mode of the volume
 
#options = type or inital mode of the volume
 
</syntaxhighlight>
 
</syntaxhighlight>
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 +
== Creating Single Disk-per-Tier tidsks ==
 +
 +
When combining a single pair of fast and slow devices together into a tdisk, there is no need to create intermediate vdisk devices and a single command can be used where device 1 is the fast device and device 2 is the slow tier.
  
 
<syntaxhighlight>
 
<syntaxhighlight>
 
evsp --create /dev/sdb /dev/sdc
 
evsp --create /dev/sdb /dev/sdc
 +
</syntaxhighlight>
 +
 +
There are three options that can be passed to determine the mapping of the fast and slow tiers to the logical blocks address space:
 +
 +
# fast_first  - the fast tier is placed at logical address 0
 +
# slow_first  - The slow device is placed at logical address 0
 +
# fast_part  - 20% of the fast tier is placed at logical address 0, with the remaining 80% placed at the end.
 +
 +
 +
== Creating Multi-Disk vdisk tiers ==
 +
 +
The create command can use two internal Enmotus disks as arguments instead of raw block devices.  In this case a vdisk needs to be preconfigured prior to being placed as a tier.
 +
 +
=== Creating vdisks ===
 +
 +
The tiering engine support pooling of physical disk drives in either a linear concatenation or stripe mode.  Striping is implemented around tiering page boundaries with a stripe size the same as the page size setting for the tdisk (default 4M). Up to a maxium of 16 devices can be combined into a pool, with valid modes of linear or stiping.
 +
 +
<syntaxhighlight>
 +
evsp --create vdisk <device1> <device2> ... {mode}
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</syntaxhighlight>
 +
 +
== Changing the default promote parameters and policies ==
 +
 +
The mode of the tiering engine may be changed from its default settings.  Promote thresholds, rates and policies can all be set up using the evsp command.
 +
 +
<syntaxhighlight>
 +
evsp --promote <mode> <tdevice>
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</syntaxhighlight>
 +
 +
The promote policy can be changed with the evsp command:
 +
 +
<syntaxhighlight>
 +
evsp --policy <mode> <tdevice>
 +
</syntaxhighlight>
 +
 +
=== Changing promote rates  ===
 +
 +
Promote options:
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 +
# aggressive
 +
# normal
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# slow
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 +
<syntaxhighlight>
 +
evsp --promote aggressive /dev/eba
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</syntaxhighlight>
 +
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=== Changing Promote Policies ===
 +
 +
Policy Options:
 +
 +
# rdio - decisions based on read io activity only
 +
#rwio - decisions based on read and write io activity
 +
#rdblock  - decisions based on read block volume activity
 +
#rwblock - decisions based on read and write block volume activity
 +
 +
<syntaxhighlight>
 +
evsp --policy rwio /dev/eba
 
</syntaxhighlight>
 
</syntaxhighlight>

Latest revision as of 10:30, 26 October 2015

Installation

Run the binary provided.... 

./FuzeDriveServer_install_linux64_XXXX

Install the licence... 

evsp --license AAAA-BBBB-CCCC-DDDD

Check the licence... 

evsp --license

Create a Fuze Drive

There are several pssoble ways to create a tiered volume, depending on the number and configuration of the disk required. Before creating a disk you will need to list the available disks that can be used: List the available drives: 

evsp --list

The general create command is mused to make intermediate virtual volumes (vdisks) that form the tiers as well as the tiered volumes (tdisks).

The command follows a set format: 

evsp --create <disk-type> <device1> <device2> ... {options}

#disk-type = vdisk or tdisk
#device = the disks to be used
#options = type or inital mode of the volume

Creating Single Disk-per-Tier tidsks

When combining a single pair of fast and slow devices together into a tdisk, there is no need to create intermediate vdisk devices and a single command can be used where device 1 is the fast device and device 2 is the slow tier. 

evsp --create /dev/sdb /dev/sdc

There are three options that can be passed to determine the mapping of the fast and slow tiers to the logical blocks address space:

  1. fast_first - the fast tier is placed at logical address 0
  2. slow_first - The slow device is placed at logical address 0
  3. fast_part - 20% of the fast tier is placed at logical address 0, with the remaining 80% placed at the end.


Creating Multi-Disk vdisk tiers

The create command can use two internal Enmotus disks as arguments instead of raw block devices. In this case a vdisk needs to be preconfigured prior to being placed as a tier.

Creating vdisks

The tiering engine support pooling of physical disk drives in either a linear concatenation or stripe mode. Striping is implemented around tiering page boundaries with a stripe size the same as the page size setting for the tdisk (default 4M). Up to a maxium of 16 devices can be combined into a pool, with valid modes of linear or stiping. 

evsp --create vdisk <device1> <device2> ... {mode}

Changing the default promote parameters and policies

The mode of the tiering engine may be changed from its default settings. Promote thresholds, rates and policies can all be set up using the evsp command. 

evsp --promote <mode> <tdevice>

The promote policy can be changed with the evsp command: 

evsp --policy <mode> <tdevice>

Changing promote rates

Promote options:

  1. aggressive
  2. normal
  3. slow
evsp --promote aggressive /dev/eba

Changing Promote Policies

Policy Options:

  1. rdio - decisions based on read io activity only
  2. rwio - decisions based on read and write io activity
  3. rdblock - decisions based on read block volume activity
  4. rwblock - decisions based on read and write block volume activity
evsp --policy rwio /dev/eba
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