Advice on allocating SAN storage to a virtual database server on VMware Post: 303027928

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Operating Systems Linux Red Hat Advice on allocating SAN storage to a virtual database server on VMware Post 303027928 by gull04 on Friday 28th of December 2018 09:26:22 AM

12-28-2018

Registered User

Hi dkmartin,

In essence that is correct, but there are a number of caveats - as I said earlier if you have tiered storage and depending on how it is configured things change.

If we take an example of a single LUN it is likely to be sliced up along the lines of what you expect usage to be with with a single slice assigned to each VG, you have to bear in mind that this single LUN may be accross many spindles at the back end - this is invisible to the system.

As an example in our VNX which has three tiers of disk at the end of the 8*16Gb agregated fibres (4 on fabric A and 4 on Fabric B) the breakdown of the system build is 30Tb of SSD for tier 1, 90Tb of 15K RPM SAS for tier 2 and 120Tb of SATA for tier 3. This has been carved into disk groups which are then sub-divided into LUN's, however the ratio of disk 1:3:4 assigned to each LUN and the intelligence of the VNX means that the parts of the system experiencing sgnificant I/O are moved dynamically to the tier 1 disk allocated to that particular LUN.

Each of the disk groups mentioned above comprises a number of physical disks, strangely enough in the 1:3:4 ratio for SSD, SAS and SATA generally twenty something disks given the sizes of the disks in the VNX.

So following the logic of your 1Tb Lun you would have available 125Gb of SSD that you do not have to manage, the system does it for you. It may well be that the storage technology you have is much older and that it does not thave this functionallity, in that case you'll have to provide a bit more information about the setup.

Regards

Gull04

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LEARN ABOUT SUNOS

list-virtual-servers

asadmin-list-virtual-servers(1AS)				   User Commands				 asadmin-list-virtual-servers(1AS)

NAME

       asadmin-list-virtual-servers, list-virtual-servers - gets the virtual servers

SYNOPSIS

       list-virtual-servers --user admin_user [--password admin_password] [--host localhost] [--port 4848] [--secure|-s] [--passwordfile filename]
       [--terse=false] [--echo=false] [--interactive=true]

       Gets all the virtual server elements. This command is supported in remote mode only.

OPTIONS

       --user		       authorized domain application server administrative username.

       --password	       password to administer the domain application server.

       --host		       machine name where the domain application server is running.

       --port		       port number of the domain application server listening for administration requests.

       --secure 	       if true, uses SSL/TLS to communicate with the domain application server.

       --passwordfile	       file containing the domain application server password.

       --terse		       indicates that any output data must be very concise, typically avoiding human-friendly sentences and favoring well-
			       formatted data for consumption by a script. Default is false.

       --echo		       setting to true will echo the command line statement on the standard output. Default is false.

       --interactive	       if set to true (default), only the required password options are prompted.

       Example 1: Using list-virtual-servers

       asadmin> list-virtual-servers --user admin --password adminadmin
       --host localhost --port 4848
       Command list-virtual-servers executed successfully

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

       asadmin-create-virtual-server(1AS), asadmin-delete-virtual-server(1AS)

J2EE 1.4 SDK							    March 2004					 asadmin-list-virtual-servers(1AS)