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Friday, March 31, 2017
 
osc-setcoremem: A Brief Introduction

Target Audience: Oracle SuperCluster Customers

On a high-level, osc-setcoremem is a SuperCluster tool that assists in making changes to the CPU and memory configurations of one or more dedicated domains running on a SuperCluster compute node. osc-setcoremem helps in removing (park) resources from dedicated domains for licensing purposes. Also using osc-setcoremem, some of the CPU and memory resources can be removed from one dedicated domain and added to remaining dedicated domains. Root domains are ignored by default.

Any user with no prior knowledge of Oracle VM Server for SPARC (also known as Logical Domains) administration, and how the operating system organizes CPU and memory resources into different locality groups (lgroups) can easily reconfigure the dedicated domains to achieve desired (or in some cases close to the desired) CPU, memory configurations. Only those users with root privileges can run the tool.

osc-setcoremem is currently supported on all SuperCluster platforms -- T4-4, T5-8, M6-32 and M7. User can change the CPU, memory configurations at Socket or Core granularity. For the complete list of supported functionality along with known limitations, please review the Configuring CPU and Memory Resources section in Oracle SuperCluster M7 Series Administration Guide.

Here is a sample interactive osc-setcoremem session that changes the CPU, memory configuration of couple of dedicated domains on a SuperCluster M6-32 compute node.

# /opt/oracle.supercluster/bin/osc-setcoremem

                              osc-setcoremem
                    v2.3  built on Jan 30 2017 11:48:13

 Current Configuration: SuperCluster Fully-Populated M6-32 Base

 +----------------------------------+-------+--------+-----------+--- MINIMUM ----+
 | DOMAIN                           | CORES | MEM GB |   TYPE    | CORES | MEM GB |
 +----------------------------------+-------+--------+-----------+-------+--------+
 | primary                          |    24 |   2048 | Dedicated |     2 |     32 |
 | ssccn1-dom1                      |    24 |   2048 | Dedicated |     2 |     32 |
 | ssccn1-dom2                      |    24 |   2048 | Dedicated |     2 |     32 |
 | ssccn1-dom3                      |     2 |     32 |   Root    |     2 |     32 |
 +----------------------------------+-------+--------+-----------+-------+--------+
 | Parked Resources (Approx)        |    22 |   2016 |    --     |    -- |   --   |
 | Memory in Use by _sys_ Pool      |    -- |   1.25 |    --     |    -- |   --   |
 +----------------------------------+-------+--------+-----------+-------+--------+

 [ INFO ] following domains will be ignored in this session.

 Root Domains
 ------------
 ssccn1-dom3

 CPU Granularity Preference:

        1. Socket
        2. Core

 In case of Socket granularity, proportional memory capacity is
  automatically selected for you.

 Choose Socket or Core [S or C] C

 Step 1 of 2: Core Count

 primary      : specify number of cores [min: 2, max: 68. default: 24] : 30
                you chose [30] cores for primary domain

 ssccn1-dom1  : specify number of cores [min: 2, max: 40. default: 24] :
                you chose [24] cores for ssccn1-dom1 domain

 ssccn1-dom2  : specify number of cores [min: 2, max: 18. default: 18] : 12
                you chose [12] cores for ssccn1-dom2 domain


 Configuration In Progress After Core Count Selection:

 +----------------------------------+-------+--------+-----------+--- MINIMUM ----+
 | DOMAIN                           | CORES | MEM GB |   TYPE    | CORES | MEM GB |
 +----------------------------------+-------+--------+-----------+-------+--------+
 | primary                          |    30 |   2048 | Dedicated |     2 |    128 |
 | ssccn1-dom1                      |    24 |   2048 | Dedicated |     2 |     96 |
 | ssccn1-dom2                      |    12 |   2048 | Dedicated |     2 |     64 |
 | *ssccn1-dom3                     |     2 |     32 |   Root    |     2 |     32 |
 +----------------------------------+-------+--------+-----------+-------+--------+
 | Parked Resources (Approx)        |    28 |   2016 |    --     |    -- |   --   |
 | Memory in Use by _sys_ Pool      |    -- |   1.25 |    --     |    -- |   --   |
 +----------------------------------+-------+--------+-----------+-------+--------+


 Step 2 of 2: Memory Capacity
        (must be 16 GB aligned)

 primary      : specify memory capacity in GB [min: 128, max: 4032. default: 2048] : 2816
                you chose [2816 GB] memory for primary domain

 ssccn1-dom1  : specify memory capacity in GB [min: 96, max: 2048. default: 2048] :
                you chose [2048 GB] memory for ssccn1-dom1 domain

 ssccn1-dom2  : specify memory capacity in GB [min: 64, max: 1280. default: 1280] : 512
                you chose [512 GB] memory for ssccn1-dom2 domain


 Configuration In Progress After Memory Capacity Selection:

 +----------------------------------+-------+--------+-----------+--- MINIMUM ----+
 | DOMAIN                           | CORES | MEM GB |   TYPE    | CORES | MEM GB |
 +----------------------------------+-------+--------+-----------+-------+--------+
 | primary                          |    30 |   2816 | Dedicated |     2 |    128 |
 | ssccn1-dom1                      |    24 |   2048 | Dedicated |     2 |     96 |
 | ssccn1-dom2                      |    12 |    512 | Dedicated |     2 |     64 |
 | *ssccn1-dom3                     |     2 |     32 |   Root    |     2 |     32 |
 +----------------------------------+-------+--------+-----------+-------+--------+
 | Parked Resources (Approx)        |    28 |   2784 |    --     |    -- |   --   |
 | Memory in Use by _sys_ Pool      |    -- |   1.25 |    --     |    -- |   --   |
 +----------------------------------+-------+--------+-----------+-------+--------+


 [ INFO ] Equivalent non-interactive input string for the record:
         /opt/oracle.supercluster/bin/osc-setcoremem -type core -res 30/2816:24/2048:12/512

 Following domains will be restarted:

        ssccn1-dom2

 This configuration change requires rebooting the Control Domain.
 Do you want to proceed? Y/N : y

 IMPORTANT NOTE:

 |  After the reboot, osc-setcoremem attempts to complete CPU, Memory reconfiguration.
 |  Please check syslog and the state of all domains before using the system.
 |  eg.,  dmesg | grep osc-setcoremem ; ldm list | grep -v active ; date

 Please wait while osc-setcoremem is setting up the new CPU, memory configuration.
 It may take a while. Be patient and do not interrupt.


 Executing ldm commands ..

0%    10    20    30    40    50    60    70    80    90   100%
|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|
*=====*=====*=====*=====*=====*=====*=====*=====*=====*=====*

Broadcast Message from root (pts/1) on sschost02 Fri Mar 31 16:03:13...
THE SYSTEM sschost02 IS BEING SHUT DOWN NOW ! ! !
Log off now or risk your files being damaged

        Task complete with no errors.

SEE ALSO:

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Wednesday, March 15, 2017
 
Word List #2

WORD MEANING
 
polemic a strong verbal or written attack on someone or something
 
emeritus having retired but allowed to retain their title as an honor
 
yank (short for yankee) slang for someone of American origin or heritage
 
pejorative expressing contempt or disapproval
 
gander look or glance at something (eg., take a gander at sth)
 
valiant showing courage or determination (eg., a valiant effort to do sth)
 
recuse to remove (oneself) from participation to avoid a conflict of interest
 
consigliere an adviser esp to a crime boss
 
hankering a strong desire to have or do something
 
crib copy (another person's work) illicitly or without acknowledgment
 
flummox perplex (someone) greatly; bewilder
 
ensconce establish or settle (someone) in a comfortable, safe, or secret place
 
ad hominem (of an argument or reaction) directed against a person rather than the position they are maintaining
 
vis-a-vis in relation to; with regard to
 
nascent (esp of a process or organization) just coming into existence and beginning to display signs of future potential
 
forage (of a person or animal) search widely for food or provisions
 
amble walk or move at a slow, relaxed pace
 
brook a small stream
 
compunction a feeling of guilt or moral scruple that prevents or follows the doing of something bad
 
vacuous having or showing a lack of thought or intelligence; mindless
 
mete dispense or allot justice, a punishment, or harsh treatment
 
glower have an angry or sullen look on one's face; scowl
 
disseminate spread or disperse (something, esp information) widely
 
germane relevant to a subject under consideration
 
veritable used as an intensifier, often to qualify a metaphor
 

25 words

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Saturday, March 04, 2017
 
Blast from the Past : The Weekend Playlist #11

Previous playlists:

    #1    #8 (50s, 60s and 70s)    |    #2    #3    #4    #5 (80s)    |    #6    #7    #9 (90s)    |    #10 (Instrumental)

New category: "00s" (2000s) playlist. Audio & Widget courtesy: Spotify

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