The data volume that organizations are building, analyzing and storing is larger than ever before. Only the organization that is able to faster deliver insights and manage fast-growing infrastructure can be the leader in the industry. To deliver these insights, the foundational storage of an enterprise must be able to support both the Big Data in the new era and traditional applications and provide excellent security, reliability and high performance. As a high-performance solution for managing large-scaled data, IBM Spectrum Scale provides unique archiving and analytics capabilities to help you address these challenges.
Experiment: QoS Current-Limiting Demonstration
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Experiment Content:
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The purpose of this lab is to understand the basic operations and concepts of the QoS policy for IBM Storage Scale parallel file systems.
Experiment Resources:
IBM Storage Scale 5.1.1 software
Red Hat Enterprise Linux 8.3 (VM)
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Discovery:QoS Current-Limiting Demonstration
13 already completed
Experiment Content:
The purpose of this lab is to understand the basic operations and concepts of the QoS policy for IBM Storage Scale parallel file systems.
Experiment Resources:
- IBM Storage Scale 5.1.1 software
Red Hat Enterprise Linux 8.3 (VM)
Tips
1. Discovery provides longer time for your experience;you are home free
2. Data will be cleared after the end of discovery
3. It is needed to finish the experiment and challenge first to start your discovery
Experiment Manual
The following content is displayed on the same screen for your experiment so that you can make any necessary reference in experiment. Start your experiment now!
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Open IBM Storage Scale command line interface(Duration: 3 mins)
Click
terminal - root@gpfs10...at the top of the experiment desktop
Open IBM Spectrum Scale command line interface
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Create a Fileset for QoS(Duration: 5 mins)
We are going to limit the current I/O in /ibm/gpfs/qos directory
2.1 Create a fileset named qos and connect it to the /ibm/gpfs/qos directory
mmcrfileset gpfs qosmmlinkfileset gpfs qos -J /ibm/gpfs/qos2.2 Viewing fileset information
mmlsfileset gpfs2.3 Enter the fileset directory created above
cd /ibm/gpfs/qos -
Enable QoS for filesystem(Duration: 5 mins)
QoS is an attribute of the Spectrum Scale file system, which is disabled by default. Here we enable the QoS function for the file system named gpfs
3.1 Enable QoS function of the file system
mmqos filesystem enable gpfs3.2 View the QoS status of the current file system
mmqos fs status gpfs -
Create User Class(Duration: 5 mins)
4.1 Create a user class for the fileset named qos
mmqos class create gpfs --class "Class1" --fileset qos4.2 View Class information of the current file system
mmqos class list gpfs -
Create the throttle for speed limit condition (Duration: 5 mins)
5.1 Set the throttle for Class1, and there is unlimited
mmqos throttle create gpfs --pool system --class Class1 -C all_ local --maxiops unlimited --maxmbs unlimited5.2 View speed limit information
mmqos throttle list gpfs5.3 Via dd command to write 1000MB data and observe the speed limit (Note: it can be measured several times to check the average value)
dd if=/dev/zero of=/ibm/gpfs/qos/test bs=1M count=1000 -
Limit throughput(Duration: 5 mins)
6.1 Set the maximum throughput of Class1 to 100Mbps
mmqos throttle update gpfs --pool system --class Class1 -C all_local --maxmbs 1006.2 Viewing speed limit information
mmqos throttle list gpfs6.3 Via dd command write 1000MB data and observe the speed limit (Note: Please try more for the command)
dd if=/dev/zero of=/ibm/gpfs/qos/test bs=1M count=1000
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Reserve Experiment Summary
Experiment Name:
Experiment Content:
Placement Policy Demonstration
Migration Policy Demonstration
QoS Current-Limiting Demonstration
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