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This article mainly shows you "GPFS how to add and delete disks online", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "GPFS how to add and delete disks online" this article.

First, add the order online

1. View the current NSD disk

Dbfc:/tmp # mmlsnsd-m

Disk name NSD volume ID Device Node name Remarks

-

Gpfs1nsd 0AC8016258A2CCC4 / dev/sdc dbfc.example.com

Gpfs2nsd 0AC8016258A2CCF2 / dev/sdd dbfc.example.com

Gpfs3nsd 0AC8016258A2CD1B / dev/sde dbfc.example.com

Gpfs4nsd 0AC8016258A3AF5D / dev/sdf dbfc.example.com

Dbfc:/tmp # mmlsnsd

File system Disk name NSD servers

Db2arch gpfs4nsd (directly attached)

Db2data gpfs2nsd (directly attached)

Db2inst gpfs1nsd (directly attached)

Db2log gpfs3nsd (directly attached)

2. Edit the NSD configuration file

Vi / tmp/nsdprofile

Sdg:::dataAndMetadata::

3. Create an NSD disk

Dbfc:/tmp # mmcrnsd-F / tmp/nsdprofile

Mmcrnsd: Processing disk sdg

Mmcrnsd: Propagating the cluster configuration data to all

Affected nodes. This is an asynchronous process.

4. Confirm the creation

Dbfc:/tmp # mmlsnsd

File system Disk name NSD servers

Db2arch gpfs4nsd (directly attached)

Db2data gpfs2nsd (directly attached)

Db2inst gpfs1nsd (directly attached)

Db2log gpfs3nsd (directly attached)

(free disk) gpfs5nsd (directly attached)

Dbfc:/tmp # mmlsnsd-m

Disk name NSD volume ID Device Node name Remarks

-

Gpfs1nsd 0AC8016258A2CCC4 / dev/sdc dbfc.example.com

Gpfs2nsd 0AC8016258A2CCF2 / dev/sdd dbfc.example.com

Gpfs3nsd 0AC8016258A2CD1B / dev/sde dbfc.example.com

Gpfs4nsd 0AC8016258A3AF5D / dev/sdf dbfc.example.com

Dbfc:/tmp # mmlsdisk db2data

Disk driver sector failure holds holds storage

Name type size group metadata data status availability pool

Gpfs2nsd nsd 512-1 yes yes ready up system

Gpfs5nsd nsd 512-1 yes yes ready up system

5. Add the newly created NSD disk to the GPFS cluster

Dbfc:/tmp # cat / tmp/nsdprofile

# sdg:::dataAndMetadata::

Gpfs5nsd:::dataAndMetadata:-1::system

Dbfc:/tmp # mmadddisk db2data-F / tmp/nsdprofile

The following disks of db2data will be formatted on node dbfc:

Gpfs5nsd: size 10240 MB

Extending Allocation Map

Checking Allocation Map for storage pool system

Completed adding disks to file system db2data.

Mmadddisk: Propagating the cluster configuration data to all

Affected nodes. This is an asynchronous process.

6. Confirm the result of capacity expansion

Asynchronous synchronization, so you need to log in to all nodes to check

Df-h

Dbnode02:~ # mmlsnsd

File system Disk name NSD servers

Db2arch gpfs4nsd (directly attached)

Db2data gpfs2nsd (directly attached)

Db2data gpfs5nsd (directly attached)

Db2inst gpfs1nsd (directly attached)

Db2log gpfs3nsd (directly attached)

II. Rebalance file system

Dbfc:/tmp # mmrestripefs db2data-b

Scanning file system metadata, phase 1...

Scan completed successfully.

Scanning file system metadata, phase 2...

Scan completed successfully.

Scanning file system metadata, phase 3...

Scan completed successfully.

Scanning file system metadata, phase 4...

Scan completed successfully.

Scanning user file metadata...

100.00 complete on Thu Apr 13 16:44:28 2017 (133376 inodes with total 1969 MB data processed)

Scan completed successfully.

III. Dynamic reduction

Dbfc:/tmp # mmrestripefs db2data-b

Scanning file system metadata, phase 1...

Scan completed successfully.

Scanning file system metadata, phase 2...

Scan completed successfully.

Scanning file system metadata, phase 3...

Scan completed successfully.

Scanning file system metadata, phase 4...

Scan completed successfully.

Scanning user file metadata...

100.00 complete on Thu Apr 13 16:44:28 2017 (133376 inodes with total 1969 MB data processed)

Scan completed successfully.

Dbfc:/tmp # mmlsnsd

File system Disk name NSD servers

Db2arch gpfs4nsd (directly attached)

Db2data gpfs2nsd (directly attached)

Db2data gpfs5nsd (directly attached)

Db2inst gpfs1nsd (directly attached)

Db2log gpfs3nsd (directly attached)

Dbfc:/tmp # mmdeldisk db2data gpfs2nsd

Deleting disks...

Scanning file system metadata, phase 1...

73% complete on Thu Apr 13 16:51:18 2017

100% complete on Thu Apr 13 16:51:19 2017

Scan completed successfully.

Scanning file system metadata, phase 2...

Scan completed successfully.

Scanning file system metadata, phase 3...

Scan completed successfully.

Scanning file system metadata, phase 4...

Scan completed successfully.

Scanning user file metadata...

100.00 complete on Thu Apr 13 16:51:28 2017 (133376 inodes with total 1969 MB data processed)

Scan completed successfully.

Checking Allocation Map for storage pool system

Attention: A disk being removed reduces the number of failure groups to 1

Which is below the number required for replication: 2.

New blocks will be allocated from the remaining disks

But files will be unreplicated and hence at risk.

Tsdeldisk completed.

Mmdeldisk: Propagating the cluster configuration data to all

Affected nodes. This is an asynchronous process.

The above is all the contents of the article "how to add and remove disks online by GPFS". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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