[gpfsug-discuss] add local nsd back to cluster?

[Olaf Weiser]

Hi -
assuming, you'll run it  withou ECE  ?!? ... just with replication on the file system level
ba aware, every time a node goes offline, you 'll have to restart the disks in your filesystem .. This causes a complete scan of the meta data to detect files with missing updates / replication


apart from that to your Q :
you may consider to backup mmsdr
additionally, take a look to   mmsdrrestore, in case you want to restore a nodes's SDR configuration

quick and dirty..  save the content  of  /var/mmfs  may also help you

during the node is "gone".. of course.. the disk is down , after restore of SDR / node's config .. it should be able to start ..
the rest runs as usual



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Von: gpfsug-discuss <gpfsug-discuss-bounces at gpfsug.org> im Auftrag von shao feng <shaof777 at gmail.com>
Gesendet: Donnerstag, 28. Juli 2022 09:02
An: gpfsug main discussion list <gpfsug-discuss at gpfsug.org>
Betreff: [EXTERNAL] [gpfsug-discuss] add local nsd back to cluster?

Hi all, I am planning to implement  a cluster with a bunch of old x86 machines, the disks are not connected to nodes via the SAN network, instead each x86 machine has some local attached disks. The question is regarding node failure, for example
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Hi all,

I am planning to implement  a cluster with a bunch of old x86 machines, the disks are not connected to nodes via the SAN network, instead each x86 machine has some local attached disks.
The question is regarding node failure, for example only the operating system disk fails and the nsd disks are good. In that case I plan to replace the failing OS disk with a new one and install the OS on it and re-attach these nsd disks to that node, my question is: will this work? how can I add a nsd back to the cluster without restoring data from other replicas since the data/metadata is actually not corrupted on nsd.

Best regards,
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