Rafael,
Changing the value of maxblocksize today does require the entire cluster to be stopped -- this is a current limitation in the product (which we are looking into eliminating).
Felipe
----
Felipe Knop [email protected]
GPFS Development and Security
IBM Systems
IBM Building 008
2455 South Rd, Poughkeepsie, NY 12601
(845) 433-9314 T/L 293-9314
Felipe Knop [email protected]
GPFS Development and Security
IBM Systems
IBM Building 008
2455 South Rd, Poughkeepsie, NY 12601
(845) 433-9314 T/L 293-9314
----- Original message -----
From: "Rafael Cezario" <[email protected]>
Sent by: [email protected]
To: "gpfsug main discussion list" <[email protected]>
Cc:
Subject: [EXTERNAL] [gpfsug-discuss] Online migration
Date: Wed, Nov 13, 2019 12:24 PM
Hello,
I have a Spectrum Scale cluster with 10 nodes on the version 4.2.
The cluster have maxblocksize=DEFAULT.
I will migrate all nodes to 5.0.3 (online) none downtime.
But the maxblocksize is fixed on the mmlsconfig after the migration (the man have this information)
maxblocksize 1M
man mmchconfig
Note: When you migrate a cluster from an earlier version to 5.0.0 or later, the value of maxblocksize stays the same. However, if maxblocksize was set to DEFAULT in the earlier version of the cluster, then migrating it to 5.0.0 or later sets it explicitly to 1 MiB, which was the default value in earlier versions. To change maxblocksize to the default value after migrating to 5.0.0 or later, set maxblocksize=DEFAULT (4 MiB).
How Can I perform non-stop migration and after migration create a new filesystem with blocksize = 4MiB?
My question is about finishing the migration and create a new filesystem with block size set to 4 MiB, its won't be possible until the maxblocksize changes.
In a environment where all migration will be done without stopping the cluster, my question was if there was any alternative
This behavior forces the entire cluster to stop.
Regards,
Rafael Cezário Damásio Cunha
IT Specialist - PowerVM/AIX/Spectrum Scale
Technology Support Services
Global Technology Services
Mobile:55-6198122-4435
E-mail:[email protected]
Brasilia, DF 70714-900
Brazil
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