Re: How to find out data alignment for LVM thin volume brick

[Strahil Nikolov <hunter86_bg@xxxxxxxxx>]

Have you checked this page: https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3.5/html/administration_guide/brick_configuration ?

The alignment depends on the HW raid stripe unit size.

Best Regards,

Strahil Nikolov 

On Tue, Jun 6, 2023 at 2:35, mabi

<mabi@xxxxxxxxxxxxx> wrote:

Hello,

I am preparing a brick as LVM thin volume for a test slave node using this documentation: 

https://docs.gluster.org/en/main/Administrator-Guide/formatting-and-mounting-bricks/

but I am confused regarding the right "--dataalignment" option to be used for pvcreate. The documentation mentions the following under point 1:

"Create a physical volume(PV) by using the pvcreate command. For example:

pvcreate --dataalignment 128K /dev/sdb

Here, /dev/sdb is a storage device. Use the correct dataalignment option based on your device.

    Note: The device name and the alignment value will vary based on the device you are using."

As test disk for this brick I have an external USB 500GB SSD disk from Samsung PSSD T7 (https://semiconductor.samsung.com/consumer-storage/portable-ssd/t7/) but my question is where do I find the information on which alignment value I need to use for this specific disk?

Best regards,

Mabi

________

Community Meeting Calendar:

Schedule -

Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC

Bridge: https://meet.google.com/cpu-eiue-hvk

Gluster-users mailing list

Gluster-users@xxxxxxxxxxx

https://lists.gluster.org/mailman/listinfo/gluster-users

________



Community Meeting Calendar:

Schedule -
Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC
Bridge: https://meet.google.com/cpu-eiue-hvk
Gluster-users mailing list
Gluster-users@xxxxxxxxxxx
https://lists.gluster.org/mailman/listinfo/gluster-users