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

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Dear Strahil,

Thank you very much for pointing me to the RedHat documentation. I wasn't aware of it and it is much more detailed. I will have to read it carefully.

Now as I have a single disk (no RAID) based on that documentation I understand that I should use a data alignment value of 256kB.

Best regards,
Mabi

------- Original Message -------
On Wednesday, June 7th, 2023 at 6:56 AM, Strahil Nikolov <hunter86_bg@xxxxxxxxx> wrote:

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: 


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
Gluster-users mailing list

________



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

[Index of Archives]     [Gluster Development]     [Linux Filesytems Development]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux