Solved

a question about the nutanix node single disk space

  • 13 July 2017
  • 4 replies
  • 3601 views

Badge +6
Hi

I have a liitle question about the Nutanix Node disk space capacity.
There are many descriptions on the nutanix bible about the disk capacity. but in a newly installed enviroment, there are 3 nodes and every node have 2*480GB SSD and 6*1TB SATA HDD, according to the bible, in every HDD, there are some space reserved for curator, but I found that some of HDD have 842GB free space and some have 802GB free space, my question is why 6 same 1TB HDD disks have different free space in the node? and what is the 40GB disk used for?

thanks
icon

Best answer by john_burton 17 July 2017, 19:08

Hello -

Curator typically reserves 20 GB or 2% of each HDD's capacity, whichever is greater.

One HDD in each node is designated as the "primary" curator disk and will have a total reservation of 60 GB if the 2% figure falls below that amount. For example, on a host with 6 TB disks:


|Disk ID|Prepared|Online|Curator Usage / Quota|Last Curator Usage Check|Disk Usage|Last Disk Usage Check|Explicit Reservation| |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+----------------------------| | 58* | Yes | Yes | 4.54 MB / 109.78 GB | Jul 17 11:45:00 | 1.88 TB | Jul 17 11:45:00 | N/A | |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+----------------------------| | 59 | Yes | Yes | 4.00 KB / 109.78 GB | Jul 17 11:45:00 | 1.88 TB | Jul 17 11:45:00 | N/A | |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+----------------------------|
In a system like yours with 1 TB disks:
|Disk ID|Prepared|Online|Curator Usage / Quota|Last Curator Usage Check|Disk Usage|Last Disk Usage Check|Explicit Reservation| |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+--------------------| | 310* | Yes | Yes | 1.18 MB / 60.00 GB | Jul 17 10:02:39 |378.08 GB | Jul 17 10:02:39 | N/A | |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+--------------------| | 308 | Yes | Yes | 0.00 KB / 20.00 GB | Jul 17 10:02:39 |399.11 GB | Jul 17 10:02:39 | N/A | |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+--------------------|
Hope this clears it up.
View original

4 replies

Userlevel 1
Badge +5
Hello -

Curator typically reserves 20 GB or 2% of each HDD's capacity, whichever is greater.

One HDD in each node is designated as the "primary" curator disk and will have a total reservation of 60 GB if the 2% figure falls below that amount. For example, on a host with 6 TB disks:


|Disk ID|Prepared|Online|Curator Usage / Quota|Last Curator Usage Check|Disk Usage|Last Disk Usage Check|Explicit Reservation| |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+----------------------------| | 58* | Yes | Yes | 4.54 MB / 109.78 GB | Jul 17 11:45:00 | 1.88 TB | Jul 17 11:45:00 | N/A | |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+----------------------------| | 59 | Yes | Yes | 4.00 KB / 109.78 GB | Jul 17 11:45:00 | 1.88 TB | Jul 17 11:45:00 | N/A | |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+----------------------------|
In a system like yours with 1 TB disks:
|Disk ID|Prepared|Online|Curator Usage / Quota|Last Curator Usage Check|Disk Usage|Last Disk Usage Check|Explicit Reservation| |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+--------------------| | 310* | Yes | Yes | 1.18 MB / 60.00 GB | Jul 17 10:02:39 |378.08 GB | Jul 17 10:02:39 | N/A | |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+--------------------| | 308 | Yes | Yes | 0.00 KB / 20.00 GB | Jul 17 10:02:39 |399.11 GB | Jul 17 10:02:39 | N/A | |----------+------------+---------+-------------------------------+--------------------------------------+---------------+---------------------------------+--------------------|
Hope this clears it up.
Badge +6
Hi John:

It is very clear for this question and many thanks for your answer.

BTW, how to check the disk space usage as your example?


Regards
Userlevel 1
Badge +5
This data is available on the Curator diagnostic pages on the CVM. To access this, you'll need to SSH to a CVM and execute the command:

  • links http:0:2010

You can find more details about the diagnostic page at https://portal.nutanix.com/#/page/docs/details?targetId=NSS_troubleshooting-NOS_v4_1:arc_curator_diagnostics_page_c.html

The document is a little old, but still relevent.
Badge +6
Thanks John

I am very appreciate for your help.


Regards

Reply