topic ontap 9.5 - different Algorithms for Flash Cache and READS from SSD ? - did anyone notice a change in ONTAP Discussions

ontap 9.5 - different Algorithms for Flash Cache and READS from SSD ? - did anyone notice a change

xiawiz — Wed, 04 Jun 2025 12:33:52 GMT

OK I noticed a change in the way NABOX , Graphana , Harvest displays metrics related to Flash Cache and READS from SSD after CDOT upgrade from 9.4X to 9.5X - 3 different clusters / 3 diff upgrate dates / all display same characteristics - so is it just the way NABOX charts these metrics now or was the Algorithms for Flash Cache and READS from SSD modified in 9.5X ? thanks.

NASI

successful 9.4P5 3/2/2019 3/2/2019 nasi-04 9.4P3 9.4P5 00:19:39 01:59:17
successful 9.5P1 4/7/2019 4/7/2019 nasi-04 9.4P5 9.5P1 09:20:48 10:59:42

NANW

successful 9.4P5 2/23/2019 2/23/2019 nanw-04 9.4P3 9.4P5 04:03:40 05:46:12
successful 9.5P1 3/16/2019 3/16/2019 nanw-04 9.4P5 9.5P1 01:16:28 03:35:24

NAFH

successful 9.4P5 3/2/2019 3/2/2019 nafh-04 9.4P3 9.4P5 00:32:41 02:14:18
successful 9.5P1 4/14/2019 4/14/2019 nafh-04 9.4P5 9.5P1 19:43:05 21:31:46

Re: ontap 9.5 - different Algorithms for Flash Cache and READS from SSD ? - did anyone notice a chan

TMACMD — Thu, 09 May 2019 16:46:43 GMT

Did you happen to update the SDK to 9.5 for NABOX?

Re: ontap 9.5 - different Algorithms for Flash Cache and READS from SSD ? - did anyone notice a chan

xiawiz — Thu, 09 May 2019 16:56:44 GMT

Thanks TMAC - here are our versions on the NABOX side of the house

( BTW - we are using the NABOX ISO image )

Currently installed

NAbox 2.5 (2018-12-16).
NMSDK 9.4.
Harvest 1.4.

Re: ontap 9.5 - different Algorithms for Flash Cache and READS from SSD ? - did anyone notice a chan

TMACMD — Thu, 09 May 2019 16:58:30 GMT

yeah... update the SDK & the harvest versions. Both behind!

Up to you if you want to update the NABOX image itself!

Re: ontap 9.5 - different Algorithms for Flash Cache and READS from SSD ? - did anyone notice a chan

xiawiz — Thu, 09 May 2019 17:02:24 GMT

OK Will do, thanks, will report back later.....

Re: ontap 9.5 - different Algorithms for Flash Cache and READS from SSD ? - did anyone notice a chan

xiawiz — Thu, 09 May 2019 19:09:36 GMT

TMAC - thanks for your help, thru this tread I was able to update the SDK componenet and the Harvest Component - so that was a plus 😉 - as far as the graphs related to " Flash Cache and READS from SSD" - it looks like the "scale" changed after the upgrade I mentioned - also I remember for the last 4 or 5 ONTAP versions the oncommand system manager displayed "flash cache" info for the AFF controllers when it should not have( AFF systems do not have "Flash Cache" cards ). So when all is said and done after the ONTAP upgrade to 9.5X the oncommand system manager DOES NOT display "flash cache" info for the AFF controllers and that is now correctly reflected in the NABOX charts / graphs.

pic before and after ONTAP upgrade ( we see stats from all 4 nodes - 2 AFF and 2 HYBRID )

pic after ONTAP upgrade ( we see stats from 2 nodes - only the 2 HYBRID )