Re: Exadata Cell Capacity and performance

I checked the X7-2 figures from here and it shows 179TB of raw flash storage.

https://www.oracle.com/technetwork/database/exadata/exadata-x7-2-ds-3908482.pdf

On Tue, Aug 17, 2021 at 1:29 PM Pap <oracle.developer35_at_gmail.com> wrote:

> Are these figures correct? Actually in our X8-2 half rack high capacity we
> get ~179TB of flash storage. And here you showed the same on X7-2, so i
> have not checked though but you may double check the data sheet to have the
> correct IOPS and storage stats to get a clear comparison.
>
> And I think if Disk IOPS is degrading from ~28K to ~18K, even if you have
> other small databases in existing X3 and you are moving only the critical
> DB to X8 , you should do a full fledged production workload replay on RAT
> to see the real impact. As because any Disk IO dependent workload may see
> degradation. Others may comment.
>
> On Tue, Aug 17, 2021 at 1:18 AM Lok P <loknath.73_at_gmail.com> wrote:
>
>> Hello All, We have one critical database(say DB1) moving from an X3-2 HC
>> full rack exadata machine to a new X7-2 HC half rack exadata machine. The
>> existing X3 full rack was hosting ~4 different other small databases along
>> with that critical database- DB1. The new X7 will be hosting only the DB1
>> database for the time being.
>>
>> So in this scenario as I see the data sheet and put the figures in as
>> below it seems the X7 half rack is better with respect to both flash and
>> disk storage capacity and flash IOPS. Just that the disk IOPS seems to be
>> lower in case of X7 half rack i.e. ~28K vs ~18K. So considering we are not
>> changing any application functionality of oracle software version etc, so
>> is it okay to assume we will be seeing improvement only , thus its safe to
>> directly go with the migration without any full fledged performance test?
>> Or there is any chances of performance degradation here and thus a full
>> fledged testing needed like real application testing?
>>
>>
>> IOPS For Half Rack
>> Flash Read IOPS Flash write IOPS Disk IOPS
>> X3-2 High Capacity (Full Rack) ~1.5million(~k per cell) ~1million(K per
>> cell) ~28K
>> X7-2 High Capacity (Half rack) ~2.3Million ~2.1million ~18K
>> Storage capacity For Half Rack
>> Raw disk Storage High Redundancy Normal redundancy Flash Storage
>> X3-2 High Capacity (Full Rack) ~504TB (TB/cell) ~TB(TB/cell) ~224TB(
>> TB/cell) ~22.4TB(~TB/Cell)
>> X7-2 High Capacity (Half rack) ~840TB (TB/cell) ~TB ~341TB ~179.2TB
>> (25.6TB/Cell)
>>
>

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