Re: oracle v SS

I have to jump in on this one, as there are a few things that need to be discussed further:

-Always on Availability Groups, (AG) vs. RAC: Due to OS level clustering well known in the Windows world, the AG product isn't a clear apples and apples comparison. They didn't find it productive for any writes to go back from the replicas to the primary, so AG is more like Data Guard than RAC. For the data migrations I do to Azure of Oracle databases, I will undoubtedly talk them out of RAC, as there's better solutions and Data Guard rocks in the cloud on VMs with Far Sync, even for those customers that may correctly be looking at RAC for scalability.

• Another suspicious default in SQL Server is "clustered index" (as opposed to heap table) as a data storage structure, which is similar to index organized table (IOT) in Oracle, just the IOTs performs much better because of the smarter implementation. SQL Server architecture is different. Clustered indexes perform very efficiently vs. an IOT in Oracle, which has a very unique use case, but there is also less need for memory in the TempDB for sorting due to this design, (no PGA, either). Keep in mind, it's again not an apple to apple comparison when you only take the index structure into consideration.
• Oracle/Linux troubleshooting/performance tuning features are superior! SQL Server is slowly catching up, but it's still way beyond Oracle. SQL Server is on Linux, which offers similar optimization tool availability.
• SQL Server comes with BI components (Reporting & Analysis Server, SSIS). Most newer, advanced, more efficient products are not in SQL Server, but Azure DB and Azure in general. Power BI, Analysis Server, Hyperscale, Azure Data Factory). It may be less popular in the Oracle world, but I'm at one of the largest Microsoft conferences today and I can tell you, most of us have moved to the cloud and cloud products. SQL Server outside of Azure is when we have no other choice. There's so much more available in Azure.

Thanks, hope this helps!

*Kellyn Pot'Vin-Gorman*
DBAKevlar Blog <http://dbakevlar.com>
President Denver SQL Server User Group <http://denversql.org/> about.me/dbakevlar

On Thu, Nov 7, 2019 at 1:41 PM Noveljic Nenad <nenad.noveljic_at_vontobel.com> wrote:

> Hi Orlando,
>
> Both products are high-end - you can't go wrong with either of them. When
> making the decision I'd consider not only the cost, but also what know-how
> you already have in-house, not only about databases, but OS (including
> virtualization) as well. In fact, that might be the most important criteria.
>
> Here are some technical points, which might relevant:
>
> - Readers-blocking-writers mentioned by Mladen is just an awkward default
> that can be changed.
>
> - Another suspicious default in SQL Server is "clustered index" (as
> opposed to heap table) as a data storage structure, which is similar to
> index organized table (IOT) in Oracle, just the IOTs performs much better
> because of the smarter implementation.
>
> - PL/SQL is much more sophisticated than TSQL, which might be relevant if
> you plan to store your application logic in the database. Actually, TSQL
> doesn't scale well when the same code is concurrently executed by multiple
> sessions.
>
> - There are also some other scalability issues related to built-in SQL
> Server OS Scheduler.
>
> - SQL Server integration with Active Directory is seamless. In contrast,
> Oracle integration is pain in the neck. Consequently, the user
> administration is much easier in SQL Server, which might be relevant if you
> let lot of people directly connect to the database.
>
> - Oracle/Linux troubleshooting/performance tuning features are superior!
> SQL Server is slowly catching up, but it's still way beyond Oracle.
>
> - I discovered a couple of cases where SQL Server optimizer works better.
> However, it's nothing that couldn't be achieved by rewriting the queries.
>
> - SQL Server comes with BI components (Reporting & Analysis Server, SSIS).
>
> I elaborated on many points above here:
> https://nenadnoveljic.com/blog/category/comparison-oracle-sql-server/
>
> Good luck!
>
> Nenad
>
> Twitter handle: _at_NenadNoveljic
>
>
> -----Original Message-----
> From: oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> On
> Behalf Of Mladen Gogala
> Sent: Donnerstag, 7. November 2019 21:43
> To: oracle-l_at_freelists.org
> Subject: Re: oracle v SS
>
> On 11/7/19 3:13 PM, Orlando L wrote:
>
> > Hi all
> >
> > Trying to decide between oracle and sql server for a query/warehousing
> > type database. Can anyone share their input or point to a paper for
> > the current versions. Thanks
> >
> > Orlando.
>
> Hi Orlando!
>
> SQL Server enterprise edition comes with what Oracle calls "In-Memory
> option" and partitioning, no further licensing required. SQL Server doesn't
> have multi-versioning which makes things simpler for mostly query
> database. On the flip side, readers block writers and vice versa, which
> means that loading usually means downtime. SS has something called "always
> on availability groups", which allows you to maintain shared nothing
> "cluster" with several identical database copies, which can be queried in
> parallel. SQL Server supports bitmap indexes and star
> (snowflake) schema queries. SQL Server EE is significantly cheaper than
> Oracle. I would advise going with SQL Server.
>
> Regards
>
>
> --
> Mladen Gogala
> Database Consultant
> Tel: (347) 321-1217
>
> --
> http://www.freelists.org/webpage/oracle-l
>
>
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