Intriguing, right? The Oracle team at Dell Technologies recently configured a Dell EMC PowerEdge server equipped with the new AMD EPYC processors to test the performance of an Oracle 19c database feature called Force Full Cache (FFC) mode.  When using FFC mode, the Oracle server attempts to cache the full database footprint in buffer cache memory. This effectively reduces the read latency from what would have been experienced with the storage system to memory access speed. Writes are still sent to storage to ensure durability and recovery of the database. What’s fascinating is that by using Oracle’s FFC mode, the AMD EPYC processors can accelerate database operations while bypassing most storage I/O wait times.

For this performance test our PowerEdge R7525 server was populated with two AMD EPYC 7543 processors with a speed of 2.8 GHz, each with 32 cores. There are several layers of cache in these processors:

• Zen3 processor core, includes an L1 write-back cache
• Each core has a private 512 KB L2 cache
• Up to eight Zen3 cores share a 32 MB L3 cache

Each processor also supports 8 memory channels and each memory channel supports up to 2 DIMMS. With all these cache levels and memory channels our hypothesis was that the AMD EPYC processors were going to deliver amazing performance. Although we listed the processor features we believe will most impact performance, in truth there is much more to these new processors that we haven’t covered. The AMD webpage on modern data workloads is an excellent overview.  For a deep dive into RDBMS tuning, this white paper provides more great technical detail.

For the sake of comparison, we also ran an Oracle database without FFC mode on the same server. Both database modes used the exact same technology stacks:

• Oracle Enterprise Edition 19c (19.7.0.0.200414)
• Red Hat Enterprise Linux 8.2
• VMware vSphere ESXi 7.0 Update 1

We virtualized the Oracle database instance since that is the most common deployment model in use today.   AMD and VMware are continuously working to optimize the performance of high value workloads like Oracle. In the paper, “Performance Optimizations in VMware vSphere 7.0 U2 CPU Scheduler for AMD EPYC Processors” VMware shows how their CPU scheduler achieves up to 50% better performance than vSphere 7.0 U1. As the performance gap narrows between bare metal and virtualized applications, the gains in agility with virtualization outweigh the minor performance overhead of a hypervisor. The engineering team performing the testing used VMware vSphere virtualization to configure a primary Oracle virtual machine that was cloned to a common starting configuration.

HammerDB is a leading benchmarking tool used with databases like Oracle, Microsoft SQL Server and others. The engineering team used HammerDB to generate a TPROC-C workload on the database VM. The TPROC-C benchmark is referred to as an Online Transaction Processing (OLTP) workload because it simulates terminal operators executing transactions. When running the TPROC-C workload the storage system must support thousands of small read and write request per minute. With a traditional configuration, Oracle’s buffer cache would only be able to accelerate a portion of the reads and writes. The average latency of the system will increase when more reads and writes go to storage system as the wait times are greater for physical storage operations than memory. This is what the team expects to observe with the Oracle database that is not configured for FFC mode. Storage I/O is continually getting faster but not nearly as fast as I/O served from memory.

Once the test tool warms the cache, most of the reads will be serviced from memory rather than from storage, providing what we hope will be a significant boost in performance. We will not be able to separate out the individual performance benefits of using AMD EPYC processors combined with Oracle’s FFC mode, however, the efficiencies gained via AMD caches, memory channels, and a VMware vSphere optimizations will make this performance test fun!

Before reviewing the performance results, it is important that we review the virtual machine, storage, and TPROC-C workload configurations. One important difference between the baseline virtual machine (no FFC mode) and the database configuration with FFC mode enabled is the memory allocated to the SGA. A key consideration is that the logical database size is smaller than the individual buffer cache. See the Oracle 19c Database Performance Tuning Guide for a complete list of considerations. In this case the SGA size is 784 GB to accommodate caching the entire database in the Oracle buffer cache. All other configuration parameters like vCPU, memory, and disk storage were identically configured.

Using memory technologies like Force Full Cache mode should be a key consideration for the Enterprise as the AMD EPYC processors enable the PowerEdge R7525 servers to support up to 4 TB of LRDIMM. Depending upon the database and its growth rate, this could support many small to medium- sized systems. The advantage for the business is the capability to accelerate the database by configuring a Dell EMC PowerEdge R7525 server and AMD processors with enough memory to cache the entire database.

Table 1:  Virtual Machine configuration and SGA size

This database storage configuration includes using VMware vSphere’s Virtual Machine File System (VMFS) and Oracle’s Automatic Storage Management (ASM) on Direct Attached Storage (DAS). The storage configuration is detailed in the table below. ASM Normal redundancy mirrors each extent providing the capability to protect against one disk failure.

Table 2:  Storage and ASM configuration

We used HammerDB to create a TPROC-C database with 5,000 simulated warehouses which generated approximately 500 GB of data, whichwas small enough to be loaded entirely in the buffer cache. Other HammerDB settings we used included those shown in this table:

Table 3:  HammerDB: TPROC-C test configuration

New Orders Per Minute (NOPM) is a metric that indicates the number of orders that were fully processed in one minute. This performance metric provides insight into the performance of the database system and can be used to compare two different systems running the same TPROC-C workload. The AMD EYPC processors combined with FFC mode delivered an outstanding 244% more NOPM than the baseline system. This is a powerful finding because it shows how tuning the hardware and software stack can accelerate database performance without adding more resources. In this case the optimal technology stack included AMD EYPC processors which, when combined with Oracle’s FFC mode, accelerated NOPM by 2.4 times the baseline.

Figure 1:  New Orders Per Minute Comparison 

What factors played a role in boosting performance? The Average Storage Response Time chart for the baseline test shows that the system’s average storage response time was .24 milliseconds. The goal of OLTP production systems is that most storage response times should be less than 1 millisecond as this is an indication of healthy storage performance. Thus, the baseline system was demonstrating good performance; however, even with the minimal storage response times the system only achieved 169,481 NOPM.

With FFC mode enabled, the entire database resided in the database buffer cache. This resulted in fewer physical reads and faster average storage response times. Results show the average storage response time with FFC was less than half the baseline numbers at just .11 milliseconds, or 2.2 times faster than the baseline.  With most of the I/O activity working in memory the AMD EYPC processor cache and memory channel features provided a big boost in accelerating the database workload!

Figure 2:  Average Storage Response Time 

The combination of AMD EYPC processors with Oracle’s Force Full Cache mode should provide extremely good performance for databases that are smaller than 4 TBs. Our test results show an increase in 244% in New Orders per Minute and faster response time, meaning that this solution stack built on the PowerEdge R7525 can accelerate an Oracle database that fits the requirements of FFC mode. Every database system is different, and results will vary. But in our tests this AMD-based solution provided substantial performance.

Supporting detail:

Table 4:  PowerEdge R7525 Configuration

The Opportunity

Containers are a lightweight, stand-alone, executable package of software that includes everything that is needed to run an application: code, runtime, system tools, system libraries, and settings. A container isolates software from its environment and ensures that it works uniformly despite any differences between development and staging. Containers share the machine’s operating system kernel and do not require an operating system for each application, driving higher server efficiencies and reducing server and licensing costs.

The traditional build process for database application development is complex, time intensive and difficult to schedule. With containers and the right supporting tools, the traditional build process is transformed into a self-service, on-demand experience that enables developers to rapidly deploy applications. In the remaining sections of this article we describe how to develop the capability to have an Oracle database container running in a matter of minutes.

Oracle has a long commitment to supporting the developer communities working in containerized environments.  At the DockerCon US event in April 2017, Oracle announced that its Oracle 12c database software application would be available alongside of other Oracle products on Docker Store, the standard for dev-ops developers. Dev-ops developers have pulled over four billion images from the Docker Store and are increasingly turning to the Docker Store as the canonical source for high-quality curated content.  In the present-day database world, customers are invariably switching to the use of containers with Kubernetes management to build and run a wide variety of applications and services in a highly available on-premises hosted environment.

Containerized environments can reliably offer high-performance compute, storage and network capabilities with the necessary configurations.  A containerized environment also reduces overhead costs by providing a repeatable process for application deployment across build, test, and production systems. To enable the deployment and management of containerized applications, organizations use Kubernetes technologies to operate at any scale including production. Kubernetes enables powerful collaboration and workflow management capabilities by deploying containers for cloud-native, distributed applications and microservices.  It even allows you to repackage legacy applications for increased portability, more efficient deployment, and improved customer and employee engagement.

Figure 1: Docker containers for reducing development complexity 

The Solution

For many companies, to boost productivity and time to value, container usage starts with the departments that are focused on software development. Their journey typically starts with installing, implementing, and using containers for applications that are based on the microservice architecture as shown in Figure 2.  Developers want to be able to build microservices-based container applications without changing code or infrastructure.  

This approach enables portability between data centers and obviates the need for changes in traditional applications enabling faster development and deployment cycles. Oracle Docker containers run the microservices while Kubernetes is used for container orchestration. Also, the microservices running within Docker containers can communicate with the Oracle databases by using messaging services.

Figure 2: Architecture for Oracle Database featuring Docker and Kubernetes 

Using orchestration and automation for containerized applications, developers can self-provision an Oracle database, thereby increasing flexibility and productivity while saving substantial time in creating a production copy for development and testing environments.  This solution enables development teams to quickly provision isolated applications without the traditional complexities. 

Our Dell EMC engineers recently tested and validated  a solution for Oracle database using Docker containers and Kubernetes. The solution uses Oracle Database in containers, Kubernetes, and the Container Storage Interface (CSI) Driver for Dell EMC PowerFlex OS to show how dev/ops teams can transform their development processes.

Dell EMC engineers demonstrated two use cases for this solution.  Both of our use cases feature four Dell EMC PowerEdge R640 servers, which are an integral part of Dell EMC VxFlex Ready Nodes, and a CSI Driver for Dell EMC PowerFlex that were hosted in our DellEMC labs.

Use Case 1

In use case 1, the DellEMC engineers manually provisioned the container-based development and testing environment shown in Figure 3 as follows:

1. Install Docker.
2. Activate the Docker Enterprise Edition-License.
3. Run the Oracle 12c database within the Docker container.
4. Build and run the Oracle 19c database in the Docker container.
5. Import the sample Oracle schemas that are pulled from GitHub into the Oracle 12c and 19c database.
6. Install Oracle SQL Developer and query tables from the container to demonstrate that the connection from Oracle SQL Developer to Oracle database functions.
   
   

Figure 3: Use Case 1 - Architecture 

The key benefit of our first use case was the time that we saved by using Docker containers instead of the traditional manual installation and configuration method of building a typical Oracle database environment. Use Case 1 planning also demonstrated the importance of selecting the Docker registry location and storage provisioning options that are most appropriate for the requirements of a typical development and testing environment.

Use Case 2

Use Case 2 demonstrates the value of CSI plug-in integration with Kubernetes and Dell EMC Power Flex storage to automate storage configuration. Kubernetes orchestration with PowerFlex provides a container deployment strategy with persistent storage. It demonstrates the ease, simplicity, and speed in scaling out a development and testing environment from production Oracle databases. In this use case, a developer provisions the Oracle database in containers on the same infrastructure described in Use Case 1 only this time using Kubernetes with the CSI Driver for Dell EMC PowerFlex. Figure 4 depicts the detailed architecture of Use Case 2.

Figure 4. Use Case 2 – Architecture 

Use Case 2 demonstrates how Docker, Kubernetes, and the CSI Driver for Dell EMC PowerFlex accelerate the development life cycle for Oracle applications. Kubernetes configured with the CSI Driver for Dell EMC VxFlex OS simplified and automated the provisioning and removal of containers with persistent storage.  Engineers used yaml configuration files along with the kubectl command to quickly deploy and delete containers and complete pods. Our solution demonstrates that developers can provision Oracle databases in containers without the complexities that are associated with installing the database and provisioning storage.

Use Case Observations and Benefits

Adding Kubernetes container orchestration is an essential addition for database developers on a containerized development journey. Automation becomes essential with the expansion of containerized application deployments. In this case, it enabled our developers to bypass the complexities that are associated with plain scripting.  Instead, our solution uses open source Kubernetes to accomplish the developer’s objectives. The CSI plug-in integrates with Kubernetes and exposes the capabilities of the Dell EMC PowerFlex storage system, enabling the developer to:

• Take a snapshot of the Oracle database, including the sample schema that was pulled from the GitHub site.
• Protect the work of the existing Oracle database, which was changed before taking the snapshot. We can protect any state. Use the CSI plug-in Driver for Dell EMC PowerFlex OS to create a snapshot that is installed in Kubernetes to provide persistent storage.
• Restore an Oracle 19c database to its pre-deletion state using a snapshot, even after removing the containers and the attached storage.

In our second use case, using Kubernetes combined with the CSI Driver for DellEMC PowerFlex OS simplified and automated the provisioning and removal of containers and storage. In this use case, we used yaml files along with the kubectl command to deploy and delete the containers and pods. All these components facilitate the automation of the container hosting the Oracle database on the top of PowerFlex.

Kubernetes, enhanced with the CSI Driver for Dell EMC VxFlex OS, provides the capability to attach and manage Dell EMC VxFlex OS storage system volumes to containerized applications. Our developers worked with a familiar Kubernetes interface to modify a copy of Oracle database schema gathered from the Github repository database and connect it to the Oracle database container. After modifying the database, the developer protected all progress by using the snapshot feature of Dell EMC VxFlex OS storage system and creating a point-in-time copy of the database.

Comparing Use Case 1 to Use Case 2 demonstrated how we can easily shift away from the complexities of scripting and using the command line to implement a self-service model that accelerates container management. The move to a self-service model, which increases developer productivity by removing bottlenecks, becomes increasingly important as the Docker container environment grows.

Summary

The power of containers and automation show how tasks that traditionally required multiple roles—developers and others working with the storage and database administrators - can be simplified. Kubernetes with the CSI plug-in enables developers and others to do more in less time and with fewer complexities. The time savings means that coding projects can be completed faster, benefiting both the developers and the business-side employees and customers. Overall, the key benefit shown in comparing our two use cases was the transformation from a manually managed container environment to an orchestrated system with more capabilities.

Innovation drives transformation. In the case of Docker containers and Kubernetes, the key benefit is a shift to rapid application deployment services. Oracle and many others have embraced containers and provide images of applications, such as for the Oracle 12c database, that can be deployed in days and instantiated in seconds. Installations and other repetitive tasks are replaced with packaged applications that enable the developer to work quickly in the database. The ease of using Docker and Kubernetes, combined with rapid provisioning of persistent storage, transforms development by removing wait time and enabling the developer to move closer to the speed of thought.

The addition of the Kubernetes orchestration system and the CSI Driver for Dell EMC VxFlex OS brings a rich user interface that simplifies provisioning containers and persistent storage. In our testing, we found that Kubernetes plus the CSI Driver for Dell EMC VxFlex OS enabled developers to provision containerized applications with persistent storage. This solution features point-and-click simplicity and frees valuable time so that the storage administrator can focus on business-critical tasks.

The best of all worlds: Dell EMC Ready Bundle for Oracle (Part I) 

The time has finally arrived! The Dell EMC Ready Bundle for Oracle which is an integrated, validated, tested and engineered system has been launched. This solution will help the Oracle DBAs and other IT users address and eliminate most of the below expectations and challenges in a typical Oracle database infrastructure.

• Higher performance which should be consistent and scalable with the exponential data deluge.
• Higher availability and reliability for mission critical applications.
• Optimal time and operational process management related to database infrastructure.
• Optimal control of database CAPEX, licensing and resource cost with enhanced productivity.
• Improved interoperability among multiple vendors for support of database and other related activities.

It is indeed incredible that the Dell EMC Ready Bundle for Oracle addresses all the above concerns/challenges and provides a better solution vis-à-vis its competitors. When we talk of vetted claims (verified by internal and external sources of Dell EMC) regarding its features, the following points are worth mentioning:-

• 20% lesser Oracle licensing cost.
• 5X Space savings for copies of Oracle databases.
• 99K+ IOPS with sub-millisecond(0.75 milliseconds) latencies
• Six Nine’s availability for Oracle databases.

Now let’s look into the individual components that deliver the above exceptional features/statistics. All the components of the Dell EMC Ready Bundle for Oracle  come from the best of all worlds like Dell EMC VMAX 250F (storage), Dell EMC PowerEdge 14G servers (compute), VMware vSphere (Virtualization), Oracle 12cRel2 database (database), Dell EMC AppSync (Applications) etc. as depicted in figure 1 :-

Figure 1: Components of the Dell EMC Ready Bundle for Oracle

This stack of Dell EMC software and hardware along with Oracle Database and Red Hat Enterprise Linux offers umpteen benefits individually or as the Dell EMC Ready Bundle for Oracle. The Dell EMC Ready Bundle for Oracle facilitates the management, optimization, and reduction of OPEX & CAPEX costs to help with the ever-increasing pressure on organizational budget. This bundle offers high resiliency, availability, productivity, performance and innovation. For all technical and non-technical issues, there is a single support window manned by experienced and reputed Dell EMC personnel. Now let’s try to understand all the components of The Dell EMC Ready Bundle for Oracle.

Dell EMC VMAX 250F All Flash Array is the storage component which is designed to consolidate multiple mixed workload Oracle databases into a single platform with a very high IOPS and sub-millisecond response time. Dell EMC Connectrix Switches and directors provide six 9s high availability, built-in high availability, maximum scalability and unmatched reliability with high performance. The Dell EMC PowerEdge R940 is designed to power the Oracle mission-critical applications and real-time decisions, consolidate hardware resources and/or save Oracle licensing costs. Oracle databases are increasingly running(over 70% of the customer base) on the VMware vSphere platform . So far as Oracle Database is concerned, VMware delivers an industry-leading intelligent virtual infrastructure that maximizes performance, scalability and availability while enabling fully automated disaster recovery, better-than-physical security, and proactive management of service levels. Red Hat Linux 7.3 helps in optimizing Oracle Database environments to keep up with the ever increasing workload demands and evolving security risks. Dell EMC AppSync simplifies, orchestrates and automates the process of generating and consuming application consistent copies of production data. It provides intuitive workflows to setup scheduled protection and repurposing jobs that provide end to end automation of all the steps from application discovery and storage mapping to mounting of the copies to the target hosts.

All the benefits that are described above are available in the Dell EMC Ready Bundle for Oracle.

Variants of the Dell EMC Ready Bundle for Oracle

With the above components in place, we have two variants available at present. They are small and medium configurations as depicted in Figures 2 & 3. The “large configuration” variant will be discussed in my next blog..

Figure 2: Small Configuration

Figure 3: Medium Configuration

Both small and medium configurations ensure higher performance, scalability, resilience and availability. With these configurations, Dell EMC has conducted some in-house testing and found some interesting/extraordinary results. Let me discuss these results.

Dell EMC has run five tests for five different use cases as documented below:-

1. Two production Oracle RAC clusters
2. Repurposing five production databases to fifteen dev RAC database clusters.
3. Cluster of five OLAP production databases
4. Mixed OLTP workloads
5. Mixed OLAP and OLTP workloads

The detailed configuration and the outcomes of the various tests are documented here.  In this blog I want to touch upon the last test (use case five) that was run based on the below configuration.

Figure 4: Configuration and Pictorial Diagram of Use Case Five Test

The outcome of this test is phenomenal which is depicted in figure 5.

Figure 5: Outcome of Use Case Five Test

Summary

The Dell EMC Ready Bundle for Oracle is an awesome solution with great features like scalability, performance, consolidation, automation, centralized management and protection.  So far as technical virtues of this solution is concerned, it has been internally tested which delivers fantastic results in terms of higher IOPS, bandwidth, scalability, consolidation along with consistent sub-millisecond (less than .75 milliseconds) latencies even after adding enhanced OLTP and OLAP workloads. All these salient features of the Dell EMC Ready Bundle for Oracle in turn reduce the CAPEX and OPEX costs. More importantly, you feel less worried as the Dell EMC Ready Bundle for Oracle makes lifecycle management simpler and all the support and services requests are taken care of by Dell EMC staff with over 10 years of experience.  Additionally, the Dell EMC R740/R940 Servers can sustain multiple and larger workloads with less CPU and memory utilization. When we talk of Dell EMC VMAX 250F storage we observed that it generates 99K+ IOPS (in-house) along with higher throughput and less than .75 millisecond latencies for mixed workloads. Repurposing copies generated by the Dell EMC AppSync software helps in 5X flash storage space savings due to the inline deduplication and compression features of VMAX 250F All flash arrays. AppSync also helps in automation of the cloned production database copies and protection of the databases.  Net-net, the Dell EMC Ready Bundle for Oracle is a winning solution in all aspects as it combines the best of all the worlds of a typical datacenter.

N.B : The large configuration of Dell EMC Ready Bundle for Oracle has been discussed in my next blog.

In the Part III of this blog series, I would like to discuss about a new Oracle solution on XtremIO X2 Array.

The best of all worlds: Dell EMC Ready Bundle for Oracle (Part II)

In my last blog I talked about the small and medium configurations. In this blog, I am going to talk about the large configuration of Ready Bundle for Oracle (RBO) .Part III of this blog series will talk about the different backup options available in this product. To back up the small configuration of RBO (called commercial backups), we use Data Domain 6300 while Data Domain 9300 (DD9300) is used for backing up large configuration (called enterprise backups). Let’s talk about the large configurations in this blog here. It is very exciting to talk about the large configuration which mainly caters to the enterprise world which wants to use the oracle environment in a bigger scale with higher IOPS and bandwidth along with lesser CPU utilization and latency. The large configuration of Ready Bundle for Oracle hosts 50 mixed-workload databases on a vSphere cluster with two ESXi 6 hosts on PowerEdge R940 servers. A VMAX 250F array with two V-Brick blocks, 2 x 1 TB mirrored cache and 105 TBe SSDs is used as the storage array for the VM OS and Oracle RAC databases. Figure 1 depicts the large-configuration architecture.

Fig. 1: Architecture of large configuration

The large configuration uses PowerEdge R940 servers, which are designed for larger workloads, to maximize enterprise application performance. The PowerEdge R940 servers are configured with 112 cores—88 more physical cores than the PowerEdge R740 servers in the small configuration and 40 more physical cores than the PowerEdge R940 servers in the medium configuration. The PowerEdge R940 server is configured with 3,072 GB—2,688 GB more than the R740 server in the small configuration and 1,920 GB more than the R940 server in the medium configuration. In Figure 2 we have performed a comparative analysis of the configurations for the small, medium (discussed in my previous blog) and large configurations of RBO.

Fig. 2: Comparative Analysis of small, medium and large configurations of Ready Bundle for Oracle

The comparative analysis will help the customers to select the appropriate configuration based on their requirements. There is also a tool available called VMAX sizer (available with the local support rep) which helps the customers to ascertain the appropriate configuration for their database/data center infrastructure. Now, I would like to discuss about the spectacular performances that were achieved during the stress-testing of large configuration for RBO. Let me provide some background for in-house database stress-testing which was performed by DellEMC engineers. The engineers ran 10 OLTP production RAC databases, 30 OLTP development RAC databases, and 10 OLAP RAC databases in parallel for a total mixed workload of 50 RAC databases. SLOB was used to create a 60/40 read/write OLTP workload. Swingbench Sales History benchmark was used for the OLAP workload generation. By adding the OLAP databases, they tested the VMAX 250F array along with large sequential reads to the storage workload. This load is reflected by the database size of 2 TB and the db_32k_cache_size and db_file_multiblock_read_count settings that enable larger database I/O to improve large sequential read performance. The entire architecture and database configuration of this use case has been depicted in the figure 3 and 4.

Fig 3: Architecture of the use case for large configuration

Fig 4 : Oracle RAC configuration for the use case in large configuration of RBO

The large configuration included two PowerEdge R940 servers and a VMAX 250F array. Here is a review of the results for this use case, in which the workload of 10 production OLTP databases, 30 development OLTP databases, and 10 OLAP databases ran in parallel:

• 100 vCPUs and 2,640 GB vMem per R940 computer server were used to generate a workload of over 189,968 IOPS on the VMAX array as is depicted in figure 5.
• Due to the processing power of the PowerEdge servers, the CPU utilization was only 20 percent, leaving room for more databases or for failover of VMs from one ESXi server to another.
• The VMAX array with inline deduplication and compression saved 5X the flash space, using only 8,280 GB of capacity for 30 development databases.
• Database IOPS was also excellent. The 189,000 IOPS of workload (highlighted in figure 5) were serviced at sub-millisecond latency.
• The 10 OLAP databases generated a total of 3.88 GB/s of throughput.

Fig 5. Aggregate IOPS numbers for the use case of large configuration

Figure 6 below illustrates the complete dashboard of the configuration and performance numbers (including the results that were discussed above) that got generated after the stress-testing for this use case in large configuration of RBO.

Fig 6. Stress-testing Dashboard of the use case for large configuration

The test results show that this configuration of RBO offer twice the number of supported IOPS compared to the small and medium configurations. The salient feature of this large configuration is that it supported just over 189,968 IOPS below sub-millisecond latencies for all OLTP databases. It supported the total bandwidth of 3.88 GB/sec using two PowerEdge R940 servers and a VMAX 250F with more flash drives. Under this database workload, a mere 20 percent of the CPU capacity was utilized, while the VMAX array accelerated 100 percent on most of the writes. Like the small and medium configurations, storage efficiency continued with 5X space savings across the 30 development OLTP databases due to the inline compression of VMAX 250F. In addition, the large configuration still had plenty of unused resources to support even greater workloads.  More use cases and configurations of large and other configurations(like small & medium etc.) can be viewed in the validation guide which explains the RBO in its entirety. In the next blog (Part III), I would like to discuss about a new Oracle solution on XtremIO X2 Array.

The best of all worlds: Dell EMC Ready Solution for Oracle (Part III)

In the last two blogs viz. Part I and Part II, I was talking about the oracle solution that was running on the DELLEMC VMAX storage along with many other components. In this blog, I will talk about one more oracle solution that is running on the top of the XtremIO X2 storage, though there are some variations in the use cases here. Before we delve into the details of the solution architecture, I would like to emphasize here that the taxonomy got changed this time from “Ready Bundle” to “Ready Solution”. Now, let’s look into architecture diagram as depicted in Figure 1.

Figure 1: Ready Solutions for Oracle with XtremIO X2 and Data Protection

In this solution, the Oracle databases operated in three different mode. The first is the bare metal 2-node RAC database running on two PowerEdge R940 servers and the second consists of two standalone snapshot databases running on R740 standalone server created from the first category via XtremIO XVC (XtremIO Virtual Copies) while the third one is comprised of two standalone virtualized databases of 11g and 12c versions. The whole architecture depicted in Figure 1 is supported by 2 X-Bricks XtremIO X2 cluster array and backed up by the Data Domain 6300 appliance. The DELLEMC engineers have run a rigorous and diversified testing over this oracle solution (as shown in Figure 1) and generated good results. We will discuss about the results in this blog along with the details of different use cases performed in four tests as depicted in Figure 2. In the first test the objective is to create a simple, standalone 2-node RAC database on a bare metal infrastructure with 2 X-Bricks. This architecture is then enhanced to accommodate 2 snapshot databases (created via XVC from Test 1) and finally two different standalone virtualized databases are created one of 11g Rel 2 version & the other database is of 12c . The complete details of the test case 1, 2, 3 and 4 are depicted in Figure 2.

Figure 2:  The details of the test case 1, 2, 3 and 4

Following the best practices of running oracle database on XtremIO platform, DELLEMC engineers generated good performance numbers which are depicted in Figure 3.

Figure 3: The performance numbers for Test 1,3,4

From Figure 3, we have observed that as we increase the workload in terms of OLTP and OLAP and in terms of different virtualized environments of 11g and 12c databases, the databases achieved higher IOPS and transactions per second (TPS) with sub-.85 milliseconds latencies. This is a spectacular performance keeping in view we used only 36 SSDs .

Summary

The Dell EMC Ready Solution for Oracle is an awesome solution with greater agility, operational efficiencies and resiliency in a single solution. Ready solutions for Oracle features like scalability, performance, consolidation, automation, centralized management and protection.  So far as technical virtues of this solution is concerned, it has been internally tested which delivers fantastic results in terms of higher IOPS, transactions per second (TPS), bandwidth, scalability, consolidation along with consistent sub-millisecond (less than .85 milliseconds) latencies even after adding enhanced OLTP and OLAP workloads in a bare metal and virtualized environments. It helps companies to reduce typical company’s financial costs like its CAPEX and OPEX . Additionally, the Dell EMC R740/R940 Servers can sustain multiple and larger workloads with less CPU and memory utilization. When we talk of Dell EMC XtremIO X2 storage we observed that it has generated 131K+ IOPS (in-house) along with higher throughput and less than .85 millisecond latencies for mixed workloads. Repurposing copies generated by the XtremIO Virtual Copies(XVC) helps in 1.8X  storage space savings due to the inline deduplication and compression features of XtremIO X2 arrays. In summary, the Dell EMC Ready solution for Oracle is a winning, integrated, validated, flexible and configurable solution in all aspects as it combines the best of all the worlds of a typical data center. In the next blog, we will continue discussing the good features of this solution which involves the mixed workload options using both Oracle and Sql Server databases.

The best of all worlds: Dell EMC Ready Solution for Oracle (Part IV)

In the last three blogs (Part I, Part II and Part III), we were talking about the Oracle Ready Solutions running on diverse storage platforms ranging from PowerMax (formerly called VMAX) to XtremIO. In the previous blogs we highlighted the scalability, performance, and effectiveness of Oracle solutions on diverse storage platforms. In this blog, we demonstrate that Oracle solutions not only run on multiple platforms, but also effectively support multiple and diverse workloads that emanate from multiple RDBMS databases like Oracle and SQL Server.

 Mixed database workloads combine online transaction processing (OLTP), decision support systems (DSS), and snapshot OLTP (Snap OLTP) workloads that have historically been difficult to manage on the same infrastructure, while maintaining consistent performance and higher scalability. Heterogeneous databases (like Oracle and SQL Server) with different functionality and architectures feature competing data center demands and requirements including CPU usage, memory utilization, and storage and networking requirements.

 The biggest challenge in operating these types of heterogeneous workloads and databases is that the storage system cannot be tuned for one workload or the other; instead, it must be balanced to support both database loads at performance levels that meet service level agreements (SLAs).

 The PowerMax 2000 with NVM Express (NVMe) flash drives introduces improvements in performance and parallelism that provide an ideal match for mixed database workloads. NVMe flash drives offer increased speed and the ability to service more requests in parallel. The storage system (PowerMax 2000) combined with the robust compute layer (PowerEdge MX7000 modular chassis) forma lethal combination which drive mixed workloads toward improved, predictable, and consistent performance with greater IOPS, scalability, management consolidation, lower response time , and decreased latency and risk.

Figure 1.       Architecture of mixed workloads

Now, let’s dive deep and understand the inside architecture of this Oracle solution (depicted in Figure 1) before we introduce the outstanding bench-marking numbers attained during the testing.

In the above figure, two different databases (Sql Server and Oracle) are running in parallel within the DellEMC PowerEdge servers using the PowerMax 2000 storage. In this solution architecture, we used the Dell EMC PowerEdge MX7000 modular chassis, which provides a high-performance data center infrastructure, for both compute and network resources. The compute or server resources for this reference architecture are:

• PowerEdge MX7000 modular chassis provides a high-performance data center infrastructure including compute and network resources for this solution.
  • Compute resources:
    • - One PowerEdge MX840c blade for Oracle databases
    • - One PowerEdge MX840c blade for SQL Server databases
  • Networking resources:
    • - MX840c blade subcomponents à Each MX840c blade used for the Oracle and SQL Server databases consists of four Intel Xeon Scalable 20c physical CPUs, 1,536 GB of RAM, and four QLogic QL41262 dual-port 25 GbE mezzanine
    • - Two MX9116n Fabric Switching Engine (FSE) I/O Modules (IOMs) or switches (for networking layer)
    • - Redundant MX management module
• PowerMax 2000 storage array
• Data Domain DD9300 backup appliance (will be discussed later in the upcoming blog).

The software stack for this solution is described in the figure below.

Figure 2.       The software stack for DellEMC mixed workloads solution

 The details of the entire architectural design is discussed in the validation guide here.

The Dell EMC engineers have performed three use cases to understand the efficacy of this solution. The use cases are

1. Use case 1: OLTP workload using TPC-C–like benchmark
2. Use case 2: DSS workload using TPC-H–like benchmark
3. Use case 3: Snapshot OLTP workload using TPC-C–like benchmark

 After running several in-house stress tests with bench-marking tools like TPC-C and TPC-H, the Dell EMC engineers have achieved some spectacular results in terms of CPU utilization, transactions per minute (TPM), IOPS, NOPM, storage IOPS ,latency and throughput. The results are displayed in this document in the form of graphs. I will include a detailed analysis of the different bench-marking numbers in my next blog.

 The IOPS performance parameter is very important because it shows how fast transaction data can be retrieved from storage by the compute layer. Figure 3 shows that during mixed workload stress-testing, more than 100,000 IOPS were generated with less than 1 milli-second of latency (depicted in figure 4) using a small 24 NVMe flash drive configuration. In Figure 3 we also observe that 3 different workloads (OLTP, DSS, and snapshot OLTP) ran in parallel and generated remarkable performance numbers (Use Case 3).

Figure 3.       IOPS performance numbers of Oracle Solutions with mixed workloads

Figure 4.       Consolidated IOPS and latency numbers for the Use case 3

 As shown in Figure 5, IOPS performance remained consistent between the baseline OLTP test and the test with all workloads running. When all workloads were running in parallel, IOPS remained within 4 percent of the baseline. Average read latency for all the databases remained under 1 ms with one exception: Snapshot OLTP SQL Server 1. Because this database was simulating a test and development workload, the slightly higher latency was not significant in evaluating overall performance.

Figure 5.       Consolidated IOPS, latency, and throughput numbers for use case 3 

The other salient feature of this mixed workload solution’s performance is that the average write latency for all databases remained under 1 ms. Even with eight databases with mixed workloads running in parallel, most of the write latencies were under .31 ms. The exception was the OLTP Oracle database with .75 ms average writes for logs (still under 1 ms). This characteristic can be observed in Figure 6 below.

Figure 6.       Average write latency of mixed workloads

Another important performance parameter is the throughput for the decision support system as depicted in Figure 5 and in Figure 7 below. As shown in both figures, the throughput improves or remains constant with the addition of new workloads/applications/databases. The greater the number of databases, the more IOPS on the storage array and the greater the latency. This trade off among throughput, IOPS, and latency happens over time as more complex workloads are run. Initially the storage performance is good, and databases have low latency times. With time, more applications are added to the array and the trade-off is weighted toward IOPS, which adversely impacts database and application performance. The throughput numbers are not greatly impacted by the addition of workloads. On the contrary, throughput actually improves for the SQL Server databases 1 and 2, as shown in Figure 7.

Figure 7.       Average throughput of Decision Support workload of Oracle Solutions with mixed workloads

I will describe and analyze some other performance numbers like TPM, NOPM, CPU, memory utilization, etc. in my next blog.

Summary

The Dell EMC Ready Solution for Oracle is an effective solution that has been internally tested and proven to offer greater IOPS, transactions per second (TPS), bandwidth, scalability, consolidation agility, operational efficiencies and resiliency in a mixed workload solution for bare metal and virtualized environments. This mixed database/mixed workload system, which uses two PowerEdge MX840c servers and an entry-level PowerMax 2000 storage array with 24 NVMe flash drives, is a powerful and cost-effective solution. The PowerMax 2000 storage array delivered over generated 106,139 IOPS using a small 24 NVMe flash drive configuration with latencies under 1 ms. The PowerMax configuration can scale to 96 NVMe flash drives, which is four times larger than the configuration that we used in our testing.

When the IOPS or the workload increases, the throughput also increases. In our findings, we observed that throughput improved with the scaled complexity of the mixed workloads. For example, when the IOPS (OLTP + DSS) on a SQL Server database was 6,720, the throughput was 625 MB/s, and when the IOPS (OLTP + DSS + SNAP) was 7,587, the throughput was 714 MB/s. Increasing workloads did not greatly affect Oracle database throughput either.

Obviously, companies benefit from reducing financial costs like CAPEX and OPEX. In summary, the Dell EMC Ready Solution for Oracle is a winning, integrated, validated, flexible and configurable solution that combines the best of all worlds for the datacenter environment. In the next blog, we will continue discussing additional features of this solution along with the backup and recovery options.