Exadata X8M-2 Multi-Rack Introduction

Exadata X8M-2 Multi-Rack Introduction

SUBJECTS

1-) Exadata X8M-2

• Exadata type history
• Main goals of exadata using
• What is exadata X8M-2
• Explore Exadata Database Machine X8M-2
• X8M-2 component features
• New in Exadata X8M-2
• RDMA
• RDMA over Converged Ethernet (RoCE)
• Exadata X8M Shared Persistent Memory
• Persistent memory mirroring increases reliability
• X8M-2 Multi-Rack Switch Structure

2-) Exadata System Software Version 20.1.9

• What’s New in Oracle Exadata Database Machine 20.1.0
• Exadata System Software Release 20.1.0.0.0 is now generally available.
• Exadata System Software Update 20.1.9.0.0

3-) Consequently

4-) Referances

1-) Exadata X8M

Exadata type history;

Main Goals of Exadata Using;

What Is Exadata X8M?

Exadata X8M is the latest generation Exadata Database Machine .  That provides in-memory performance for both OLTP and Analytics with capacity, sharing, and cost benefits of shared storage.

Exadata X8M introduces three new  technologies:

Native Persistent Memory

New RDMA over Converged Ethernet (RoCE) Network Fabric

Ultra-Fast RDMA to Persistent Memory Access

Explore Exadata Database Machine X8M

Some important features;

• Exadata X8M-2 eighth rack

Customers achieve high Oracle Database performance with an entry-level Exadata system that delivers up to 1.5M SQL Read IOPS and up to 60 GB/second of SQL throughput. The system includes 48 total CPU cores, 4.5 TB PMEM, and either 22TB of all-flash or 75 TB of HDD usable storage capacity inclusive of 3-way storage mirroring.

• Unique features accelerate results

Exadata X8M’s exclusive capabilities, like the Persistent Memory Data Accelerator developed with Oracle Database, accelerates diverse customer workloads, with up to 16 million SQL read IOPS, more than 560 GB/second of SQL throughput, and SQL read latency under 19 microseconds.

• Oracle Multitenant improves consolidation efficiency

Oracle Multitenant enables customers to simplify database management and lower costs by consolidating up to 4,096 pluggable databases per container database on Exadata X8M, 16X more than on other systems.

• Oracle Database In-Memory accelerates analytics

Oracle Database In-Memory on Exadata X8M simultaneously creates optimized row and column database formats within a single database instance. Dual database formats allow customers to quickly perform real-time analytics on production OLTP databases.

• Low-latency accelerates transaction processing

Application-transparent use of PMEM in Exadata X8M storage servers accelerates crucial customer transactional Oracle Database workloads with 19 microsecond read latencies, ultra-fast log writes, and up to 16 million read SQL IOPS per rack.

• High-throughput speeds analytics

High-throughput RDMA over Converged Ethernet (RoCE) internal networking reduces system latencies so customers can rapidly process data with up to 560 GB/s throughput from all-flash storage and 1 TB/s with scale-out Oracle Database In-Memory capabilities.

• Intelligent storage improves workload performance

Exadata X8M offloads SQL queries, in-memory analytics, and machine learning algorithms from database servers to up to 19 intelligent storage servers per rack to accelerate diverse customer workloads.

• Automated management optimizes results

IO Resource Manager automatically optimizes resource allocations and prioritizes IOs to deliver consistently fast results for all types of customer database workloads in consolidated environments.

• Smart Flash Cache

Up to 358 TB of NVMe flash cache per rack gives customers the performance of flash storage with the capacity and cost of disk storage by eliminating up to 95% of all disk IOs.

X8M-2 component features

New in Exadata X8M

RDMA

Remote Direct Memory Access (RDMA) is the ability for one computer to access data from a remote computer without OS or CPU involvement, bypassing the entire network and I/O stack, that is network and I/O software, interrupts, context switches. RDMA was introduced to Exadata with InfiniBand and is a foundational part of Exadata’s high-performance architecture.

RDMA enables direct transfer of data from application buffers on local node to application buffer on the remote node without CPU involvement.

RDMA over Converged Ethernet (RoCE)

Remote Direct Memory Access (RDMA) is the ability for one computer to access data from a remote computer without OS or CPU involvement: the network card directly reads/writes memory with no extra copying or buffering resulting in very low latency. RDMA was introduced to Exadata with InfiniBand and is a foundational part of Exadata’s high-performance architecture. RDMA enables several unique Exadata features, such as Direct-to-Wire Protocol and Smart Fusion Block Transfer.

Through smart Exadata System Software 19.3.0, Exadata X8M also practically eliminates database stalls due to failure by immediately detecting server failures. Server failure detection normally requires a long timeout to avoid false server evictions from the cluster, however it is hard to distinguish between a server failure, and a slow response to the heartbeat due to a busy CPU. Exadata X8M Instant Failure Detection is not affected by OS or CPU response times, as it uses the hardware based RDMA to quickly confirm server response. Four RDMA reads are sent to the suspect server across all combinations of source/target ports. If all four reads fail, the server is evicted from the cluster. If a port responds, the hardware is available, even if the software is slow.

Exadata X8M Shared Persistent Memory

Persistent memory mirroring increases reliability

Exadata X8M Storage Servers transparently incorporate persistent memory in front of flash memory. This opens up the ability for Oracle Database to use RDMA instead of I/O to read remote persistent memory. By bypassing the network, I/O software, interrupts and context switches, latency is reduced from 250 microseconds to less than 19 microseconds, over 10x improvement. Adding persistent memory to the storage tier makes the aggregate performance across all storage servers dynamically available to any database on any server. Also, as only the hottest data is moved into persistent memory, it means a better utilization of persistent memory capacity can be achieved. For fault-tolerance, Exadata’s smart software mirrors this cached data across storage server’s persistent memory tier, protecting data from hardware failures.

X8M-2 Multi-Rack Switch Structure

2-) Exadata System Software Version 20.1.9

What’s New in Oracle Exadata Database Machine 20.1.0

The following features are new for Oracle Exadata System Software 20.1.0:

• Exadata Secure RDMA Fabric Isolation
• Smart Flash Log Write-Back
• Fast In-Memory Columnar Cache Creation
• Cell-to-Cell Rebalance Preserves PMEM Cache Population
• Control Persistent Memory Usage for Specific Databases
• Application Server Update for Management Server

Exadata System Software Release 20.1.0.0.0 is now generally available.

• This release follows Exadata System Software Release 19.3, bringing further innovations for smarter infrastructure, improved performance, and smarter management.

There have been over 20 unique software features released in the last year including improved performance for all database workloads. Not only across traditional workloads such as transaction processing, analytics, consolidation, but including support for modern multi-mode applications such as IoT, Machine Learning, gaming, and eCommerce. We continue our tradition of protecting your investment in Exadata, with all new software features compatible across RoCE and InfiniBand systems, and all supported Exadata hardware generations.

• For Exadata X8M RoCE systems, this new feature builds on the existing Exadata Smart Flash Cache feature that preserves data during cell-to-cell rebalancing operations, enabling the Persistent Memory Data Accelerator to rebalance the persistent memory (PMEM) cache automatically to maintain consistent application performance. When a rebalance operation moves data to a different storage server, for example after a hard disk suffers a real or predictive failure, any data that might be cached in the Persistent Memory Data Accelerator in the source storage server will be replicated to the target storage server automatically.

Exadata System Software Update 20.1.9.0.0

• Exadata System Software 20.1.9.0.0 Update is now generally available. 20.1.9.0.0 is a maintenance release that adds critical bug fixes and security fixes on top of 20.1.X releases. It contains the following:
• Exadata Software updates for important bugs discovered after 20.1.8.0.0 was released in March 2021
• Latest Ksplice Uptrack Updates for OL7 and OVS with critical and security updates
• Updated Disk Controller Firmware on X5-2, X6-2, X7-2, X8-2 and X8M-2 servers with the latest important fixes
• Updated InfiniBand (IB) Switch Firmware (2.2.16-2)
• Latest Jetty version update
• Note: Starting 20.1.x.0.0 release, the Storage and Database Server ISO/PXE image files are available only on edelivery/OSDC :
• Part V1008184-01 – Storage cell ISO/PXE image (20.1.9.0.0.210416)
• Part V1008185-01 – Database server ISO/PXE image (20.1.9.0.0.210416)
• For further information, see:
• Exadata 20.1.9.0.0 release and patch (32738303) (Doc ID 2757946.1)
• Exadata Database Machine and Exadata Storage Server Supported Versions (Doc ID 888828.1)
• For Exadata X8M RoCE systems, this new feature builds on the existing Exadata Smart Flash Cache feature that preserves data during cell-to-cell rebalancing operations, enabling the Persistent Memory Data Accelerator to rebalance the persistent memory (PMEM) cache automatically to maintain consistent application performance. When a rebalance operation moves data to a different storage server, for example after a hard disk suffers a real or predictive failure, any data that might be cached in the Persistent Memory Data Accelerator in the source storage server will be replicated to the target storage server automatically.

Footnote:

This version fixed most ora-600 db errors

3-) Consequently

In this article, we learned about X8m-2 new features, 20.1 new features.

4-) Referances

https://oracle.com/

https://k21academy.com/dba-to-cloud-dba/new-update-exadata-x8m-now-available-on-oracle-cloud-oci/