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Deploying SAP on Google Cloud : Part 1

 Connect to Google  Connection Method To be Used for Speed Explanation Example Uses Cloud VPN Proof of Concept Variable, up to 3 Gbps Connects on-premises network to Google Cloud securely over the internet using IPsec VPN tunnels. Creating a Cloud VPN tunnel between on-premises and Google Cloud. Encrypted IPsec tunnels Dedicated Interconnect For Enterprise level connect 10 Gbps to 100 Gbps Provides a dedicated, private connection between on-premises and Google Cloud through Google's network. Provisioning a dedicated interconnect connection. Direct physical connection between on-premises and Google Cloud network infrastructure Partner Connect If you have a data center which cannot be reached to Dedicated Google facility. Variable, up to 100 Gbps Allows connecting to Google Cloud through supported service providers. Establishing a connection with a supported service provider. Utilizes service provider's network infrastructure. Configure Tunnels with Google Cloud Platform IPsec

KPIs for Recovery in HANA Database Administration

Introduction: In the dynamic landscape of database administration, ensuring the robustness of a system is paramount. One crucial aspect that demands meticulous attention is the recovery process following a system failure. Two key performance indicators (KPIs) stand out in this realm – Recovery Point Objective (RPO) and Recovery Time Objective (RTO) . In this technical blog, we will delve into the significance of these KPIs for HANA database administrators and explore strategies to optimize them. Recovery Point Objective (RPO): RPO is a critical metric that defines the maximum acceptable data loss in the event of a system failure . For HANA database administrators, establishing an RPO involves a careful balance between data consistency and the overhead of continuous data replication. Continuous Data Backups: To meet stringent RPO requirements, implementing continuous data backups is imperative. Utilizing HANA's native backup capabilities and integrating them with a robust backup s

Notes for Build Resilient Applications on SAP BTP with Amazon Web Services [ Week 1]

Welcome back to the next chapter in our ongoing series dedicated to unraveling the dynamic interplay between SAP Business Technology Platform (BTP) and Amazon Web Services (AWS). For those just joining us, this blog serves as an invaluable resource for individuals delving into the world of SAP BTP or seeking a comprehensive reference guide. SAP BTP, or SAP Business Technology Platform, is a comprehensive platform that brings together various essential capabilities for application development, automation, data management, analytics, planning, integration, and AI. These features are all integrated into a unified environment, making it user-friendly for both professional IT developers and citizen developers. Image Credit  Key Features of SAP BTP: Application Development: SAP BTP offers a range of tools for development. For instance, SAP Build enables low-code development, while the SAP Business Application Studio caters to core developers, providing services like document management and m

Execute HANASitter for hang situation analysis

The SAP HANAsitter is configured to perform default checks once every hour to ascertain the online and primary status of SAP HANA. Upon confirmation, it initiates tracking procedures, which involve regular responsiveness assessments (typically every minute). If SAP HANA becomes unresponsive, the HANAsitter commences recording activities, potentially capturing call stacks of active threads, run-time dumps, index server gstacks, and/or kernel profiler traces, although, by default, no recording occurs. When SAP HANA is responsive, the script scrutinizes critical features, including a standard check for more than 30 active threads. If this threshold is exceeded, the script triggers recording. Upon completing the recording process, the script exits, with an option to be configured for restart using the command line. Setup Steps Overview: Begin by creating an SAP HANA user with the desired name (e.g., HANASITTER) and assign the CATALOG READ privilege to it. Establish a user key in the hdbuse

Huge Multiversion Concurrency Control (MVCC) Versions in HANA

What is MVCC? MVCC is a database concurrency control method that allows multiple transactions to occur concurrently without conflicting with each other. In a nutshell, it ensures that each transaction sees a snapshot of the database at a specific point in time, even if other transactions are making changes concurrently. MVCC in SAP HANA: SAP HANA uses MVCC to manage concurrent access to data. Each transaction in HANA sees a consistent snapshot of the data at the time the transaction began. This is achieved by maintaining multiple versions of a data row, each associated with a specific transaction or point in time. The Issue of Huge MVCC Versions: Now, the term "Huge MVCC Versions" indicates a situation where there is a significant number of these versions for a particular set of data. Here's why this might become a problem: Increased Memory Usage: Each version of a data row consumes memory. As the number of versions increases, the overall memory consumption by the databas

What happens at HANA System Restart after crash

The SAP HANA system restart sequence is a process that efficiently brings the system back to a fully functional state. Here's a breakdown of the steps involved: Reading Restart Records: The restart agent of the persistence layer accesses the data volume of each service to read and load the restart record. Managing Transactions: The list of open transactions is read into memory. Row tables are loaded into memory. Processing Open Transactions: Open transactions are processed using the redo log. Transactions that were open when the database was stopped are rolled back. Changes to committed transactions that were not written to the data area are rolled forward. Handling Aborted Transactions: Aborted transactions are identified and rolled back. Creating Savepoint: A savepoint is performed, capturing the restored consistent state of the database. Column tables that are marked for preload, and their attributes, are asynchronously loaded in the background: The preload parameter is configur

SAP HANA Cockpit Introduction and Use Case

The SAP HANA cockpit 2.0 provides a single point of access to a range of tools for administration and detailed monitoring of SAP HANA databases. It also integrates development capabilities required by administrators through the SAP HANA Database Explorer.  The SAP HANA cockpit 2.0 is a web-based HTML5 user interface that you access through a browser. It runs on SAP HANA extended application services, advanced model (XS advanced).  The cockpit handles single-container and multi-container systems as of SAP HANA 1.0 SPS 12.  You can use the cockpit to monitor and manage multiple SAP HANA database systems and tenants The cockpit can be installed separately on dedicated hardware, shared hardware or in an existing SAP HANA database tenant. It provides greater flexibility, because it allows you to manage more than one SAP HANA system in a single administration environment SAP HANA Cockpit :  Centralized system and database administration features, such as database monitoring, user management,