Merge pull request #53410 from GeoffMaciolek/patch-1

Spelling: "stripped" should be"striped"

Author: ktoliver

articles/virtual-machines/windows/sql/virtual-machines-windows-sql-performance.md

@@ -36,7 +36,7 @@ The following is a quick check list for optimal performance of SQL Server on Azu
 | --- | --- |
 | [VM size](#vm-size-guidance) | - Use VM sizes with 4 or more vCPU like [E4S_v3](../../ev3-esv3-series.md) or higher, or [DS12_v2](../../dv2-dsv2-series-memory.md) or higher.<br/><br/> - [Es, Eas, Ds and Das Series](../../sizes-general.md) offers the optimum memory to vCPU ratio required for OLTP workload performance. <br/><br/> - [M Series](../../m-series.md) offers the highest memory to vCPU ratio required for mission critical performance and is ideal for data warehouse workloads. <br/><br/> - Collect the target workload's [IOPS](../premium-storage-performance.md#iops), [throughput](../premium-storage-performance.md#throughput)  and [latency](../premium-storage-performance.md#latency) requirements at peak times by following the [application performance requirements checklist](../premium-storage-performance.md#application-performance-requirements-checklist) and then select the [VM Size](../sizes-general.md) that can scale to your workload's performance requirements.|
 | [Storage](#storage-guidance) | - For detailed testing of SQL Server performance on Azure VMs with TPC-E and TPC_C benchmarks, refer to the blog [Optimize OLTP performance](https://techcommunity.microsoft.com/t5/SQL-Server/Optimize-OLTP-Performance-with-SQL-Server-on-Azure-VM/ba-p/916794). <br/><br/> - Use [premium SSDs](https://techcommunity.microsoft.com/t5/SQL-Server/Optimize-OLTP-Performance-with-SQL-Server-on-Azure-VM/ba-p/916794) for the best price/performance advantages. Configure [ReadOnly cache](../premium-storage-performance.md#disk-caching) for data files and no cache for the log file. <br/><br/> - Use [Ultra Disks](../disks-types.md#ultra-disk) if less than 1 ms storage latencies are required by the workload. <br/><br/> - Collect the storage latency requirements for SQL Server data, log, and Temp DB files by [monitoring the application](../premium-storage-performance.md#application-performance-requirements-checklist) before choosing the disk type. If <1ms storage latencies are required, then use Ultra Disks, otherwise use premium SSD. If low latencies are only required for the log file and not for data files, then [provision the Ultra Disk](../disks-enable-ultra-ssd.md) at required IOPS and throughput levels only for the log File. <br/><br/> -  [Premium file shares](virtual-machines-windows-portal-sql-create-failover-cluster-premium-file-share.md) are recommended as shared storage for a SQL Server failover cluster Instance. Premium file shares do not support caching, and offer limited performance compared to premium SSD disks. Choose premium SSD-managed disks over premium file shares for standalone SQL instances; but leverage premium file shares for failover cluster instance shared storage for ease of maintenance and flexible scalability. <br/><br/> -  Standard storage is only recommended for development and test purposes or for backup files and should not be used for production workloads. <br/><br/> - Keep the [storage account](../../../storage/common/storage-create-storage-account.md) and SQL Server VM in the same region.<br/><br/> - Disable Azure [geo-redundant storage](../../../storage/common/storage-redundancy.md) (geo-replication) on the storage account.  |
-| [Disks](#disks-guidance) | - Use a minimum of 2 [premium SSD disks](../disks-types.md#premium-ssd) (1 for log file and 1 for data files). <br/><br/> - For workloads requiring <1 ms IO latencies, enable write accelerator for M series and consider using Ultra SSD disks for Es and DS series. <br/><br/> - Enable [read only caching](../premium-storage-performance.md#disk-caching) on the disk(s) hosting the data files.<br/><br/> - Add additional 20% premium IOPS/throughput capacity than your workload requires when [configuring storage for SQL Server data, log, and TempDB files](virtual-machines-windows-sql-server-storage-configuration.md) <br/><br/> - Avoid using operating system or temporary disks for database storage or logging.<br/><br/> - Do not enable caching on disk(s) hosting the log file.  **Important**: Stop the SQL Server service when changing the cache settings for an Azure VM disk.<br/><br/> - Stripe multiple Azure data disks to get increased storage throughput.<br/><br/> - Format with documented allocation sizes. <br/><br/> - Place TempDB on the local SSD `D:\` drive for mission critical SQL Server workloads (after choosing correct VM size). If you create the VM from Azure portal or Azure quickstart templates and [place Temp DB on the Local Disk](https://techcommunity.microsoft.com/t5/SQL-Server/Announcing-Performance-Optimized-Storage-Configuration-for-SQL/ba-p/891583) then you do not need any further action; for all other cases follow the steps in the blog for  [Using SSDs to store TempDB](https://cloudblogs.microsoft.com/sqlserver/2014/09/25/using-ssds-in-azure-vms-to-store-sql-server-tempdb-and-buffer-pool-extensions/) to prevent failures after restarts. If the capacity of the local drive is not enough for your Temp DB size, then place Temp DB on a storage pool [stripped](../premium-storage-performance.md) on premium SSD disks with [read-only caching](../premium-storage-performance.md#disk-caching). |
+| [Disks](#disks-guidance) | - Use a minimum of 2 [premium SSD disks](../disks-types.md#premium-ssd) (1 for log file and 1 for data files). <br/><br/> - For workloads requiring <1 ms IO latencies, enable write accelerator for M series and consider using Ultra SSD disks for Es and DS series. <br/><br/> - Enable [read only caching](../premium-storage-performance.md#disk-caching) on the disk(s) hosting the data files.<br/><br/> - Add additional 20% premium IOPS/throughput capacity than your workload requires when [configuring storage for SQL Server data, log, and TempDB files](virtual-machines-windows-sql-server-storage-configuration.md) <br/><br/> - Avoid using operating system or temporary disks for database storage or logging.<br/><br/> - Do not enable caching on disk(s) hosting the log file.  **Important**: Stop the SQL Server service when changing the cache settings for an Azure VM disk.<br/><br/> - Stripe multiple Azure data disks to get increased storage throughput.<br/><br/> - Format with documented allocation sizes. <br/><br/> - Place TempDB on the local SSD `D:\` drive for mission critical SQL Server workloads (after choosing correct VM size). If you create the VM from Azure portal or Azure quickstart templates and [place Temp DB on the Local Disk](https://techcommunity.microsoft.com/t5/SQL-Server/Announcing-Performance-Optimized-Storage-Configuration-for-SQL/ba-p/891583) then you do not need any further action; for all other cases follow the steps in the blog for  [Using SSDs to store TempDB](https://cloudblogs.microsoft.com/sqlserver/2014/09/25/using-ssds-in-azure-vms-to-store-sql-server-tempdb-and-buffer-pool-extensions/) to prevent failures after restarts. If the capacity of the local drive is not enough for your Temp DB size, then place Temp DB on a storage pool [striped](../premium-storage-performance.md) on premium SSD disks with [read-only caching](../premium-storage-performance.md#disk-caching). |
 | [I/O](#io-guidance) |- Enable database page compression.<br/><br/> - Enable instant file initialization for data files.<br/><br/> - Limit autogrowth of the database.<br/><br/> - Disable autoshrink of the database.<br/><br/> - Move all databases to data disks, including system databases.<br/><br/> - Move SQL Server error log and trace file directories to data disks.<br/><br/> - Configure default backup and database file locations.<br/><br/> - [Enable locked pages in memory](/sql/database-engine/configure-windows/enable-the-lock-pages-in-memory-option-windows?view=sql-server-2017).<br/><br/> - Apply SQL Server performance fixes. |
 | [Feature-specific](#feature-specific-guidance) | - Back up directly to blob storage.<br/><br/>- Use [file snapshot backups](/sql/relational-databases/backup-restore/file-snapshot-backups-for-database-files-in-azure) for databases larger than 12 TB. <br/><br/>- Use multiple Temp DB files, 1 file per core, up to 8 files.<br/><br/>- Set max server memory at 90% or up to 50 GB left for the Operating System. <br/><br/>- Enable soft NUMA. |
 
@@ -77,7 +77,7 @@ Default caching policy on the operating system disk is **Read/Write**. For perfo
 
 The temporary storage drive, labeled as the **D** drive, is not persisted to Azure blob storage. Do not store your user database files or user transaction log files on the **D**: drive.
 
-Place TempDB on the local SSD `D:\` drive for mission critical SQL Server workloads (after choosing correct VM size). If you create the VM from Azure portal or Azure quickstart templates and [place Temp DB on the Local Disk](https://techcommunity.microsoft.com/t5/SQL-Server/Announcing-Performance-Optimized-Storage-Configuration-for-SQL/ba-p/891583), then you do not need any further action; for all other cases follow the steps in the blog for  [Using SSDs to store TempDB](https://cloudblogs.microsoft.com/sqlserver/2014/09/25/using-ssds-in-azure-vms-to-store-sql-server-tempdb-and-buffer-pool-extensions/) to prevent failures after restarts. If the capacity of the local drive is not enough for your Temp DB size, then place Temp DB on a storage pool [stripped](../premium-storage-performance.md) on premium SSD disks with [read-only caching](../premium-storage-performance.md#disk-caching).
+Place TempDB on the local SSD `D:\` drive for mission critical SQL Server workloads (after choosing correct VM size). If you create the VM from Azure portal or Azure quickstart templates and [place Temp DB on the Local Disk](https://techcommunity.microsoft.com/t5/SQL-Server/Announcing-Performance-Optimized-Storage-Configuration-for-SQL/ba-p/891583), then you do not need any further action; for all other cases follow the steps in the blog for  [Using SSDs to store TempDB](https://cloudblogs.microsoft.com/sqlserver/2014/09/25/using-ssds-in-azure-vms-to-store-sql-server-tempdb-and-buffer-pool-extensions/) to prevent failures after restarts. If the capacity of the local drive is not enough for your Temp DB size, then place Temp DB on a storage pool [striped](../premium-storage-performance.md) on premium SSD disks with [read-only caching](../premium-storage-performance.md#disk-caching).
 
 For VMs that support premium SSDs, you can also store TempDB on a disk that supports premium SSDs with read caching enabled.