![]() See SQL Server Configuration for specific recommendations for SQL Server. For more information on this subject, see VMware KB article 2091600 or Device Sector Formats in the vSphere Storage Guide. You can obtain the best storage performance if your workload issues mostly 4K-aligned I/Os. AWS Windows Amazon Machine Images (AMIs) contain a set of drivers that are used by Amazon EC2 to map instance store and EBS volumes to Windows disks and drive. VMware Cloud on AWS uses drives with 4KB sector size (that is, 4KB native, or 4Kn), but presents storage to the guest with 512B sector size (512 native). For further information you might want to refer to the literature from the operating system vendor regarding appropriate tools to use as well as recommendations from the array vendor. Make sure the disk partitions within the guest are aligned. For additional information see VMware KB article 9645697. ![]() Changing the guest operating system’s registry settings to issue larger block size I/O requests can eliminate this splitting, thus enhancing performance. or few partitions on xvd disk attached to FV guest > change/add xvda to xvdb, xvbd, etc. In some cases large I/O requests issued by applications in a virtual machine can be split by the guest storage driver. Upload the VM image to S3 using the AWS CLI. Most likely, this means that you ran Microsofts Xbox Play Anywhere service to play Xbox games remotely. If you see XVD Drives suddenly appearing on your PC, it most likely means you have recently run an Xbox application. See the driver-specific documentation for more information on how to adjust these settings. Why XVD Drives Are Showing Up on Your PC. A queue depth that is too small, for example, limits the disk bandwidth that can be pushed through the virtual machine. The depth of the queue of outstanding commands in the guest operating system SCSI driver can significantly impact disk performance. Compared to virtual SATA devices, the vNVMe virtual storage adapter accesses local PCIe SSD devices with much lower CPU cost per I/O and significantly higher IOPS. The Non-Volatile Memory Express (NVMe) virtual storage adapter (virtual NVMe, or vNVMe) allows recent guest operating systems that include a native NVMe driver to use that driver to access storage through VMware Cloud on AWS. If you choose to use the BusLogic Parallel virtual SCSI adapter, and are using a Windows guest operating system, you should use the custom BusLogic driver included in the VMware Tools package. For additional information see VMware KB article 1010398. These bare metal instances also offer support for NVMe storage.PVSCSI adapters are supported for boot drives in only some operating systems. These machines provide direct access to all the features of the underlying hardware, making them ideal for running applications that simply can’t run on virtualized hardware and for running secured container clusters. On top of the NVMe announcement, AWS today also noted that its EC2 Bare Metal Instances are now generally available. Those are highly specialized machines, though, while the C5 instances are interesting to a far wider audience of developers. ![]() It’s worth noting that the EC2 F1 instances, which offer access to FPGAs, also use NVMe storage. Examples include hard disks, CD-ROM drives, and flash drives. These devices support random access and generally use buffered I/O. Regular C5 machines start at $0.085 per hour. Block device mapping concepts A block device is a storage device that moves data in sequences of bytes or bits (blocks). Prices are, unsurprisingly a bit higher than for regular C5 machines, starting at $0.096 per hour for the most basic machine with 4 in AWS’s Oregon region, for example. regions, as well as in the service’s Canada regions. An OVF package always contains exactly one OVF descriptor (a file with extension. ![]() An OVF package consists of several files placed in one directory. The new instances are now available in a number of AWS’s U.S. The unit of packaging and distribution is a so-called OVF Package which may contain one or more virtual systems each of which can be deployed to a virtual machine. Since the local storage is attached to the machine, it’ll also be terminated when the instance is stopped, so this is meant for storing intermediate files, not long-term storage.īoth C5 and C5d instances share the same underlying platform, with 3.0 GHz Intel Xeon Platinum 8000 processors. AWS cites high-performance computing workloads, real-time analytics, multiplayer gaming and video encoding as potential use cases for its regular C5 machines and with the addition of this faster storage option, chances are users who switch will see even better performance. These new so-called C5d instances join the existing lineup of compute-optimized C5 instances the service already offered. These new machines feature local NVMe storage, which offers significantly faster throughput than standard SSDs. AWS is adding a new kind of virtual machine to its growing list of EC2 options. ![]()
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