• In case of NVME device, Vendor unique (such as FA log) features may not work for SSDs in Linux kernel 4. So in case of Namespace Management Command, NVMe controller would just give another command to SSD Controller, to create Namespace & SSD Controller would create it with provided size (Considering addresses do not conflict with any else). There are lots of Do or Do'not detail on MSDN regarding Naming of namespace, Assemblies etc. NET 2 comments - This post in romanian A namespace designates a collection of programming elements, organized and classed for grouping operations and easy access. getUserId(), which returns a unique, permanent ID for the user. Controller, Namespace, ) to manage NVMe resources in the scripts, like this: # create an NVMe controller with its PCIe address nvme0=d. The format of namespaces is: namespace identifier {entities}. delete-ns Deletes a namespace from the controller. Each namespace must be declared using the keyword 'using'. NVM Express, or more commonly - NVMe. Azure File Sync & DFS Namespace. After opening the text editor, you can enter the necessary lines of code. Identify the name that your organization has registered for use on the Internet (for example, company. If you recall, in the previous part to this series ("Data in a. List available classes. An NVMe controller is associated with a single PCI function. js modules use environment variables. • Create NVM and Discovery Subsystems. Several compilers require such types to be fully qualified. The NVMe namespaces mapped to the NVMe subsystem. A physical or virtual clustered Data ONTAP system. Rails Routing from the Outside InThis guide covers the user-facing features of Rails routing. Trivia/ — Same idea as the Quotes but for stuff about the production of a work that aren't tropes in the work. This is sometimes a useful feature, but more often it is the cause of bugs if the two definitions are not. NVMe Compare & Write is a fused atomic Command and used in the same way as SCSI Compare & Write. " I set it to ProgramExample. Atomicity enhancements, live firmware updates, Namespace management, Host and Controller memory buffer, temperature thresholds and pass-through support were introduced in version 1. Calls nvme_setup_io_queues Sets the number of queue as number of CPUS present calls nvme_create_io_queues to create the queues nvme_alloc_queue allocates CQ and SQ for each CPU(Same as done for the admin queue). You can use System Manager to create one or more NVMe namespaces and connect each to a host or set of hosts in a storage virtual machine (SVM). As like the pci devices, this table has Vendor and device ID this driver would support. Many programming languages use namespaces or contexts for identifiers. The metadata is yet another instance of a class. 0, Example 42 (ODBC, OCI: LONG ==> CLOB. The syntax for accessing the member of namespace is, Namespace-Name. All servers should have the same number of drives of each type. py from django. Net has a root namespace, which is set in the Property page of the project. You can also change, add and delete additional namespaces and prefixes after you create the label, if needed (although changing a prefix after you've added. However, processes in the parent namespace have a complete view of processes in the child namespace, as if they were any other process in the parent namespace. Edit Enables you to edit the namespace mapping. Examples Creating an NVMe namespace. /* ---[ Cheat sheet for Rust namespaces ]--- */ Rust namespaces can be a little mind-bending. Setup steps. NVMe enables deployments with hundreds or thousands of SSDs using a network interconnect, such as RDMA over Ethernet. 2 NVMe SSD disk now. The NVMe specification is developed by the NVM Express Workgroup. 3 introduces a Namespace Optimal IO Boundary field that provides exactly this performance hint to the host system, expressed as a multiple of the sector size (eg. A programmer can insert the using directive to bypass namespace resolution requirements and obtain backwards compatibility with older code that expects all identifiers to be in the. This was on Server 2012R2 - the unmapdomroot option seems to be equivalent to the /unmapftroot option in the old (pre 2008) version of dfsutil. How to create. A qualified name is a tag or attribute name that is associated with a given namespace. By continuing to use this site you agree to our Cookie Policy. Each namespace consists of a number of Logical Block Addresses (LBAs). For NVMe, the SCSI LUN ID is irrelevant and instead the system assigns the NSID that cannot be changed. 3 introduces a Namespace Optimal IO Boundary field that provides exactly this performance hint to the host system, expressed as a multiple of the sector size (eg. In this example, based off of the previous one, the Get Features request is sent to an NVMe drive. Before sending these commands, user applications need to query the associated Namespace ID, which can be retrieved via an IOCTL call with code called NVME_GET_NAMESPACE_ID. Consider the following items: Identify the DNS namespace that you will be using for your domain. The parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1). This post shows how to configure NVMe over Fabrics (NVMe-oF) target offload for Linux OS using ConnectX-5 (or later) adapter. nvme - the dumb pci-e storage utility SYNOPSIS nvme [] DESCRIPTION NVM-Express is a fast, scalable host controller interface designed to address the needs for PCI Express based solid state drives. OOP Concepts in C#: Code Examples and How to Create a Class Stackify August 8, 2017 Developer Tips, Tricks & Resources Object oriented programming (OOP) is a programming structure where programs are organized around objects as opposed to action and logic. The XML Namespace specification adds qualified names to XML. In the second one, change the namespace to. 0 of the Linux kernel brought with it many wonderful features, one of which was the introduction of NVMe over Fabrics (NVMeoF) across native TCP. It is possible to create a nested set of child namespaces: one process starts a child process in a new PID namespace, and that child process spawns yet another process in a new PID. For example, you may wish to create a controller that handles all HTTP requests for "photos" stored by your application. This document is intended for developer and software companies, it should be noted that kernel 3. He reveals what they are and how they work, and throws in a few handy tips along the way. This indicates a namespace of 'admin', and a named URL of 'index'. This way the global scope can be divided in "sub-scopes", each one with its own name. SPDK together with the NVMe over Fabrics specification extends the benefits of NVMe to large fabrics which are beyond the reach and scalability of PCIe. Note that we must embed some base Kubernetes metadata classes. Using FreeBSD 9. For example, do not use Debug for a namespace name and also provide a class named Debug in the same namespace. Collections, System. How to create. It is usually Vendor Specific & is embodied in the NVMe device. For the NVMe device given, sends a namespace management command to create the namespace with the requested settings. list NVMe controllers and their namespaces VMware native NVM Express driver compatible with NVM Express Specification 1. This example will go through the following steps: Setup. Custom MessageEncoder. Western Digital's blog site about all things data with news and insights on systems and technology that help you capture, preserve, access and transform your data. EXAMPLES • Has the program interpret the returned buffer and display the known fields in a human readable format: # nvme id-ns /dev/nvme0n1 • If using the character device or overriding namespace id: # nvme id-ns /dev/nvme0 -n 1 # nvme id-ns /dev/nvme0n1 -n 1 # nvme id-ns /dev/nvme0 --namespace-id=1. VIP for NVM Express 1. If you want to zip files see this page on my site. version added: 1. Example showing how to serialize and deserialize an Menu. Net Web API Service in Asp. NS(NameSpace)はNVMe上の領域を切り分けてそれに名前をつけられる機能。 p. Note: Do not Dim for example FileNameZip as String in the code examples. Use the @XmlSchema annotation on the package to set a default namespace and specify that all elements in the package are qualified with the namespace. One or more namespaces are provisioned and connected to an NVMe host. In order for XML documents to be able to use elements and attributes that have the same name but come from different sources, there must be a way to differentiate between the markup elements that come from the different sources. Intel® Solid State Drive Data Center Tool User Guide August 2019 2 331961-020US Intel may make changes to specifications and product descriptions at any time, without notice. The host-model mode is essentially a shortcut to copying host CPU definition from capabilities XML into domain XML. The capacity of NVMe SSD becomes larger than larger up to 3. The parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1). Using NamespaceManager. For example, a host with a single NVME drive containing one namespace with three partitions appears as follows:. 1010 or later. Using nvmeadm to Configure an NVM Express Device; nvmeadm Command Overview; List NVMe Controllers; List NVMe Namespaces; List the Supported LBA Format; List NVMe Controller Log Pages ; List NVMe Features of the Controller; Format All Namespaces on the Controller; Erase All Namespaces; Offline a Namespace; Online a Namespace; Export an SSD Disk. For this example, the Write Amplification Factor (WAF) is 16185227 / 6405605 = 2. We can also organize classes using the Namespace keyword. In this post, we are going to talk about HBase namespace commands, HBase create namespace and HBase namespace examples. The first two classes use custom namespaces—Perls and Ruby. The Linux NVMe driver is natively included in the kernel since version 3. home; services. In a simple C# program, we use System. Create (Use) Asp. Creating URL namespaces in Django Raw. The command I used to delete a rogue namespace server was: dfsutil diag unmapdomroot \\mydomain. Attala Systems makes its FPGA-based storage hardware available and capable of 'unshackling' NVMe over RoCE from the limitations of one server rack. net is provisioned automatically. This way your files are accessible both locally at your file server and publicly at Azure Files using an SMB 3. Namespaces can be a good way to structure your code in a Web Application, with all dependencies included as tags in your HTML page. For the NVMe device given, sends an nvme namespace management command to delete the requested namespace and provides the result. Given a generated class org. into multiple namespaces (for example: dev and prod). 0, PHP 7) Although any valid PHP code can be contained within a namespace, only the following types of code are affected by namespaces: classes (including abstracts and traits), interfaces, functions and constants. Workaround Use the "--no-autorelabel" option while creating or modifying the namespace. Copy the following bash script, and then save it to your instance (for example, mem. ] The first thing we do in the code is create a new SyndicationFeed object and set properties on the feed itself. When you create a mapping to an NVMe volume, the NSID is returned (The NSID is the vdisk_ID + 1). Java Code Examples for javax. Namespaces Namespaces allow to group entities like classes, objects and functions under a name. You can have HBase create a namespace in the HBase create table and then create multiple HBase tables in that HBase namespace. Returns xpathResult, which is an XPathResult object of the type specified in the resultType parameter. To list an NVMe namespace, type: nvmeadm namespace [-n] [namespace] [-v] [controller_name] For example: To list namespaces on all NVMe controllers: nvmeadm namespace. 1 of the specification was released on 11 10 2012. list NVMe controllers and their namespaces VMware native NVM Express driver compatible with NVM Express Specification 1. The above one is the safest way to create namespace, but what we can do is we can make it more easy by writing a function which will create our namespace. NET MVC is a powerful component, which allows you to visualize and edit data via its table representation. The definitions for it were kind of vague: "An NVMe namespace is a quantity of non-volatile memory (NVM) that can be formatted into logical blocks. We encourage the reader to have copies of the papers [2,. You'd use this command: ip netns add blue To verify that the network namespace has been created, use this command:. js Working with environment variables is a great way to configure different aspects of your Node. A remote NVMe block device exported via an NVMe over Fabrics network using TCP. The XPathResult Interface is defined here. Net MVC Application with Example ASP. When these routes are created, the “Namespaces” data token is specified on the route, just like what is done in MVC, however in WebApi that needs to be done manually. They don't add a performance penalty, and in many cases can actually improve performance as the Kubernetes API will have a smaller set of objects to work with. System is the basic namespace used by every. For example, if we need to create an object of MyClass, it can be done as, MyNamespace. " - Hal Varian, Chief Economist at Google. 1010 or later. Namespaces Namespaces allow to group entities like classes, objects and functions under a name. Create an LdapModification object for each of the attributes to be modified using an attribute with a new value (in case of add/replace) and the modification type, for example, add, replace or delete. This was on Server 2012R2 - the unmapdomroot option seems to be equivalent to the /unmapftroot option in the old (pre 2008) version of dfsutil. How to: Create a Custom Behavior The DevExpress. Each module creates its own global namespace. Create or edit an existing task sequence:. Below is an example showing two elements nested within a XPath expression. NET Core apps, you can't use any of the abstractions found in the hosting abstraction. Here an example of how to use the Path annotation to create nested elements and attributes using a single annotated class. exe command (In Visu. Of course, this wasn’t usually a problem for people, and even when you did need to dynamically create a namespace node, there were workarounds using an extension function, as we’ll see. You can use System Manager to create one or more NVMe namespaces and connect each to a host or set of hosts in a storage virtual machine (SVM). HBase organizes all data into tables. One or more namespaces may be created within an NVM Set and those namespaces inherit the attributes of the NVM Set. 1 of the specification was released on 11 10 2012. The parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1). Here is an example to create "Books" namespace in VB. NVM Express Explained Why NVM Express? There is an increasing gap in the price/performance of DRAM and hard drives, as shown in Figure 1. Names in this namespace should be used only as defined in the relevant version of the XSLT Recommendation. The parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1). Namespaces Namespaces allow to group entities like classes, objects and functions under a name. A namespace defines a contiguously addressed range of non-volatile memory conceptually similar to a hard disk partition, SCSI logical unit (LUN), or an NVM Express* namespace. Yet another example is the directory structure of file systems. into multiple namespaces (for example: dev and prod). NVMe devices should show up under /dev/nvme*. For example, if one server has NVMe, they should all have NVMe. NET Web API is an ideal platform for building Restful applications on the. Threading, etc. Vars can be interned in a namespace, using def or any of its variants, in which case they have a simple symbol for a name and a reference to their containing namespace, and the namespace maps that symbol to the same var. NVMe access through SPDK as an unprivileged user can be enabled by running the example command sudo daos_server storage prepare --nvme-only -p 4096 -u bob. list-ns Send NVMe Identify List, display structure. Now we can state the graph with fully qualified URIs. Create a standard Package in your console, specify source folder containing the. This way the global scope can be divided in "sub-scopes", each one with its own name. The library implements all logic required to create an NVMe-oF target application. Packages are special folders that can contain class folders, function, and class definition files, and other packages. Edit Enables you to edit the namespace mapping. For example: • Creating namespace—#ndctl create-namespace -r region0 -m raw -f --no-autolabel. User-defined types are collections of data, which describe an object's attributes and state. For example, if one server has NVMe, they should all have NVMe. NVM subsystem statistics, sanitize command, Streaming and Attribute Pools will be part of NVMe version 1. For NVMe, the SCSI LUN ID is irrelevant and instead the system assigns the NSID that cannot be changed. A namespace can be created via the Namespace keyword. For the NVMe device given, sends a namespace management command to create: the namespace with the requested settings. QEMU fork which can emulates NVMe device with most of the features supported, including SMART log pages, namespaces, etc. Create an LdapModification object for each of the attributes to be modified using an attribute with a new value (in case of add/replace) and the modification type, for example, add, replace or delete. Laravel resource routing assigns the typical "CRUD" routes to a controller with a single line of code. How to use OTL namespaces) Example 42 (ODBC, OCI: TEXT ==> CLOB. id-ns Send NVMe Identify Namespace, display structure. py from django. Namespaces in C++ - Consider a situation, when we have two persons with the same name, Zara, in the same class. If you choose not to use an XML Data Binding tool, you may be advised to refer to the XSD standard and invest in a good book regarding XML Schema. FW version should be 16. One or more namespaces are provisioned and connected to an NVMe host. The Telerik Grid for ASP. 2 NVMe SSD disk now. On success, the namespace: identifier assigned by the controller is returned. The networking specialist in July plans to broaden its hyper-converged infrastructure (HCI) options with Cisco HyperFlex All NVMe. The next 2 sections will explain how to create Namespaces. By default tables will be created in HBase ‘default’ namespace. You don't need to use vendor-specific tools (like isdct). NVMe controller to create namespace on. If you recall, in the previous part to this series ("Data in a. Using the make:controller Artisan command, we can quickly create such a controller:. Create a class with dotnet core and roslyn with using statements outside the namespace - Roslyn. On success, the namespace identifier assigned by the controller is returned. json in one of these folders or in any of their subfolders. overview development training. A namespace is the categorisation which objects are identified (and hence typically will need unique naming). If you are working with a schema that makes use of namespaces then XML Data Binding will save you a great deal of. Everything that allows you to create a named object that returns a kernel handle is interacting with the kernel object namespace in some form or another, and many Win32 APIs internally use the object namespace under the hood. Here, we will add an XML namespace declaration and description in both the employee data XML document and section data XML document. In Tcl when this occurs the old procedure or variable is simply overwritten. NET Code: Namespace Books. getUserId(), which returns a unique, permanent ID for the user. " - Hal Varian, Chief Economist at Google. When using prefixes in XML, a namespace for the prefix must be defined. Device drivers can also be identified with "#esxcli network nic list" or "#esxcli storage core adapter list", but the new command displays all devices at a glance. Tuesday, March 11, 2008 1:06 PM. Create an attribute node using createAttribute This example uses createAttribute() to create a new attribute node, and setAttributeNode() to insert it to an element. Create it with the following sequence of operations: open the Repository dialog using File | New | Other menu, then select the ActiveX tab and click the ActiveX Library icon. This should be updated to match the project name created. XAML stands for Extensible Application Markup Language. The namespace can be defined by an xmlns attribute in the start tag of an element. Before discussing the use of namespaces, it is important to understand how PHP knows which namespaced element your code is requesting. ns-descs Send NVMe Namespace Descriptor List, display ↪structure create-ns Creates a namespace with the provided parameters delete-ns Deletes a namespace from the controller attach-ns Attaches a namespace to requested controller(s) detach-ns Detaches a namespace from requested controller(s). NVM Express, or more commonly - NVMe. Execute make doc to generate the documentation. In the example UI you can see the XPath query Textbox on the top but underneath it a table of all the namespaces the user wants to include in his query. No namespace exists when there is no default namespace in scope. Controller, Namespace, ) to manage NVMe resources in the scripts, like this: # create an NVMe controller with its PCIe address nvme0=d. Linux NVMe support. 00 rows per sec. uname -n myoldhostname unshare -u /bin/bash This create a UTS namespace by unshare() syscall and call execvp() for invoking bash. After creating the file, you must save it. NVMe/FC is more mature than other NVMe-oF options, with the largest ecosystem now in the NVMe-oF universe. If you recall, in the previous part to this series ("Data in a. Here is an example to create "Books" namespace in VB. Sample userworld. Starting from kernel 2. 2 or later, you can run the nvme id-ctrl command as follows to map an NVMe device to a volume ID. In NVMe, namespace is an important concept. As we know, default namespace is / (root). NVM Queue Architecture (Source: NVM Express Org). In your example there are no new declaration - so no difference hence no preferred way. The following example gets the volume ID and device name. Namespaces In most programming languages we know the concept of** namespaces (or packages)**. Q&A for peer programmer code reviews. To find the righ class, it can useful to list all or search. later on, If I use this open source on nvme specification 1. The Form Controls toolbar contains tools that you need to create an interactive form. That means if you have common library code you wanted to share between your HTTP and non-HTTP ASP. The last OOP topic we'll look at in this chapter is how to create your own namespaces. Here, we will add an XML namespace declaration and description in both the employee data XML document and section data XML document. In NVMe, namespace is an important concept. Names in this namespace should be used only as defined in the relevant version of the XSLT Recommendation. If you are creating and modifying XML documents validating against XML Schema making use of namespaces, then XML Data Binding will save you a great deal of time as mostly removes this complexity. There is another advantage of D3700 / D3600 series over current single port SSDs. Public DNS and HTTP namespaces only. The format of namespaces is: namespace identifier {entities}. [SideNote: You'll probably need the other standard namespaces, too, but I left them out for simplicity. Create an LdapModification object for each of the attributes to be modified using an attribute with a new value (in case of add/replace) and the modification type, for example, add, replace or delete. Part 1: Jump into the fire© Benchmarking Samsung NVMe SSD 960 EVO M. > * nvme-pci driver is modified to expose raw interface of attaching to. Qualifying at the Package Level. The namespace can be defined by an xmlns attribute in the start tag of an element. You can vote up the examples you like and your votes will be used in our system to generate more good examples. In Tcl when this occurs the old procedure or variable is simply overwritten. These different namespaces are isolated. 172 6 NVM Command Set Read / Write / Flush. Namespace. Words is written completely in C#, CLS compliant and contains only safe managed code. XAML stands for Extensible Application Markup Language. Q: FC-NVMe is the name of the spec that defines the NVMe protocol over the Fibre Channel fabric. Net MVC Application with Example ASP. You can create elements, attributes, and documents that don't use namespaces at all. Performance Sector size. 30 of lsscsi added support for listing NVMe devices (namespaces) and controllers. Namespace option 3 - Namespace reversing the original tree structure on each file server Last but not least, the most interesting exhibit of the flexibility of DFS-N. C# Namespaces. Andy Rudoff, Intel June 30, 2016. Workaround Use the "--no-autorelabel" option while creating or modifying the namespace. A namespace usually represents some kind of application domain, such as hypertext, graphics, resource descriptions, or type information. xmlns:prefix="URI". When you pass the namespace URI to the children method, you get a SimpleXML collection of the child elements belonging to that namespace. NVMe namespaces window - docs. For example, the main index page of the admin application is referenced using 'admin:index'. There are lots of Do or Do'not detail on MSDN regarding Naming of namespace, Assemblies etc. You can edit this Network Diagram using Creately diagramming tool and include in your report/presentation/website. The current documentation says "dynamic namespace management" which I understand is the possibility to add multiple namespaces and manage them. Just like with the internal namespace, the objects in the external namespace for modules and classes are exposed through attribute access. An organisation wanted to deploy each application into a separate Kubernetes namespace. Also, a complete table is given for namespace identification. The format of namespaces is: namespace identifier {entities}. How to Create a Cloud File Server – LucidLink Briefing Note Posted on October 29, 2019 by George Crump — Leave a comment Most enterprises have invested in several, if not dozens of file servers or network-attached storage (NAS) systems to distribute and share data. The global namespace holds all global variables and commands. What's the big deal about namespaces? As Ian explains, they're critical to the functioning of XML. 31 This example: OS sees two drives! NS A = Disk 0! NS B = Disk 1! Logical partitions on A and B NVMe Controller B. Public DNS and HTTP namespaces only. Adding and deleting a single namespace doesn't "enable more users and scale deployment". com\namespace \\servername\namespace. For example, System. A namespace definition begins with the keyword namespace followed by the namespace name as follows: namespace namespace_name { int x, y; // code declarations where // x and y are declared in // namespace_name's scope } Namespace declarations appear only at global scope. However, understanding namespaces is vital if you plan to submit your package to CRAN. Attala Systems makes its FPGA-based storage hardware available and capable of 'unshackling' NVMe over RoCE from the limitations of one server rack. metadata = client. a server component rather than a client component). It's a fairly advanced topic, and by-and-large, not that important if you're only developing packages for yourself. This ratio is measured in writes to NAND and writes to HOST. Create Namespaces - Note: FLBA Size (logical block size) will vary from device to device, check available formats a. Timeline/ — When a work has a very confusing timeline, you might want to create a subpage describing it all. In real-world scenarios, one can create namespace for development (dev), testing (QA) and production (prod) environment. NET for a Color object, you find two. NVM Set B. Namespaces can also be nested. A physical or virtual clustered Data ONTAP system. In the example below, we bind the frontend. The namespace declaration has the following syntax. Just use this command: ip netns add For example, let's say you wanted to create a namespace called "blue". The examples below use the XML file books. This time we focus on a series of related changes to supporting the NVMe specification , which "defines an optimized register interface, command set and feature set for PCI Express (PCIe®)-based. NET Web API is an ideal platform for building Restful applications on the. These examples are extracted from open source projects. The objects in dev/QA namespace such as pods, services, and deployments will be available for developers/testers respectively to build and run the applications. Namespaces are declared using the namespace keyword. When Visual Studio generates your projects, it automatically puts your classes in a namespace. If the namespace you choose already exists on the Internet, it may cause name resolution problems for internal clients. Creating Namespaces Don't be afraid to create namespaces. The following code prepares the query data structure and then sends the command down to the device via DeviceIoControl. Hi, Introducing nvme-cli based unit test framework. Defining namespaces (PHP 5 >= 5. In a simple C# program, we use System. The parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1). Namespaces described by this specification can be either Persistent Memory namespaces or Block Mode namespaces. This would still be under your root namespace or another namespace if they are part of a larger project. This tutorial explains C# FileStream class with complete programming example. This means you may have naming conflicts if you (or another library you are using) decide to create another function with the same name. Creating namespaces on a per user basis. That means if you have common library code you wanted to share between your HTTP and non-HTTP ASP. ns-descs Send NVMe Namespace Descriptor List, display ↪structure create-ns Creates a namespace with the provided parameters delete-ns Deletes a namespace from the controller attach-ns Attaches a namespace to requested controller(s) detach-ns Detaches a namespace from requested controller(s). A namespace defines a contiguously addressed range of non-volatile memory conceptually similar to a hard disk partition, SCSI logical unit (LUN), or an NVM Express* namespace. Each namespace is independent of other namespaces in the subsystem. Multiple WebApi controllers with the same name but different namespaces. How to use OTL namespaces) This example demonstrates how to use more than one instance of the OTL library. There are lots of Do or Do'not detail on MSDN regarding Naming of namespace, Assemblies etc. User Guide SAMSUNG PROPRIETARY. For NVMe, the four tuple shown in lsscsi output (and used by the filter argument) is the letter 'N' in the first position, followed by the NVMe controller's Linux char device's minor number as seen typically in NVMe controller device names (e.