Add the new nsd to the fs1 file system using the mmadddisk command. Network performance assessment using the spectrum scale. Check and up nsd disk in gpfs on aix network administration. The process of mapping a device interface to an nsd involves gpfs opening each device in turn and reading any nsd volume identifier potentially recorded at sector two of the disk. Although this is a cluster of one, it can be easily extended to add additional servers and clients. The nsd had been successfully deleted from the gpfs cluster but there was a failure to clear the unique volume id from the disk. Implementing the ibm general parallel file system gpfs in a crossplatform environment dino quintero matteo barzaghi randy brewster wan hee kim steve normann paulo queiroz robert simon andrei vlad describes features, use cases, and implementation scenarios of gpfs v3. Further information on gpfs is available in the docs documentation manager section. General parallel file system administration and programming reference version 3. Sector 1 contains the fs unique id which is assigned when the nsd disk assigned to a file system. I have a high volume high transaction sybase hacmp cluster. Node this is an individual os instance within a cluster.
Dec 25, 2011 now i will add the nsd disks to the cluster. I could bring the dmmp devices under gpfs and i have configured gpfs file systems. A unique nsd volume id to identify each disk as an nsd has been written to the disk. Gpfs general parallel file system list, config, stop. I will build the initial cluster using 2 shared san disks connected to two. Before restarting the nsd nodes or quorum manager nodes or other critical nodes, do check the following first to ensure the file system is in the right order before restarting. In this section, we outline the procedures for working with disks. You can view or download the tsm documentation at the ibm tivoli storage. Aix clusters concepts, planning, and installation guide describes. A recommended gpfs pool configuration has two storage pools, a system pool for metadata only and a data pool. Aug 10, 2015 download general parallel file system gpfs for free. This is a slow operation and its usage is suggested for problem determination only.
How to ibm gpfs general parallel file system unix addiction. This gpfs operation is done without locking the disks that make up the volume group using the varyonvg command with the u flag. Gpfs how to remove nsd from a device need to removed nsd from the device. Gpfs commands to create nsds, filesystems, add and delete. Ibm general parellel file system gpfs ibm systems software. Adding a disk to gpfs filesystem dynamicallyplease read the article adding a disk to gpfs filesystem dynamically more on unixmantra. This id is matched in the filesystem descriptor fsdesc to a gpfs disk names. Use of disk storage and file structure within a gpfs file system. Upgrading gpfs may be accomplished by either upgrading one node in the cluster at a time or by upgrading all nodes in the cluster at once. It can be deployed in shareddisk or sharednothing distributed parallel modes, or a combination of these. File system disk name nsd volume id nsd serversfree disk gpfs1nsd 000000004aaf8496 c149 free disk gpfs2nsd 000000004aaf8497 c149 free disk gpfs3nsd 000000004aaf8496 c152. Ibm spectrum scale fundamentals workshop for americas part 1.
Hello, i first apologize for the possibly trivial question, but im a still a newbye. This edition applies to ibm spectrum scale formerly gpfs v4. Storage virtualization with npiv on ibm system p and ibm system storage ds5300 this paper describes a proof of concept in which we have put these individual components together to implement a scalable gpfs infrastructure in a virtualized environment. Gpfs disk descriptor general parallel file system gpfs forum. To remove the unique nsd volume id left on a disk after the failure of a previous invocation of the mmdelnsd command. Hi, can i increase gpfs nsd size or gpfs based filesystem dynamically, same as we increase jfs2 vg and fs dynamically with the help of chvg g testvg and then increase fs size. Gpfs general parallel file system list, config, stop, start. Displays network shared disk nsd information for the gpfs cluster. Sector 2 has the nsd id in it which gpfs can match with a gpfs disk name in the varmmfsgenmmsdrfs file. Jul 03, 2017 introduction ibm spectrum scale, based on technology from ibm general parallel file system hereinafter referred to as ibm spectrum scale or gpfs, is a high performance software defined file management solution that simplifies data management, scalable to petabytes of data and billion of files, and delivers high performance access to data from multiple servers. Sector 1 has a fs unique id which is assigned when the nsd disk is part of a filesystem. For this installation there will be one aix node that acts as the scale system as well as the samba server. Quorum is defined as one plus half of the explicitly defined quorum nodes in the gpfs cluster.
Gpfs aix clusters concepts, planning, and installation guide. This id is matched in the file system descriptor fsdesc to a gpfs disk name. Convenience method to return only those nsds which are not allocated to a filesystem. Gpfs how to remove nsd from a device post 302914232 by asyed123 on saturday 23rd of august 2014 11. Displaying disks in a gpfs cluster ibm knowledge center.
All of the nsd commands mmcrnsd, mmlsnsd, and mmdelnsd use this unique nsd volume id to identify and process nsds. This document describes how to migrate a gpfs filesystem from two luns nsds to other two luns online. Gpfs general parallel file system the general parallel file system gpfs is a highperformance shareddisk clustered file system. My current nsd is 5 gb testfs1, and have a requirement to increase it till 20 gb. Instead of adding additional nsd, i want to increase it from san, then pv, then nsd. Gpfs provides a true shared file system capability, with excellent performance and scalability. The intent is to migrate several 20tb jfs2 filesystems into scale to provide a single highperforming namespace and the allow users to update the files using samba from their desktops. General parallel file system administration and programming reference. Enabling a view of distributed data with a single global namespace across platforms, gpfs is. It is bundled with oracles unbreakable enterprise kernel it is a very old software product.
The x option also displays extended information for the nsd volume id and. Home aix how to ibm gpfs general parallel file system. Gpfs troubleshooting apr 2017 spectrum scale gpfs user. Ssh can be configured instead of the default rsh via mmchcluster. There are no default quorum nodes, you must specify which nodes have this role. Ports 22 ssh and 1191 gpfs must be open between cluster nodes. May 23, 2015 ha two node gpfs cluster with tiebreaker disk may 23, 2015 february 29, 2016 giovannibattistasciortino cluster, linux in a previous post i described how configure a gpfs cluster filesystem a filesystem that can be mounted by two or more servers simultaneously. Currently utilized for general cluster file system kernel patches for linux which do not yet appear in a gnulinux distribution. Gpfs allows concurrent access for a group of computers to a common set of file data over a common storage area network san infrastructure, a network, or a mix of connection types. When upgrading gpfs one node at a time, the below steps are performed on each node in the cluster in a sequential manner. Node quorum is the default quorum algorithm for gpfs.
Gpfs filesystems live migration into new nsd disks file. I have a high volume high transaction sybase hacmp cluster currently setup with srdf to the dr datacentre. Introduction the general parallel file system gpfs is a highperformance clustered file system developed by ibm. Storage pool this groups a file systems storage and allows a user to partition storage based on characteristics such as performance, locality and reliability. After the nsds are created, the gpfs cluster data is updated and they are available for use by gpfs. It is a product of ibm and is short for general parallel file system. You can search all wikis, start a wiki, and view the wikis you own, the wikis you interact with as an editor or reader, and the wikis you follow. The ibm general parallel file system gpfs is a high performance clustered network filesystem. One of the features of this new architecture is the addition of separate queues for small and large io operations. The id is written when one of the gpfs commands mmcrfs, mmadddisk, or mmrpldisk are run.
Introduction ibm spectrum scale, based on technology from ibm general parallel file system hereinafter referred to as ibm spectrum scale or gpfs, is a high performance software defined file management solution that simplifies data management, scalable to petabytes of data and billion of files, and delivers high performance access to data from multiple servers. Hpc technical architect deep computing 26 oct 09 version 1. Map the nsd name to its disk device name in dev on the local node and, if applicable, on the nsd server nodes, showing the information with extended information in the nsd volume id and the remarks fields. Nov 30, 2015 ibm general parallel file system ibm gpfs is a file system used to distribute and manage data across multiple servers, and is implemented in many highperformance computing and largescale storage environments. To identify that a disk has been processed by the mmcrnsd command, a unique nsd volume id is written on sector 2 of the disk. Gpfs scalable topology high performance io and nsds. Nsd configuration33 changing nsd server usage and failback34 chapter 5. Ibm spectrum scale fundamentals workshop for americas part.
It highlights key milestones in the product history, usage, and industry to convey that spectrum scale may have started as gpfs, but it. Gpfs general parallel file system the general parallel file system gpfs. Gpfs t erminology 12 5 cluster this consists of a number of nodes and network shared disks nsds for management purposes. For specific filenames, check the readme for the gpfs update by clicking the view link for the update on the download tab.
Verify that stopping each particular machine does not cause quorum to be lost or that an nsd. Jul 23, 2011 purchase licenses for use of gpfs from ibm. It is described as a parallel file system because gpfs data is broken into blocks and striped across multiple disks in an array, then read in parallel when data is accessed. The nsd had been successfully deleted from the gpfs cluster but there was a failure to clear sector 2 of the disk. Extreme data integrity use endtoend checksums and version numbers to detect, locate and correct silent disk corruption physical disk gpfs parallel file system gpfs native raid application physical disk. Dear all for the last few days i was searching in ibm web site for gpfs 3. If gpfs discovers that an nsd volume identifier read from a disk device matches the volume identifier recorded with the nsd name in the gpfs configuration database, i.
In our example, username is gpfsadmin and group is gpfs 2. Gpfs administrative scripts to each node in the cluster vary on the volume groups containing the gpfs data at proper times for file system operations. It is a highperformance shareddisk file system that can provide fast data access from all nodes in a homogenous or heterogenous cluster of ibm unix servers running either the aix or. Terminology mm multi media nsd network shared disk. Zoning zoning is the process by which raid sets are assigned to controller ports and hbas gpfs achieves its best performance by. Disk name nsd volume id device node name remarks gpfs1nsd 7f0000024c06fee9 devsdb gpfs. If the nsd volume id is not removed and the disk is again used with gpfs at a later time, you will. Gpfs provides concurrent highspeed file access to the applications executing on multiple nodes of clusters which can be used with aix5l, linux, and windows platforms.
Adding a disk to gpfs filesystem dynamically unixmantra. Gpfs cluster now known as spectra scale file system general commands. Ibm general parallel file system ibm gpfs is a file system used to distribute and manage data across multiple servers, and is implemented in many highperformance computing and largescale storage environments. Gpfs nsd nsd1 nsd2 nsd3 nsd4 nsd12 o o o l1, l2, l3 l4, l5, l6 there are 2 servers per nsd, a primary and backup server.
You can display the disks that belong to your gpfs cluster by issuing the mmlsnsd command. Home gpfs general parallel file system list, config, stop, start and status. Gpfs, the general parallel file system with a brand name ibm spectrum scale is highperformance clustered file system software developed by ibm. Gpfs best practices if you can do it, it aint braggin.
Allow root user to login as gpfsadmin via ssh without prompt for password 3. When creating a gpfs file system you provide a list of raw devices and they are assigned to gpfs as network shared disks nsd. An entry for each new disk is created in the gpfs cluster data. Building a twonode ibm gpfs cluster on ibm aix unixmantra. Use mmlsnsd command to display the nsd information and analyze the cluster details pertaining to. Wikis apply the wisdom of crowds to generating information for users interested in a particular subject. Once a nsd is defined all of the nodes in the gpfs cluster can access the disk, using local disk connection, or using the gpfs nsd network protocol for shipping data over a tcpip or infiniband connection. If gpfs discovers that an nsd volume identifier read from a disk device matches the volume identifier recorded with the nsd name in the gpfs configuration. Overview the ibm general parallel file system gpfs can help enterprise move beyond simply adding storage to optimizing data management gpfs is a highperformance, shareddisk file management solution that can provide faster, more reliable access to a common set of file data. Gpfs server license performs mgmt functions or exports data gpfs management roles. Increasing the gpfs filesystem can be done online, without any kind of disruption to the production environment. Disk name nsd volume id device devtype node name remarks.
Execute mmlsnsd to list the nsd on the gpfs cluster. To create the network shared disks nsd in gpfs, create a disk file to be used as input to the mmcrnsd command. Jul 30, 2015 this is a slow operation and its usage is suggested for problem determination only. Generally gpfs is fairly reliable and the only real failure mode is if one or more of the disks have hardware problems, this will fail the disk and possibly lock up the filesystem pending a fix. Implementing the ibm general parallel file system gpfs.
Higher performance use declustered raid to minimize performance degradation during rebuild 2. Unlike many traditional file systems, gpfs allows disks to be added and removed from the file system, even when it is mounted. I have a gpfs cluster composed by 10 linux nodes, managed by a primary server a, which also act as nsd server for a first stack of disks. Since 1991, the spectrum scale general parallel file system gpfs group at ibm almaden research has spearheaded the architecture, design, and implementation of the it industrys premiere highperformance, big data, clustered parallel file platform.
Adding a disk to gpfs filesystem dynamically adding a disk to gpfs filesystem dynamically. It is used by many of the worlds largest commercial companies, as well as some of the supercomputers on the top 500 list. Gpfs filesystems live migration into new nsd disks free download as pdf file. Ha two node gpfs cluster with tiebreaker disk sysadmin. Apr 25, 2018 the gpfs is a highperformance clustered file system that can be deployed in shareddisk. But i usually use to do it after the business hours, just to be on the safer side offcourse. Implementing a simple spectrum scalegpfs single node cluster. Now i will create a nsd and gpfs file system and mount it. This infographic is the genealogy of ibm spectrum scale, from its birth as a digital media server and hpc research project to its place as a foundational element in the ibm spectrum storage family.
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