Gpfs t erminology 12 5 cluster this consists of a number of nodes and network shared disks nsds for management purposes. It can be deployed in shareddisk or sharednothing distributed parallel modes. For specific filenames, check the readme for the gpfs update by clicking the view link for the update on the download tab. Ibm spectrum scale allows hadoop applications to access data on centralized or local storage. Gpfs nsd nsd1 nsd2 nsd3 nsd4 nsd12 o o o lun logical unit abstraction of a disk. Identify the disks by the nsd names that were given to them by the mmcrnsd.
Gpfs best practices if you can do it, it aint braggin. 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. It can be deployed in shareddisk or sharednothing distributed parallel modes, or a combination of these. Two nsd disk has been defined, their name are mynsd1 and mynsd2 and the device files of these disks are respectively devsdb and devsdc. A gpfs file system must also be created and mounted on these nodes before starting the cindervolume service.
Gpfs has been through many changes, including a name change to ibm spectrum scale. All statements regarding ibms future direction and intent are subject to change or withdrawal without notice, and represent goals and objectives only. Node this is an individual os instance within a cluster. All io is protected by token management, which ensures that the file system on multiple nodes honors the atomicity and provides data consistency for a file system. For more detailed and comprehensive, do look at gpfs. This includes readahead for sequential reads, and writebehind for all writes not specified as synchronous. Use of disk storage and file structure within a gpfs file system. Prevent root in linux from changing folder permissions in gpfs filessystem. Gpfsadding node,deleting node,adding disk,deleting disk.
Gpfs, the general parallel file system with a brand name ibm spectrum scale is highperformance clustered file system software developed by ibm. Ibm spectrum scale fundamentals workshop for americas part 1. Changing physical disk storage in ibm db2 purescale. It is one of the best place for finding expanded names. Change the perms on their source tree so that you can build as a nonroot user. Add new node to existing gpfs cluster use mmaddnode command to add new node to gpfs cluster make sure all the nodes available when above command issued after new node added to the cluster you must use mmchlicence command to designate the licence to the new node example. Check and make sure the nsd nodes you are removing are not quorummanager. These nodes are required for configuration changes only. Here is steps to change the ip addresses on the nodes in the cluster a stop any applications that are using gpfs b shutdown gpfs on all nodes using the mmshutdown a command c check the etchosts or the name resolution utility to make sure that the first ip address the hostnames are resolving. Utilities for performing various and sundry gpfs maintenance or monitoring tasks davidrgpfs utils.
Visit to know long meaning of gpfs acronym and abbreviations. Follow the installation and migration instructions in your gpfs concepts, planning and installation guide. Instead of adding additional nsd, i want to increase it from san, then pv, then nsd. In the rare event that such a change becomes necessary or is inadvertently introduced by reinstalling a node with a disk image from a different node for example, follow the steps in this topic.
Gpfs cluster general commands on aix gpfs cluster general commands on aix. Change the remote shell and remote file copy programs to be used by the nodes in the cluster. Copy the gpfs rpms from your distribution media onto the xcat management node mn, following the instructions you received and accepting the product licenses as required. I could bring the dmmp devices under gpfs and i have configured gpfs file systems. Configured lvm with the available san luns from netapp storage. Gpfs rebalancing always happens when disks are removed because the data on the disk should be moved on to the remaining disks on the file system see figure 4. Concepts, planning, and installation guide and gpfs. So my question is how do you map two different devices names to the same nsd device name from two different nodes. Spectrum scale stripes files across nsd servers and nsds in. Monitor the progress of removing a disk changing the gpfs tiebreaker disk when you change the gpfs tiebreaker disk, db2 purescale must be in maintenance mode.
Changing your nsd configuration ibm knowledge center. File system disk name nsd servers sambagpfs test01 sambagpfs1,sambagpfs2 sambagpfs test02 sambagpfs2,sambagpfs1 we only have 2 nods in our gpfs cluster so we need to set a tie breaker disk. The process known as wnsd or ibm lotus notesdomino belongs to software ibm wnsd or ibm notes diagnostics or projectopen or ibm lotus notesdomino by ibm. 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. No volume groups andor logical volumes are created in this gpfs version.
Building a twonode ibm gpfs cluster on ibm aixplease read the article building a twonode ibm gpfs cluster on ibm aix more on unixmantra. It highlights key milestones in the product history, usage, and industry to convey that spectrum scale may have started as gpfs, but it. Can move data between pools, changes replication, delete data,or run arbitrary user commands. To move a disk from one storage pool to another, use the mmdeldisk and mmadddisk commands. Storage pool this groups a file systems storage and allows a user to partition storage based on characteristics such as performance, locality and reliability. 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. As with mmadddisk, you can also specify that the file system should be restriped by using the r and a options to perform the restripe in the background. How to ibm gpfs general parallel file system unix addiction. Spectrum scale stripes files across nsd servers and nsds in units of. Building a twonode ibm gpfs cluster on ibm aix ibm. Ha two node gpfs cluster with tiebreaker disk sysadmin. The mmchdisk command does not change the name of the nsd, the nsd.
The general parallel file system gpfs is a highperformance clustered file system developed by ibm. The disk used by gpfs are called network shared disk nsd using gpfs terminology. Gpfs assumes that ip addresses and host names remain constant. Download general parallel file system gpfs for free. The mmlsmount command displays the ip addresses and names of the nodes local and remote. Removal is accomplished with the gpfs mmdeldisk command, passing the file system name and disk nsd you want to delete.
If a node that is to be deleted is an nsd server for one or more disks, move the disks to nodes that will remain in the cluster. A node that is being deleted cannot be designated as an nsd server for any disk in the gpfs cluster, unless you intend to delete the entire cluster. It is used by many of the worlds largest commercial companies, as well as some of the supercomputers on the top 500 list. Highlycustomizable ansible role for installing and configuring ibm spectrum scale gpfs particularly looking for feedback and future requirements features. View three pieces of content articles, solutions, posts, and videos. The details of these gpfs specific steps are covered in gpfs. Ibm gpfs cluster installation and configuration in ibm aix. Basic installing and configuring of gpfs cluster part 1. Implementing a simple spectrum scalegpfs single node cluster. Gpfs general parallel file system the general parallel file system gpfs is a highperformance shareddisk clustered file system. The following sections summarize changes to the gpfs licensed program. For more information about creating nsds, see the ibm spectrum scale.
These commands must adhere to the syntax forms of the ssh and scp commands, but may implement an alternate authentication mechanism enable or disable the cluster configuration repository ccr. Prevent root in linux from changing folder permissions in. Currently utilized for general cluster file system kernel patches for linux which do not yet appear in a gnulinux distribution. Building a twonode ibm gpfs cluster on ibm aix unixmantra.
My current nsd is 5 gb testfs1, and have a requirement to increase it till 20 gb. This article is intended for ibm aix system administrators, file system developers and testers for installing and configuring the ibm general parallel file system ibm gpfs high availability cluster node for environments such as aix clusters, linux clusters, microsoft windows server, or heterogeneous cluster for aix, linux, and windows nodes. Gpfs commands to create nsds, filesystems, add and delete. Removing existing nsd nodes from the gpfs cluster is not difficult, but there are several steps to take note of. Basic installing and configuring of gpfs cluster part 1 this tutorial is a brief writeup of setting up the general parallel fils system gpfs networked shared disk nsd. Connect the nsd to the new nodes prior to issuing the mmchnsd command. No change in fs will be seen but it will allow gpfs to grow file size as needed.
Use the mmchcluster command to do the following tasks change the name of the cluster. The gpfs daemon performs all io and buffer management for gpfs. If a spectrum scale cluster with an ess in the same cluster. If you choose to install gpfs on ubuntu, it is important for you to understand that your. We have specified that ssh and scp will be used for cluster communication and administration. Gpfs general parallel file system list, config, stop. Gpfs software must be installed and running on nodes where block storage and compute services are running in the openstack environment. Dear all for the last few days i was searching in ibm web site for gpfs 3. The ibm general parallel file system gpfs is a high performance clustered network filesystem. 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. 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. To set up gpfs in a stateful cluster, follow these steps. Use the mmchdisk command to change these attributes. It is bundled with oracles unbreakable enterprise kernel it is a very old software product.
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