| PRIMECLUSTER Global File Services Configuration and Administration Guide 4.1 (Solaris(TM) 10 Operating System) |
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This interface can handle files that exceed 2 gigabytes. For details, see largefile(5) in the "Solaris X Reference Manual Collection".
See Access client.
Access client. Module which operates in the kernel layer (file system layer) on each node sharing GFS Shared File System. An AC communicates with the MDS if a user application operating on the node sends an access request in a system call. File operations are performed using meta-data sent from the MDS and direct access to the real.
ACL is a file security system that specifies file access authority for specific users or groups in addition to the owner and owner group. For details, see setfacl(1) in the "Solaris X Reference Manual Collection".
The file system that made on the shared disk device is exclusive used in active node and the standing node in RMS Cluster.
Area management data includes information on i-nodes, V-data, and file data allocation information. It is stored in the meta-data area.
Disk file unit in which two or more physical disks are grouped as a single virtual disk. By dividing access between two or more physical disks, performance improves and high reliability can be implemented. Ordinarily, two or more access methods, which are called redundant array of inexpensive disks (RAID) levels, are provided. The major RAID levels are RAID 0 (striping), RAID 1 (mirroring), RAID 5 (striping with parity), and RAID 0+1 (striping set mirroring).
See Cluster Foundation.
The set of PRIMECLUSTER modules that provides basic clustering communication services. For details, see "PRIMECLUSTER Cluster Foundation (CF) (Solaris) Configuration and Administration Guide".
The set of private network connections used exclusively for PRIMECLUSTER communications. For details, see "PRIMECLUSTER Cluster Foundation (CF) (Solaris) Configuration and Administration Guide".
The state in which communication with some of the nodes that constitute the cluster has been stopped. For details, see "PRIMECLUSTER Cluster Foundation (CF) (Solaris) Configuration and Administration Guide".
If a block failure on a disk device destroys partition structure information, a copy is available for continued processing of the file system.
The term data refers to file data.
The term data area refers to a file data area.
A data block is the fundamental unit of file allocation.
Direct I/O refers to a mode of data input/output that does not use kernel buffering.
A single cluster system that is configured through PRIMECLUSTER, or a single server (computing machine) that is not belonging to a cluster system
A node state that indicates that the node is unavailable (marked as down). A LEFTCLUSTER node must be marked as DOWN before it can rejoin a cluster. For details, see "PRIMECLUSTER Cluster Foundation (CF) (Solaris) Configuration and Administration Guide".
An extent is a group of contiguous data blocks of the file system that are handled as a single unit. Each extent is defined by its start block and length.
The extent base is a method of managing file system data based on extents.
One of the interfaces using optical fibre cables as transmission media. In a cluster system, a fibre channel is used to connect an array disk and the computer.
File data is the data part of a file.
The file data area in disk partitions contains file data. It is also called data area. The file data area is allocated in the representative partition and the file data partitions.
The file data partition is a partition that consists of a file data area (data area).
The file data partitions are added to an existing file system in order to extend it. The file data partition will be specified in file data allocation attribute information.
File lock is a means for synchronization among processes that concurrently access data in the same file. There are two types of file locks: mandatory locks and advisory locks.
See Global Disk Services.
Software which allows various operations including GFS Shared File System configuration setting and operation management using the Web screen.
Volume management software for protecting data by managing a disk storage device totally within a SAN environment. For details, refer to "PRIMECLUSTER Global Disk Services Configuration and Administration Guide (Solaris(TM) Operating System)."
GLS(Global Link Services) software provides High Reliability of network communications by duplexing network communication paths using redundant NIC(Network Interface Card)s. For details, refer to "PRIMECLUSTER Global Link Services Configuration and Administration Guide (Redundant Line Control Function) (for Solaris(TM) Operating System)."
See Global Link Services.
The i-node contains information on the file locations on the disk, on file sizes, and on the time when the respective files were last. It also includes other information for identification.
The i-node area contains an i-node. It is located in the meta-data area.
A node state that indicates that the node cannot communicate with other nodes in the cluster. That is, the node has left the cluster. The reason for the intermediate LEFTCLUSTER state is to avoid the network partition problem. For details, see "PRIMECLUSTER Cluster Foundation (CF) (Solaris) Configuration and Administration Guide".
A logical disk device that provides the user with a block device interface and a character (raw) device interface as well as a physical slice (disk partition). The user can access data on a physical disk through accessing the logical volume. Logical volumes are classified into single volumes, mirror volumes, stripe volumes, the volumes in concatenation groups, and switch volumes. Logical volumes may be called "volumes". For details, see "PRIMECLUSTER Global Disk Services Configuration and Administration Guide (Solaris(TM) Operating System)"
Required information is managed when employing the GFS Shared File System. Moreover, this is used in order for sfcfrmd daemon to maintain informational adjustment. The following information is included in the management partition.
1. Information on each node that constitutes the GFS Shared File System.
2. Correspondence information on common node of each GFS Shared File System, and shared device.
3. MDS arrangement information on each GFS Shared File System.
See meta-data server.
Same as the node where an MDS.
Same as the meta-data area.
Various types of management data for the file system are collectively referred to as meta-data. Meta-data includes information on free areas, i-nodes, indirect extent blocks, directories and symbolic links.
The meta-data area contains meta-data. It is allocated in the representative partition.
Program that provides integrated management of file system management information (Meta data). The program is running on the primary server or secondary server. Each AC communicates with MDS then operates files based on the Meta data from MDS.
Point that is used to connect a file system on the directory tree.
This condition exists when two or more nodes in a cluster cannot communicate over the interconnect; however, with applications still running, the nodes can continue to read and write to a shared device, compromising data integrity.
A node is a computer system that runs under one operating system.
The node identifier is a universal name that is assigned to each node in the PRIMECLUSTER system. For each node, the node identifier is normally the same as the node name. However, if the node name was assigned to the standby node such as in hot standby mode, the correspondence between physical name and node name is temporarily disrupted. In this event, the node can be managed via the node identifier, which is the name for the physical device. The node identifier is displayed as each node name using PRIMECLUSTER Management View.
The node name is the name of a node that is displayed with the "uname -n" command and identified in the communication network. For details, see uname(1) in the "Solaris X Reference Manual Collection".
Every node in a cluster maintains a local state for every other node in that cluster. The node state of every node in the cluster must be either UP, DOWN, or LEFTCLUSTER. For details, see "PRIMECLUSTER Cluster Foundation (CF) (Solaris) Configuration and Administration Guide".
The node with the possibility that MDS performs. MDS performs in either node that it is defined as MDS node in nodes that share the file system. The default MDS node is 2 for the primary and secondary MDS.
The partition is a physical or logical disk slice.
This information refers to the partitions that constitute the GFS Shared File System. It includes information about the size of the meta-data area, update log area, file data area (data area) and on their layout in the configuration partition.
Node on which the management server daemon of the Web-Based Admin View operates during normal operation. The primary management server uses the menus of the GFS Management View to accept operation and display requests from the client and to transfer the requests to the monitored nodes.
Node on which the MDS operates during normal operation in a cluster system. This server should be set during file system registration.
The local area network (LAN) by which normal users access a machine.
State in which integrity is maintained among the nodes that configure the cluster system. Specifically, the CF state in all nodes that configure the cluster system is either UP or DOWN (there is no LEFTCLUSTER node). For details, see "PRIMECLUSTER Cluster Foundation (CF) (Solaris) Configuration and Administration Guide".
quota is a function of UFS for limiting disk space or the number of i-nodes that can be used by the user. For details, see edquota(1M) in the "Solaris X Reference Manual Collection".
See Remote console connection unit.
A device used to connect an RS-232C interface to a LAN interface. With this device, users can use the Telnet function to access the TTY console function from other devices (personal computers) connected through a LAN.
The package that maintains high availability of user-specified resources by providing monitoring and switchover capabilities. For details ,see "PRIMECLUSTER Reliant Monitor Services (RMS) with Wizard Tools (Solaris, Linux) Configuration and Administration Guide".
The representative partition is a GFS Shared File System partition that consists of meta-data, update log, and file data (data) areas. It may also consist of meta-data and file data (data) areas.
Update method used to fix an application or maintenance within the cluster system. Fix application is enabled by applying fixes to each node sequentially without stopping jobs.
Round robin allocation is a file data allocation mode for allocating separate file data to multiple file data areas.
A range of node set that can share an object when a disk class is shared.
Node on which the Web-Based Admin View management server daemon operates if an error occurs on the primary management server. A secondary management server is set when the Web-Based Admin View operating environment is set. If an error occurs on the primary management server, the management server function of the Web-Based Admin View passes to the secondary management server.
Server that takes over the MDS function if an error occurs on the primary server in a cluster system. The secondary server must be set during file system registration before it can assume the MDS function when an error occurs on the primary server. The file system status is restored to assure contiguous access from each AC.
Receives a request from the sfcfsd or the commands and provides the communication paths of commands-sfcfsd, commands-sfcprmd and inter-node. Configuration database management and the management partition I/O functions are also provided.
Provides MDS/AC control functions such as the GFS Shared File System operation start/stop, failover of MDS.
Used to monitor the startup, stop, or failure of the processes that constitute the GFS Shared File System. When the configuration process starts or executes another daemon or command, a request is transmitted to sfcprmd, and then sfcprmd executes a daemon or a command as required.
The process from which a request is transmitted is referred to as the client process, while the process to be started from sfcprmd as required is referred to as the target process.
The target process is monitored by sfcprmd and, when the process terminates normally or abnormally, the status is posted to the client process.
Object set which belongs to shared disk class. Each object may also be referred to as shared class, shared group and shared disk.
One of operation modes of a shared disk device. Applications in each node can simultaneously access a shared disk device on their own. (Note that the terms shared disk device and shared disk have different meanings. To distinguish between the two terms, a "shared disk" may be referred to as a "shared disk for simultaneous access.")
Disk device connected to multiple nodes. FDU/FUs and disk arrays are available as PRIMECLUSTER shared disk devices. Shared disk devices can be designated as shared disks or switched disks according to whether multiple nodes are allowed to access them simultaneously. (Note that the terms shared disk device and shared disk has different meanings.)
The nodes shared the data of GFS Shared File System. Up to 2 nodes are allowed.
A slice is an alias of a partition.
The super block contains information on the type of the file system, dates of creation and updating, label information, information on size and layout of the file system, and summary information on free areas.
A copy of the super block is created so that file system processing can continue even if the original super block is damaged by a block fault in the disk device.
Disk on which the operating Solaris OS is installed. The entire disk containing a slice currently operating as the file system (or swap area) of one of the following:
1-/
2-/usr
3-/var
4-swap area
A node state that indicates that the node can communicate with other nodes in the cluster. For details, see "PRIMECLUSTER Cluster Foundation (CF) (Solaris) Configuration and Administration Guide".
The update log contains the history of updates made to the file system structure. The history information is used to make a high-speed recovery of a file system possible. The area that contains the update log is called the update log area. Data in this area is overwritten cyclically.
The update log area contains update log.
Update log data that was loaded into memory.
Update log replay updates meta-data in the update log area for which an update had been interrupted. This feature is used to recover the file system in the case of failures.
Directory blocks, symbolic link path names, and indirect blocks are collectively referred to as V-data. This data is stored in the V-data area that was allocated in the meta-data area.
The V-data area contains V-data. It is allocated in the meta-data area.
See logical volume.
Software for system operation and management using the Web screen. For details, see "PRIMECLUSTER Web-Based Admin View Operation Guide".
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Contents
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