搜索

此内容没有您所选择的语言版本。

4.6. Adding Journals to a File System

download PDF
The gfs_jadd command is used to add journals to a GFS file system after the device where the file system resides has been expanded. Running a gfs_jadd command on a GFS file system uses space between the current end of the file system and the end of the device where the file system resides. When the fill operation is completed, the journal index is updated.
The gfs_jadd command must be run on mounted file system, but it only needs to be run on one node in the cluster. All the other nodes sense that the expansion has occurred.
To verify that the changes were successful, use the gfs_jadd command with the -T (test) and -v (verbose) flags. Running the command with those flags displays the current state of the mounted GFS file system.

Usage

gfs_jadd -j Number MountPoint
Number
Specifies the number of new journals to be added.
MountPoint
Specifies the directory where the GFS file system is mounted.

Comments

Before running the gfs_jadd command:
  • Back up important data on the file system.
  • Run a gfs_tool df MountPoint command to display the volume used by the file system where journals will be added.
  • Expand the underlying cluster volume with LVM. For information on administering LVM volumes, see the LVM Administrator's Guide
After running the gfs_jadd command, run a gfs_jadd command with the -T and -v flags enabled to check that the new journals have been added to the file system.

Examples

In this example, one journal is added to the file system on the /gfs1 directory.
gfs_jadd -j1 /gfs1
In this example, two journals are added to the file system on the /gfs1 directory.
gfs_jadd -j2 /gfs1
In this example, the current state of the file system on the /gfs1 directory is checked for the new journals.
gfs_jadd -Tv /gfs1

Complete Usage

gfs_jadd [Options] {MountPoint | Device} [MountPoint | Device]
MountPoint
Specifies the directory where the GFS file system is mounted.
Device
Specifies the device node of the file system.
Table 4.4, “GFS-specific Options Available When Adding Journals” describes the GFS-specific options that can be used when adding journals to a GFS file system.
Table 4.4. GFS-specific Options Available When Adding Journals
Flag Parameter Description
-h Help. Displays short usage message.
-J MegaBytes Specifies the size of the new journals in megabytes. Default journal size is 128 megabytes. The minimum size is 32 megabytes. To add journals of different sizes to the file system, the gfs_jadd command must be run for each size journal. The size specified is rounded down so that it is a multiple of the journal-segment size that was specified when the file system was created.
-j Number Specifies the number of new journals to be added by the gfs_jadd command. The default value is 1.
-T Test. Do all calculations, but do not write any data to the disk and do not add journals to the file system. Enabling this flag helps discover what the gfs_jadd command would have done if it were run without this flag. Using the -v flag with the -T flag turns up the verbosity level to display more information.
-q Quiet. Turns down the verbosity level.
-V Displays command version information.
-v Turns up the verbosity of messages.
Red Hat logoGithubRedditYoutubeTwitter

学习

尝试、购买和销售

社区

关于红帽文档

通过我们的产品和服务,以及可以信赖的内容,帮助红帽用户创新并实现他们的目标。

让开源更具包容性

红帽致力于替换我们的代码、文档和 Web 属性中存在问题的语言。欲了解更多详情,请参阅红帽博客.

關於紅帽

我们提供强化的解决方案,使企业能够更轻松地跨平台和环境(从核心数据中心到网络边缘)工作。

© 2024 Red Hat, Inc.