Red Hat GFS 5.2.1 -, Руководство администратора

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Chapter 7. Using the Cluster Configuration System 73
7.2.3. Comments
The CCS daemon (
ccsd
) uses the Linux raw-device interface to update and read a CCA device di-
rectly, bypassing operating system caches. Caching effects could otherwise create inconsistent views
of the CCA device between cluster nodes.
7.3. Using Other CCS Administrative Options
The following sections detail other administrative functions that can be performed by the
ccs_tool
command.
7.3.1. Extracting Files from a CCS Archive
When extracting original CCS configuration files from a CCS archive, the
ccs_tool extract
com-
mand creates a new directory specified on the command line and recreates the CCS files in the direc-
tory. The CCS archive remains unaffected by this command.
7.3.1.1. Usage
ccs_tool extract CCADevice Directory
CCADevice
Specifies the name of the CCA device.
Directory
The relative path to the directory containing the CCS files for the cluster.
7.3.1.2. Example
In this example, the CCS files contained on the CCA device,
/dev/pool/alpha_cca
, are extracted
and recreated in directory
/tmp/alpha-bak/
.
ccs_tool extract /dev/pool/alpha_cca /tmp/alpha-bak/
7.3.2. Listing Files in a CCS Archive
The CCS configuration files contained within a CCS archive can be listed by using the
ccs_tool
list
command.
7.3.2.1. Usage
ccs_tool list CCADevice
CCADevice
Specifies the name of the CCA device.