Red Hat GFS 6.1 -, Руководство администратора

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2 Chapter 1. GFS Overview
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Cluster infrastructure provided by Red Hat Cluster Suite — This release of Red Hat
GFS uses the cluster infrastructure of Red Hat Cluster Suite, taking advantage of the
Red Hat Cluster Suite configuration file and cluster graphical user interface (GUI),
system-config-cluster
. For information about configuring and managing Red Hat
Cluster Suite, refer to Red Hat Cluster Suite Configuring and Managing a Cluster . Pre-
vious versions of Red Hat GFS provided a cluster infrastructure that was exclusive to
GFS (even though used with Red Hat Cluster Suite). Additionally, configuration files in
earlier versions of Red Hat GFS were created and maintained via text editors only (that
is, no GUI was available).
•
Red Hat Cluster Suite lock architectures — Via Red Hat Cluster Suite, GFS can use the
following lock architectures:
•
DLM (Distributed Lock Manager), new for Red Hat GFS 6.1 — DLM provides lock
management throughout a Red Hat cluster, requiring no nodes to be configured as
lock management nodes (contrasted to GULM, which does require certain nodes to
be configured as lock management nodes).
•
GULM (Grand Unified Lock Manager) — A client/server lock architecture that is
compatible with Red Hat GFS 6.0.
•
Nolock — For single node operation only.
•
New volume manager, LVM2 — The
pool
volume manager in earlier releases of Red
Hat GFS is replaced with LVM2 for this release. LVM2 is used in conjunction with
CLVM (Cluster Logical Volume Manager). This release provides a tool to convert GFS
6.0
pool
volumes to the LVM2 format. For information about converting
pool
volumes
to the LVM2 format, refer to Appendix A Upgrading GFS .
•
Enhanced
gfs_fsck
performance and changes to the
gfs_fsck
command — The
gfs_fsck
function performs 10 times as fast as
gfs_fsck
in earlier GFS releases.
(This enhancement has been included in a recent update to Red Hat GFS 6.0, also.) In
addition, the enhanced
gfs_fsck
function includes changes to certain command op-
tions. For more information about changes to the command options, refer to Section
5.12 Repairing a File System .
•
Withdraw individual mount points — Allows individual GFS mount points to gracefully
discontinue operations on a node without causing that node to panic. This feature pro-
vides the ability to continue operations with unaffected file systems on that node. The
feature can be overridden to allow a node to panic, thereby providing more informa-
tion for troubleshooting. For more information, refer to the
mount
command option,
oopses_ok
, in Table 5-2
•
Increased storage supported — Red Hat GFS supports 8 terabytes of storage per GFS
file system. For more information about Red Hat GFS requirements, refer to Chapter 2
System Requirements