Novell LINUX ENTERPRISE 11 - HIGH AVAILABILITY, Руководство пользователя, Страница: 123 / 298

Description and Recommendation OCFS2 Pa-
rameter
Oracle recommends a cluster size of 128 KB or larger for
database volumes. Oracle also recommends a cluster size of 32
or 64 KB for Oracle Home.
The maximum number of nodes that can concurrently mount
a volume. For each of the nodes, OCFS2 creates separate system Number of
node slots
files, such as the journals, for each of the nodes. Nodes that
access the volume can be a combination of little-endian archi-
tectures (such as x86, x86-64, and ia64) and big-endian archi-
tectures (such as ppc64 and s390x).
Node-specific files are referred to as local files. A node slot
number is appended to the local file. For example: journal:0000
belongs to whatever node is assigned to slot number 0.
Set each volume’s maximum number of node slots when you
create it, according to how many nodes that you expect to con-
currently mount the volume. Use the
tunefs.ocfs2
utility
to increase the number of node slots as needed; the value cannot
be decreased.
The smallest unit of space addressable by the file system.
Specify the block size when you create the volume. Block size
Options are 512 bytes (not recommended), 1 KB, 2 KB, or 4
KB (recommended for most volumes). Block size cannot be
modified after the volume is formatted.
12.5 Mounting an OCFS2 Volume
1
Open a terminal window and log in as
root
.
2
Check if the cluster in online with the command
crm_mon
.
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