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89 lines
3.0 KiB
89 lines
3.0 KiB
What: /sys/fs/ocfs2/ |
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Date: April 2008 |
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Contact: [email protected] |
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Description: |
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The /sys/fs/ocfs2 directory contains knobs used by the |
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ocfs2-tools to interact with the filesystem. |
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What: /sys/fs/ocfs2/max_locking_protocol |
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Date: April 2008 |
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Contact: [email protected] |
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Description: |
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The /sys/fs/ocfs2/max_locking_protocol file displays version |
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of ocfs2 locking supported by the filesystem. This version |
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covers how ocfs2 uses distributed locking between cluster |
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nodes. |
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The protocol version has a major and minor number. Two |
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cluster nodes can interoperate if they have an identical |
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major number and an overlapping minor number - thus, |
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a node with version 1.10 can interoperate with a node |
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sporting version 1.8, as long as both use the 1.8 protocol. |
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Reading from this file returns a single line, the major |
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number and minor number joined by a period, eg "1.10". |
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This file is read-only. The value is compiled into the |
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driver. |
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What: /sys/fs/ocfs2/loaded_cluster_plugins |
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Date: April 2008 |
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Contact: [email protected] |
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Description: |
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The /sys/fs/ocfs2/loaded_cluster_plugins file describes |
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the available plugins to support ocfs2 cluster operation. |
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A cluster plugin is required to use ocfs2 in a cluster. |
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There are currently two available plugins: |
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* 'o2cb' - The classic o2cb cluster stack that ocfs2 has |
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used since its inception. |
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* 'user' - A plugin supporting userspace cluster software |
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in conjunction with fs/dlm. |
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Reading from this file returns the names of all loaded |
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plugins, one per line. |
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This file is read-only. Its contents may change as |
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plugins are loaded or removed. |
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What: /sys/fs/ocfs2/active_cluster_plugin |
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Date: April 2008 |
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Contact: [email protected] |
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Description: |
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The /sys/fs/ocfs2/active_cluster_plugin displays which |
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cluster plugin is currently in use by the filesystem. |
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The active plugin will appear in the loaded_cluster_plugins |
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file as well. Only one plugin can be used at a time. |
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Reading from this file returns the name of the active plugin |
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on a single line. |
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This file is read-only. Which plugin is active depends on |
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the cluster stack in use. The contents may change |
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when all filesystems are unmounted and the cluster stack |
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is changed. |
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What: /sys/fs/ocfs2/cluster_stack |
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Date: April 2008 |
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Contact: [email protected] |
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Description: |
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The /sys/fs/ocfs2/cluster_stack file contains the name |
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of current ocfs2 cluster stack. This value is set by |
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userspace tools when bringing the cluster stack online. |
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Cluster stack names are 4 characters in length. |
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When the 'o2cb' cluster stack is used, the 'o2cb' cluster |
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plugin is active. All other cluster stacks use the 'user' |
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cluster plugin. |
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Reading from this file returns the name of the current |
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cluster stack on a single line. |
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Writing a new stack name to this file changes the current |
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cluster stack unless there are mounted ocfs2 filesystems. |
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If there are mounted filesystems, attempts to change the |
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stack return an error. |
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Users: |
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ocfs2-tools <[email protected]>
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