Hello Guys,
We wrote a tool with Python, which is used to display DLM lock usages in a OCFS2
cluster.
o2locktop is a top-like OCFS2 DLM lock monitor, it displays DLM lock usages via
querying OCFS2 file system statistics from the specified nodes.
Therefore, OCFS2 kernel modules must enable OCFS2_FS_STATS configuration option
when compiling.
If you want to know if the current OCFS2 kernel modules enable OCFS2_FS_STATS
setting, you can refer to /boot/config-`uname -r` file.
You can utilize o2locktop to detect the hot files/directories, whose DLM locks
are frequently referenced among the cluster.
You can get the maximal wait time per DLM lock, this helps you identify which
hot files/directories should be decoupled for improving file access performance.
For more details, please visit the link
https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_ganghe_o2locktop&d=DwIFAg&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=wXmkJNAUtutY0U9inuQWCbzSSRji5zLpyR0a_Mek4jM&m=93wGE0zLoHuCKph4-kgDwzuZm9oc1J4Mhz9PxVbVxZc&s=lVluTYcXetvTd2GFdOJLcqDtQcWFhVrDY5I6MI1r_Ow&e=
This tool is expected to be used for SUSE customer, if you are interested,
welcome to use, to contribute, suggestions, etc.
Thanks a lot.
Gang
