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Red Hat GFS 6.0: Administrator's Guide
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8.3. LOCK_NOLOCK

The LOCK_NOLOCK system allows GFS to be used as a local file system on a single node.

The kernel module for a GFS/LOCK_NOLOCK node is lock_nolock.o. The lock protocol as specified when creating a GFS/LOCK_NOLOCK file system is called lock_nolock (lower case, with no .o extension).

CautionCaution
 

Do not allow multiple nodes to mount the same file system while LOCK_NOLOCK is used. Doing so causes one or more nodes to panic their kernels, and may cause file system corruption.

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