NFS client not able to gain locks on file.

Solution Verified - Updated -

Issue

  • Without the nolock option, databases hosted on NFS share do not start anymore or are operating slowly.

  • Using strace on processes shows the software cannot process a lock :

    stat("/method/meth/mnt/data/db/meth/.lock", {st_mode=S_IFREG|0600, st_size=44, ...}) = 0
open("/method/meth/mnt/data/db/meth/.lock", O_RDWR) = 6
fcntl(6, F_SETLKW, {type=F_WRLCK, whence=SEEK_CUR, start=0, len=1}

  • We see several NLM_BLOCK and NLM_DENIED in network captures.

Environment

  • Red Hat Enterprise Linux 5

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.