[Bugs] [Bug 1502455] New: disperse eager-lock degrades performance for file create workloads

bugzilla at redhat.com bugzilla at redhat.com
Mon Oct 16 05:22:47 UTC 2017


            Bug ID: 1502455
           Summary: disperse eager-lock degrades performance for file
                    create workloads
           Product: GlusterFS
           Version: 3.12
         Component: disperse
          Severity: high
          Assignee: bugs at gluster.org
          Reporter: mpillai at redhat.com
                CC: bugs at gluster.org

Description of problem:
The current behavior of the option disperse.eager-lock is not optimal:

disperse.eager-lock on: good performance on large-file read/write, but actually
degrades performance for many file create workloads. The degradation for file
create workloads seems to be due to lock contention on directories.

disperse.eager-lock off: loses the performance advantages of eager-locking for
large-file access, but better performance on file create workloads than with
disperse.eager-lock on.

We should fix eager locking so that it can be kept on without incurring a
performance penalty on file create workloads.

Version-Release number of selected component (if applicable):

How reproducible:

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