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

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1502455

            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):
glusterfs*-3.12.1-2.el7.x86_64

How reproducible:
Consistently

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.