path: root/xlators/debug/
diff options
authorPranith Kumar K <>2017-06-20 15:24:33 +0530
committerJeff Darcy <>2017-08-31 17:17:09 +0000
commit75223c0a1b3c7bd65bb0c59449ed1fb0663cfdd3 (patch)
treedbd43339acc661d6f55dd05a42b8893bc6de6604 /xlators/debug/
parentd594900dbca92c356152be65fce16f77c402117c (diff)
debug/delay-gen: Implement delay-generation feature
Background: I was working on a customer issue where the disks were responding some times after seconds. It was becoming very difficult to recreate the issues in our labs, so had to come up with this feature. Requirements: We need an xlator which can delay x% of ops for y micro seconds. We should be able to enable delays for specific fops. This feature is modeled after error-gen. Most of the logic is borrowed from that xlator. This is a minimum implementation of the feature which satisfied the requirements I had. May be in future with more requirements and understanding of the problem further we can improve upon this implementation. Here are the commands and what they do: Enable delay-gen: (This is similar to how err-gen is enabled on the brick side) - gluster volume set <volname> delay-gen posix Set the percentage of fops that need to be delayed - gluster volume set <volname> delay-gen.delay-percentage 50 Default is 10% Set the delay in micro seconds - gluster volume set <volname> delay-gen.delay-duration 500000 Default is 100000 Set comma separated fops to be delayed - gluster v set r2 delay-gen.enable read,write Default is all fops. Fixes #257 Change-Id: Ib547bd39cc024c9cdb63754d21e3aa62fc9d6473 Signed-off-by: Pranith Kumar K <> Reviewed-on: Smoke: Gluster Build System <> CentOS-regression: Gluster Build System <> Reviewed-by: Jeff Darcy <>
Diffstat (limited to 'xlators/debug/')
1 files changed, 1 insertions, 1 deletions
diff --git a/xlators/debug/ b/xlators/debug/
index 6e47615..88fac1c 100644
--- a/xlators/debug/
+++ b/xlators/debug/
@@ -1,3 +1,3 @@
-SUBDIRS = error-gen io-stats sink trace
+SUBDIRS = error-gen io-stats sink trace delay-gen