Bug 1194433

Summary: Perf: Performance degrades as data is added.
Product: [Red Hat Storage] Red Hat Gluster Storage Reporter: Ben Turner <bturner>
Component: coreAssignee: Shyamsundar <srangana>
Status: CLOSED CANTFIX QA Contact: Ben Turner <bturner>
Severity: high Docs Contact:
Priority: unspecified    
Version: rhgs-3.0CC: bkunal, nbalacha, pkarampu, rgowdapp, rhs-bugs, sankarshan, srangana
Target Milestone: ---Keywords: ZStream
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard: dht-rca-unknown, dht-qe-3.2
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-02-07 04:19:56 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Ben Turner 2015-02-19 19:43:20 UTC 
Description of problem:

As volumes get fuller performance starts to degrade.  I was adding data to a 20 TB volume and I started to notice the perf hit when it hit 2 TB(10% full).  To quantify we created an empty volume on the same bricks and ran the following reproducer:

# time tar xf boost_1_57_0.tar.gz

On the fuller / aged volume it took significantly longer to untar.

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

glusterfs-3.6.0.42-1.el6rhs.x86_64

How reproducible:

Every time I tried so far.

Steps to Reproduce:
1.  Create teo volumes on the same bricks
2.  Fill 1 up with data(~50%)
3.  Untar the files

Actual results:

Performance degrades when the volume hits ~10% usage.

Expected results:

Performance does not degrade as the volume gets fuller.

Additional info:

We have this reproed in the lab, ping me for access to the setuo.
Comment 1 Shyamsundar 2015-02-19 21:26:38 UTC 
@Pranith, request you post your current analysis here on the same, thanks.
Comment 5 Amar Tumballi 2018-02-07 04:19:56 UTC 
Thank you for your report. This bug is filed against a component for which no further new development is being undertaken.

If you find the bug relevant in the higher versions too, please feel free to reopen the bug.
Comment 6 Red Hat Bugzilla 2023-09-14 02:55:07 UTC 
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days