[Bugs] [Bug 1273348] [Tier]: lookup from client takes too long {~7m for 18k files}

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1273348



--- Comment #12 from Rahul Hinduja <rhinduja at redhat.com> ---
Verified with the build: glusterfs-3.7.5-7.el7rhgs.x86_64

Volume type: Tiered

Number of files: 17077 {Actual data files with total size of 5G}

Time taken in each case {find . | xargs stat}:

Case 1: Default CTR {enabled} and watermarks enabled {mode=cache}

real    1m13.305s
user    0m1.220s
sys    0m2.686s

Case 2: Enabled watermarks low and hi to 10 and 60 respectively

real    1m16.308s
user    0m1.233s
sys    0m2.769s

Case 3: Enabled watermarks low and hi to 10 and 20 respectively

real    1m12.880s
user    0m1.204s
sys    0m2.551s

Case 4: Set the watermark to test mode {mode=test}

real    1m36.250s
user    0m1.239s
sys    0m2.743s

Case 5: Disabled CTR

real    1m36.958s
user    0m1.246s
sys    0m2.661s

In all the above cases, time taken is approximately same. Moving the bug to
verified state.

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