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From 556219c19dc9d566df05262a7caae73ef335343f Mon Sep 17 00:00:00 2001
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From: Pranith Kumar K <pkarampu@redhat.com>
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Date: Wed, 26 Jul 2017 20:27:08 +0530
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Subject: [PATCH 586/587] group-gluster-block: Set default shard-block-size to
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64MB
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With 4MB shard size I/O slows down more because of the extra
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inodelk/xattrops in replicate. So increasing it to 64MB which
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gave better performance than 4MB.
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To simulate writes on a preallocated VM-image, fallocate the file and then do
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dd with notrunc
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do "fallocate -l 1GB" then "dd if=/dev/zero of=file-1GB bs=1MB count=1024 conv=notrunc"
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These are the results on my laptop for dd:
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With 4MB:
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1.84 1357.37 us 19.00 us 12431.00 us 1188 FINODELK
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2.45 255.08 us 58.00 us 4038.00 us 8428 WRITE
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95.69 78967.76 us 30.00 us 20324240.00 us 1063 FXATTROP
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With 64MB:
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0.13 59.36 us 15.00 us 814.00 us 657 FINODELK
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6.02 225.53 us 69.00 us 6556.00 us 8205 WRITE
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93.82 103015.12 us 32.00 us 13046368.00 us 280 FXATTROP
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>BUG: 1475605
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>Change-Id: I4ed5441409df639e38c731ba0d140fe92902f25f
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>Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
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>Reviewed-on: https://review.gluster.org/17887
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>CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
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>Smoke: Gluster Build System <jenkins@build.gluster.org>
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>Reviewed-by: Krutika Dhananjay <kdhananj@redhat.com>
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BUG: 1472273
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Change-Id: I4ed5441409df639e38c731ba0d140fe92902f25f
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Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/114103
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Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
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Tested-by: Atin Mukherjee <amukherj@redhat.com>
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---
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extras/group-gluster-block | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/extras/group-gluster-block b/extras/group-gluster-block
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index cea15d8..12d5f90 100644
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--- a/extras/group-gluster-block
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+++ b/extras/group-gluster-block
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@@ -12,5 +12,6 @@ cluster.locking-scheme=granular
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cluster.shd-max-threads=8
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cluster.shd-wait-qlength=10000
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features.shard=on
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+features.shard-block-size=64MB
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user.cifs=off
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server.allow-insecure=on
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--
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1.8.3.1
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