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<div class="moz-cite-prefix">On 03/30/2016 01:03 AM, Russell
Purinton wrote:<br>
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cite="mid:2F370201-DFA7-43A2-A61D-5D16B1CBCF64@gmail.com"
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Hi all, sorry for 2 threads today, but I felt like this deserved a
separate thread…
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<div class="">I was trying to replace my replica 2 volumes with
replica 3 arbiter 1 volumes… The new volumes though are 10x
slower on direct writes than their replica 2 counterparts. Im
wondering if this is to be expected or if I might have done
something wrong? I confirmed that no data is being written
into the arbiter bricks, just meta data.</div>
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It does look like a bug Russel. Another user had reported the same
behavior. I'll take a look and update.<br>
Thanks,<br>
Ravi<br>
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cite="mid:2F370201-DFA7-43A2-A61D-5D16B1CBCF64@gmail.com"
type="cite">
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<div class=""> Here’s the tests I ran. I did the dd tests
multiple times with different file names, and they all had the
same speeds ….</div>
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<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">[root@fs134 wtg002]# dd if=/dev/zero of=test
bs=1M count=100 oflag=direct</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">100+0 records in</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">100+0 records out</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">104857600 bytes (105 MB) copied, 9.49974 s,
11.0 MB/s</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">[root@fs134 wtg002]# cd ..</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">[root@fs134 home]# cd wtg001</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">[root@fs134 wtg001]# dd if=/dev/zero of=test
bs=1M count=100 oflag=direct</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">100+0 records in</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">100+0 records out</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">104857600 bytes (105 MB) copied, 0.888929 s,
118 MB/s</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">[root@fs134 wtg001]# gluster volume info wtg001</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69); min-height: 14px;" class=""><br class="">
</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Volume Name: wtg001</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Type: Distributed-Replicate</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Volume ID: 53179cfe-9896-4c94-9f1d-01dd474e027e</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Status: Started</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Number of Bricks: 2 x 2 = 4</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Transport-type: tcp</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Bricks:</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick1: xs141:/brick1/wtg001p0r0</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick2: xs138:/brick1/wtg001p0r1</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick3: xs139:/brick1/wtg001p1r0</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick4: xs140:/brick1/wtg001p1r1</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Options Reconfigured:</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">nfs.disable: on</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">performance.readdir-ahead: on</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">[root@fs134 wtg001]# gluster volume info wtg002</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69); min-height: 14px;" class=""><br class="">
</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Volume Name: wtg002</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Type: Distributed-Replicate</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Volume ID: 410b67ad-bc1e-473b-b98f-ad431d7c9831</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Status: Started</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Number of Bricks: 2 x 3 = 6</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Transport-type: tcp</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Bricks:</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick1: xs141:/brick1/wtg001d2r0</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick2: xs138:/brick1/wtg001d2r1</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick3: xs139:/brick1/wtg001d2ra</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick4: xs139:/brick1/wtg001d3r0</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick5: xs140:/brick1/wtg001d3r1</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Brick6: xs141:/brick1/wtg001d3ra</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">Options Reconfigured:</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">nfs.disable: on</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">performance.readdir-ahead: on</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">[root@fs134 wtg001]# mount | grep wtg</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">0:/wtg001 on /home/wtg001 type fuse.glusterfs
(rw,default_permissions,allow_other,max_read=131072)</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">0:/wtg002 on /home/wtg002 type fuse.glusterfs
(rw,default_permissions,allow_other,max_read=131072)</div>
<div style="margin: 0px; line-height: normal; color: rgb(69, 69,
69);" class="">[root@fs134 wtg001]#</div>
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<img moz-do-not-send="true"
src="http://t.sidekickopen04.com/e1t/o/5/f18dQhb0S7ks8dDMPbW2n0x6l2B9gXrN7sKj6v4LN9-W2z8_hM5wLWr-N7dSKlbd3_yKW6jq8hk1k1H6H0?si=6102096971038720&pi=E9747E1A-C2BC-4FFB-B159-E8BC5ADEC31B"
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