<div dir="ltr">It was simple emulation of network packets on the port of the server node using tc tool <span id="gmail-docs-internal-guid-16120130-cc52-73fe-580f-d789de74afea"><span style="font-size:10pt;font-family:"Courier New";color:rgb(248,248,242);background-color:rgb(39,40,34);font-weight:700;vertical-align:baseline;white-space:pre-wrap">tc qdisc add dev <port> root netem delay <time>ms</span></span>. The files were created using dd tool (in-built in linux) and mkdir. Post the IO's we verified with no pending heals.<div><br></div><div><br></div><div>Thanks & Regards</div><div> </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Sep 28, 2017 at 2:06 PM, Arman Khalatyan <span dir="ltr"><<a href="mailto:arm2arm@gmail.com" target="_blank">arm2arm@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Interesting table Karan!,<br></div>Could you please tell us how you did the benchmark? fio or iozone orsimilar?<br><br></div>thanks <br><span class="HOEnZb"><font color="#888888">Arman.<br></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Sep 27, 2017 at 1:20 PM, Karan Sandha <span dir="ltr"><<a href="mailto:ksandha@redhat.com" target="_blank">ksandha@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Collin,<div><br></div><div>During our arbiter latency testing for completion of ops we found the below results:- an arbiter node in another data centre and both the data bricks in the same data centre,</div><div><br></div><div>1) File-size 1 KB (10000 files ) </div><div>2) mkdir </div><span id="m_-7287468648546977364m_6114764244475800322gmail-docs-internal-guid-16120130-c30c-79a1-7f27-7d944aad74cd"><br><div dir="ltr" style="margin-left:0pt"><table style="border:none;border-collapse:collapse"><colgroup><col width="78"><col width="78"><col width="78"><col width="78"><col width="78"><col width="78"><col width="78"><col width="78"></colgroup><tbody><tr style="height:16pt"><td style="border-width:0.75pt;border-style:solid;border-color:rgb(204,204,204) rgb(0,0,0) rgb(0,0,0) rgb(204,204,204);vertical-align:middle;padding:2pt"><br></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">Latency</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">5ms</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">10ms</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">20ms</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">50ms</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">100ms</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">200ms</span></p></td></tr><tr style="height:16pt"><td rowspan="2" style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">Ops</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">Create</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">755 secs</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">1410 secs</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">2717 secs</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">5874 secs</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">12908 sec</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">26113 sec</span></p></td></tr><tr style="height:16pt"><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">Mkdir</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">922 secs</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">1725 secs</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">3325 secs</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">8127 secs</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">16160 sec</span></p></td><td style="border-width:0.75pt;border-style:solid;border-color:rgb(0,0,0);vertical-align:middle;padding:2pt"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;text-align:center"><span style="font-size:10pt;font-family:Cantarell;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap">30079 sec</span></p></td></tr></tbody></table></div></span><div> </div><div><br></div><div>Thanks & Regards</div></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="m_-7287468648546977364h5">On Mon, Sep 25, 2017 at 5:40 AM, Colin Coe <span dir="ltr"><<a href="mailto:colin.coe@gmail.com" target="_blank">colin.coe@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="m_-7287468648546977364h5"><div dir="ltr">Hi all<div><br></div><div>I've googled but can't find an answer to my question.</div><div><br></div><div>I have two data centers. Currently, I have a replica (count of 2 plus arbiter) in one data center but is used by both.</div><div><br></div><div>I want to change this to be a distributed replica across the two data centers.</div><div><br></div><div>There is a 20Mbps pipe and approx 22 ms latency. Is this sufficient? </div><div><br></div><div>I really don't want to do the geo-replication in its current form.</div><div><br></div><div>Thanks</div><span class="m_-7287468648546977364m_6114764244475800322HOEnZb"><font color="#888888"><div><br></div><div>CC</div></font></span></div>
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