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Subject: Re: Measuring WAN replication latency
References: <9E536FA4-0948-428B-8F9B-EB4B5B948E11@rahul.be>
 <CAEDUwd3NPRfKbcrfgQw-14hyrqrSknSe0TpkK89y4Yn3oB-fuA@mail.gmail.com>
From: Rahul Neelakantan <rahul@rahul.be>
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Date: Wed, 30 Jul 2014 09:59:42 -0400
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Rob,
Any ideas you can provide on how to do this will be appreciated, we would li=
ke to build a latency monitoring tool/dashboard that shows how long it takes=
 for data to get sent across various DCs.

Rahul Neelakantan

> On Jul 29, 2014, at 8:53 PM, Robert Coli <rcoli@eventbrite.com> wrote:
>=20
>> On Tue, Jul 29, 2014 at 3:15 PM, Rahul Neelakantan <rahul@rahul.be> wrote=
:
>> Does anyone know of a way to measure/monitor WAN replication latency for C=
assandra?
>=20
> No. [1]
>=20
> =3DRob
> =20
> [1] There are ways to do something like this task, but you probably don't a=
ctually want to do them. Trying to do them suggests that you are relying on W=
AN replication timing for your application, which is something you almost ce=
rtainly do not want to do. Why do you believe you have this requirement?

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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Rob,</div><div>Any ideas you can provide on how to do this will be appreciated, we would like to build a latency monitoring tool/dashboard that shows how long it takes for data to get sent across various DCs.<br><br><div>Rahul Neelakantan</div></div><div><br>On Jul 29, 2014, at 8:53 PM, Robert Coli &lt;<a href="mailto:rcoli@eventbrite.com">rcoli@eventbrite.com</a>&gt; wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Jul 29, 2014 at 3:15 PM, Rahul Neelakantan <span dir="ltr">&lt;<a href="mailto:rahul@rahul.be" target="_blank">rahul@rahul.be</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Does anyone know of a way to measure/monitor WAN replication latency for Cassandra?</blockquote><div><br></div><div>No. [1]</div>
<div><br></div><div>=Rob</div><div>&nbsp;</div><div>[1] There are ways to do something like this task, but you probably don't actually want to do them. Trying to do them suggests that you are relying on WAN replication timing for your application, which is something you almost certainly do not want to do. Why do you believe you have this requirement?</div>
</div></div></div>
</div></blockquote></body></html>
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