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From Viktor Jevdokimov <Viktor.Jevdoki...@adform.com>
Subject RE: get dinamicsnith info from php
Date Mon, 14 May 2012 14:29:07 GMT
I'm not sure, that selecting node upon DS is a good idea. First of all every node has values
about every node, including self. Self DS values are always better than others.

For example, 3 nodes RF=2:


N1

N2

N3

N1

0.5ms

2ms

2ms

N2

2ms

0.5ms

2ms

N3

2ms

2ms

0.5ms


We have monitored many Cassandra counters, including DS values for every node, and graphs
shows that latencies is not about load.

So the strategy should be based on use case, node count, RF, replica placement strategy, read
repair chance, and more, and more...

What do you want to achieve?




Best regards / Pagarbiai
Viktor Jevdokimov
Senior Developer

Email: Viktor.Jevdokimov@adform.com<mailto:Viktor.Jevdokimov@adform.com>
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From: ruslan usifov [mailto:ruslan.usifov@gmail.com]
Sent: Monday, May 14, 2012 16:58
To: user@cassandra.apache.org
Subject: get dinamicsnith info from php

Hello

I want to route request from php client to minimaly loaded node, so i need dinamicsnitch info
and gosip, how can i get this info fro php. Perhaps need some daemon that can communicate
with cassandra gosip and translate this info to php (socket for example)???

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