Depends on use case. For ours we have another experience and statistics, when turning dynamic snitch off makes overall latency and spikes much, much lower.
Best regards / Pagarbiai Viktor Jevdokimov Senior Developer Email: viktor.jevdoki...@adform.com<mailto:viktor.jevdoki...@adform.com> Phone: +370 5 212 3063, Fax +370 5 261 0453 J. Jasinskio 16C, LT-01112 Vilnius, Lithuania Follow us on Twitter: @adforminsider<http://twitter.com/#!/adforminsider> What is Adform: watch this short video<http://vimeo.com/adform/display> [Adform News] <http://www.adform.com> Disclaimer: The information contained in this message and attachments is intended solely for the attention and use of the named addressee and may be confidential. If you are not the intended recipient, you are reminded that the information remains the property of the sender. You must not use, disclose, distribute, copy, print or rely on this e-mail. If you have received this message in error, please contact the sender immediately and irrevocably delete this message and any copies. From: Brandon Williams [mailto:dri...@gmail.com] Sent: Thursday, May 24, 2012 02:35 To: user@cassandra.apache.org Subject: Re: Replication factor On Wed, May 23, 2012 at 5:51 AM, Viktor Jevdokimov <viktor.jevdoki...@adform.com<mailto:viktor.jevdoki...@adform.com>> wrote: > When RF == number of nodes, and you read at CL ONE you will always be reading > locally. "always be reading locally" - only if Dynamic Snitch is "off". With dynamic snitch "on" request may be redirected to other node, which may introduce latency spikes. Actually it's preventing spikes, since if it won't read locally that means the local replica is in worse shape than the rest (compacting, repairing, etc.) -Brandon
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