Re: How many nodes do we require

2016-03-31 Thread Jack Krupansky
nhaddad.com] > *Sent:* jeudi 31 mars 2016 17:48 > > *To:* user@cassandra.apache.org > *Subject:* Re: How many nodes do we require > > > > Losing a write is very different from having a fragile cluster. A fragile > cluster implies that whole thing will fall apart,

RE: How many nodes do we require

2016-03-31 Thread Jacques-Henri Berthemet
You’re right. I meant about data integrity, I understand it’s not everybody’s priority! -- Jacques-Henri Berthemet From: Jonathan Haddad [mailto:j...@jonhaddad.com] Sent: jeudi 31 mars 2016 17:48 To: user@cassandra.apache.org Subject: Re: How many nodes do we require Losing a write is very

Re: How many nodes do we require

2016-03-31 Thread Jonathan Haddad
if > it was not yet replicated. > > > > *--* > > *Jacques-Henri Berthemet* > > > > *From:* Jonathan Haddad [mailto:j...@jonhaddad.com] > *Sent:* vendredi 25 mars 2016 19:37 > > > *To:* user@cassandra.apache.org > *Subject:* Re: How many nodes do we req

Re: How many nodes do we require

2016-03-31 Thread Alain RODRIGUEZ
gt; Because if you lose a node you have chances to lose some data forever if >> it was not yet replicated. >> >> >> >> *--* >> >> *Jacques-Henri Berthemet* >> >> >> >> *From:* Jonathan Haddad [mailto:j...@jonhaddad.com] >> *Sent:* v

Re: How many nodes do we require

2016-03-31 Thread Alain RODRIGUEZ
> > > *From:* Jonathan Haddad [mailto:j...@jonhaddad.com] > *Sent:* vendredi 25 mars 2016 19:37 > > *To:* user@cassandra.apache.org > *Subject:* Re: How many nodes do we require > > > > Why would using CL-ONE make your cluster fragile? This isn't obvious to > me. It's

RE: How many nodes do we require

2016-03-29 Thread Jacques-Henri Berthemet
Because if you lose a node you have chances to lose some data forever if it was not yet replicated. -- Jacques-Henri Berthemet From: Jonathan Haddad [mailto:j...@jonhaddad.com] Sent: vendredi 25 mars 2016 19:37 To: user@cassandra.apache.org Subject: Re: How many nodes do we require Why would

Re: How many nodes do we require

2016-03-25 Thread Jonathan Haddad
; Jacques-Henri Berthemet > > > -Original Message- > From: Rakesh Kumar [mailto:rakeshkumar46...@gmail.com] > Sent: vendredi 25 mars 2016 18:14 > To: user@cassandra.apache.org > Subject: Re: How many nodes do we require > > On Fri, Mar 25, 2016 at 11:45 AM, Jack Krupansky &

RE: How many nodes do we require

2016-03-25 Thread Jacques-Henri Berthemet
Message- From: Rakesh Kumar [mailto:rakeshkumar46...@gmail.com] Sent: vendredi 25 mars 2016 18:14 To: user@cassandra.apache.org Subject: Re: How many nodes do we require On Fri, Mar 25, 2016 at 11:45 AM, Jack Krupansky wrote: > It depends on how much data you have. A single node can store a lot

Re: How many nodes do we require

2016-03-25 Thread Rakesh Kumar
On Fri, Mar 25, 2016 at 11:45 AM, Jack Krupansky wrote: > It depends on how much data you have. A single node can store a lot of data, > but the more data you have the longer a repair or node replacement will > take. How long can you tolerate for a full repair or node replacement? At this time, f

Re: How many nodes do we require

2016-03-25 Thread Jack Krupansky
It depends on how much data you have. A single node can store a lot of data, but the more data you have the longer a repair or node replacement will take. How long can you tolerate for a full repair or node replacement? Generally, RF=3 is both sufficient and recommended. -- Jack Krupansky On Fri

How many nodes do we require

2016-03-25 Thread Rakesh Kumar
We have two data centers. Our requirement is simple Assuming that we have equal number of nodes in each DC we should be able to run with the loss of one DC and loss of at most one node in the surviving DC. Can this be achieved with 6 nodes (3 in each). Obviously for that all data must be availa