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In-Reply-To: <282B2A60-D039-41B2-BC36-F157DAF72D83@thelastpickle.com>
References: 
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	<282B2A60-D039-41B2-BC36-F157DAF72D83@thelastpickle.com>
Date: Thu, 16 Feb 2012 10:15:11 +0100
Message-ID: 
 <CADVHTB-tR_6VgaU7yRF198Ykq-4iqiFd4yK+GtpFOOO5PgFLAQ@mail.gmail.com>
Subject: Re: Replication factor per column family
From: "R. Verlangen" <robin@us2.nl>
To: user@cassandra.apache.org
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Hmm ok. This means if I want to have a CF with RF = 3 and another CF with
RF = 1 (e.g. some debug logging) I will have to create 2 keyspaces?

2012/2/16 aaron morton <aaron@thelastpickle.com>

> Multiple CF mutations for a row are treated atomically in the commit log,
> and they are sent together to the replicas. Replication occurs at the row
> level, not the row+cf level.
>
> If each CF had it's own RF, odd things may happen. Like sending a batch
> mutation for one row and two CF's that fails because there is not enough
> nodes for one of the CF's.
>
> Would be other reasons as well. In short it's baked in.
>
> Cheers
>
> -----------------
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 16/02/2012, at 9:54 PM, R. Verlangen wrote:
>
> Hi there,
>
> As the subject states: "Is it possible to set a replication factor per
> column family?"
>
> Could not find anything of recent releases. I'm running Cassandra 1.0.7
> and I think it should be possible on a per CF basis instead of the whole
> keyspace.
>
> With kind regards,
> Robin
>
>
>

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Hmm ok. This means if I want to have a CF with RF =3D 3 and another CF with=
 RF =3D 1 (e.g. some debug logging) I will have to create 2 keyspaces?<br><=
br><div class=3D"gmail_quote">2012/2/16 aaron morton <span dir=3D"ltr">&lt;=
<a href=3D"mailto:aaron@thelastpickle.com">aaron@thelastpickle.com</a>&gt;<=
/span><br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word"><div>Mul=
tiple CF mutations for a row are treated atomically in the commit log, and =
they are sent together to the replicas. Replication occurs at the row level=
, not the row+cf level.=A0</div>
<div><br></div><div>If each CF had it&#39;s own RF, odd things may happen. =
Like sending a batch mutation for one row and two CF&#39;s that fails becau=
se there is not enough nodes for one of the CF&#39;s.=A0</div><div><br></di=
v>
<div>Would be other reasons as well. In short it&#39;s baked in.=A0</div><d=
iv><br></div><div>Cheers</div><div><br><div>
<span style=3D"text-indent:0px;letter-spacing:normal;font-variant:normal;te=
xt-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:norm=
al;border-collapse:separate;text-transform:none;font-size:medium;white-spac=
e:normal;font-family:Helvetica;word-spacing:0px"><span style=3D"text-indent=
:0px;letter-spacing:normal;font-variant:normal;font-style:normal;font-weigh=
t:normal;line-height:normal;border-collapse:separate;text-transform:none;fo=
nt-size:medium;white-space:normal;font-family:Helvetica;word-spacing:0px"><=
div style=3D"word-wrap:break-word">
<span style=3D"text-indent:0px;letter-spacing:normal;font-variant:normal;fo=
nt-style:normal;font-weight:normal;line-height:normal;border-collapse:separ=
ate;text-transform:none;font-size:medium;white-space:normal;font-family:Hel=
vetica;word-spacing:0px"><div style=3D"word-wrap:break-word">
<span style=3D"text-indent:0px;letter-spacing:normal;font-variant:normal;fo=
nt-style:normal;font-weight:normal;line-height:normal;border-collapse:separ=
ate;text-transform:none;font-size:medium;white-space:normal;font-family:Hel=
vetica;word-spacing:0px"><div style=3D"word-wrap:break-word">
<div><div>-----------------</div><div>Aaron Morton</div><div>Freelance Deve=
loper</div><div>@aaronmorton</div><div><a href=3D"http://www.thelastpickle.=
com" target=3D"_blank">http://www.thelastpickle.com</a></div></div></div></=
span></div>
</span></div></span></span>
</div><div><div class=3D"h5">

<br><div><div>On 16/02/2012, at 9:54 PM, R. Verlangen wrote:</div><br><bloc=
kquote type=3D"cite"><div>Hi there,</div><div><br></div>As the subject stat=
es: &quot;Is it possible to set a replication factor per column family?&quo=
t;<div>
<br></div><div>Could not find anything of recent releases. I&#39;m running =
Cassandra 1.0.7 and I think it should be possible on a per CF basis instead=
 of the whole keyspace.</div>
<div><br></div><div>With kind regards,</div><div>Robin</div>
</blockquote></div><br></div></div></div></div></blockquote></div><br>

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