Re: Async write

2011-02-20 Thread Aaron Morton
Sorry, was typing faster than my brain was working. I was trying to say at the higher level the request would block for the write operations in other DC's to complete. As you say.That was the ticket I was thinking of. ThanksAaron On 21 Feb, 2011,at 01:19 PM, Jonathan Ellis wrote:On Sun, Feb 20, 20

Re: Async write

2011-02-20 Thread Jonathan Ellis
On Sun, Feb 20, 2011 at 1:36 PM, Aaron Morton wrote: > > On 19/02/2011, at 10:24 AM, Anthony John wrote: > > > > Fact as i understand them:- > > - A write call to db triggers a number of async writes to all nodes where > > the particular write should be recorded (and the nodes are up per Gossip a

Re: Async write

2011-02-20 Thread Aaron Morton
Use N=3 and W=2? And the 3rd one (assuming will be async) will be in other > DC? How do I set it up or possible to setup? > -- > View this message in context: > http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Async-write-tp6041440p6041479.html > Sent from the cassandra-u...@incubator.apache.org mailing list archive at > Nabble.com. >

Re: Async write

2011-02-18 Thread Anthony John
e to wait. What are my options > or alternatives? > > Use N=3 and W=2? And the 3rd one (assuming will be async) will be in other > DC? How do I set it up or possible to setup? > -- > View this message in context: > http://cassandra-user-incubator-apache-org.3065146.n2.nabble.co

Re: Async write

2011-02-18 Thread A J
ay I want to have W=3 with networktopology with DC1 getting 1 sync write > + 1 async write and DC2 always getting async write. > > > -- > View this message in context: > http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Async-write-tp6041440p6041440.html > Sent fr

Re: Async write

2011-02-18 Thread mcasandra
async) will be in other DC? How do I set it up or possible to setup? -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Async-write-tp6041440p6041479.html Sent from the cassandra-u...@incubator.apache.org mailing list archive at Nabble.com.

Re: Async write

2011-02-18 Thread Anthony John
eg: > > If I want to have W=2 but 1 write as sync and the 2nd as async. > > Or say I want to have W=3 with networktopology with DC1 getting 1 sync > write > + 1 async write and DC2 always getting async write. > > > -- > View this message in context: > http://c

Async write

2011-02-18 Thread mcasandra
I am still trying to understand how writes work. Is there any concept of sync and async writes? For eg: If I want to have W=2 but 1 write as sync and the 2nd as async. Or say I want to have W=3 with networktopology with DC1 getting 1 sync write + 1 async write and DC2 always getting async