Hi, thanks for that. Is the default on dw not also quorum though?? so, in my case it should be 2 (since I have 2 nodes)??
thanks, Pat. Date: Fri, 14 Sep 2012 12:11:25 -0400 Subject: Re: missing keys? From: rzeze...@basho.com To: plynch1...@hotmail.com CC: s...@basho.com; riak-users@lists.basho.com Pat, On Fri, Sep 14, 2012 at 11:08 AM, Pat Lynch <plynch1...@hotmail.com> wrote: So, if I write a key to a cluster and then try to query that key, it may not find it unless I retry? Even if r=2 & w=2 ? I thought that at least 2 systems had to have that key (either in memory or disk) for the write to have succeeded with those settings? If I had w=3, would you expect any missed keys ?? (note that I didn't try that because I expected performance issues). It's important to note that `w` is considered complete once the value is queued in-memory waiting to be written do disk [1]. A read does not check the queue but only on-disk data. The `dw` flag is what you want to know that the value has made it to disk and can be seen by a read. -Z [1]: https://github.com/basho/riak_kv/blob/master/src/riak_kv_vnode.erl#L284
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