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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Multiple DataFileDirectorie and disk failure
Date Mon, 21 Dec 2009 15:40:27 GMT
On Mon, Dec 21, 2009 at 2:37 AM,  <mail.list.steel.mental@gmail.com> wrote:
> 1.       How does SStables of one key-space distribute among multiple data
> directory?(what distribute policy?)

round-robin

> 2.       What fault-tolerant policy does cassandra utilize to against disk
> failure?

node-level replication

> 3.       If one disk down, What impact does one key-space have on reading
> and writing?(does whole key-space become unavailable?)

no, but you should run nodeprobe repair to re-replicate the data from
the dead disk to good ones.

-Jonathan

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