> the purpose of your thread is: How far are you away from being I/O
> bound (say in terms of % utilization - last column of iostat -x 1 -
> assuming you don't have a massive RAID underneath the block device)
No my cheap boss didn't want to by me a stack of these
http://www.ocztechnology.com/prod
> We are entirely IO-bound. What killed us last week were to many reads
> combined with flushes and compactions. Reducing compaction priority helped
> but it was not enough. Them main problem why we could not add nodes though
> had to do with the quorum reads we are doing:
I'm going to respond
On Dec 14, 2010, at 2:29 AM, Brandon Williams wrote:
> On Mon, Dec 13, 2010 at 6:43 PM, Daniel Doubleday
> wrote:
> Oh - well but I see that the coordinator is actually using its own score for
> ordering. I was only concerned that dropped messages are ignored when
> calculating latencies but
On Mon, Dec 13, 2010 at 6:43 PM, Daniel Doubleday
wrote:
> Oh - well but I see that the coordinator is actually using its own score
> for ordering. I was only concerned that dropped messages are ignored when
> calculating latencies but that seems to be the case for local or remote
> responses. And
On 13.12.10 21:15, Brandon Williams wrote:
On Sun, Dec 12, 2010 at 10:49 AM, Daniel Doubleday
mailto:daniel.double...@gmx.net>> wrote:
Hi again.
It would be great if someone could comment whether the following
is true or not.
I tried to understand the consequences of using
On Sun, Dec 12, 2010 at 10:49 AM, Daniel Doubleday wrote:
> Hi again.
>
> It would be great if someone could comment whether the following is true or
> not.
> I tried to understand the consequences of using
> |-Dcassandra.dynamic_snitch=true for the read path |and that's what I came
> up with:
>
Hi Peter
I should have started with the why instead of what ...
Background Info (I try to be brief ...)
We have a very small production cluster (started with 3 nodes, now we have 5).
Most of our data is currently in mysql but we want to slowly move the larger
tables which are killing our mysql
> 1) If using CL > 1 than using the dynamic snitch will result in a data read
> from node with the lowest latency (little simplified) even if the proxy node
> contains the data but has a higher latency that other possible nodes which
> means that it is not necessary to do load-based balancing on th
Hi again.
It would be great if someone could comment whether the following is true
or not.
I tried to understand the consequences of using
|-Dcassandra.dynamic_snitch=true for the read path |and that's what I
came up with:
1) If using CL > 1 than using the dynamic snitch will result in a dat
