I've been testing Cassandra - primarily looking at reads/second for our
fairly data model - one unique key with a row of columns that we always
request. I've now setup the cluster with with m1.large (2 cpus 8GB)
I had loaded a months worth of data in and was doing random requests as a
torture
Il 18.02.2012 09:51 francesco.tangari@gmail.com ha scritto:
i suppose that he should buy
http://shop.oreilly.com/product/0636920010852.do , to get an idea of
what cassandra can and what can't. that's my personal thinking.
I'have just bought this book:
considering your question: My question is, can also Cassandra split a query
over the cluster like
MapReduce? and knowing the answer... as said Don Smith i suppose you are at
first chapter of the book :)
--
francesco.tangari@gmail.com
Inviato con Sparrow
Perhaps your dataset can no longer be held in memory. Check iostats
Le 19 févr. 2012 11:24, Franc Carter franc.car...@sirca.org.au a écrit :
I've been testing Cassandra - primarily looking at reads/second for our
fairly data model - one unique key with a row of columns that we always
request.
Is there anything to do with running cassandra on a VMware ubuntu instance
!? I am trying Cassandra on VMware ubuntu server instance.
On Sun, Feb 19, 2012 at 2:45 AM, Aditya Gupta ady...@gmail.com wrote:
In my case, after installing cassandra, as soon as the server is started
it hangs on it
On Mon, Feb 20, 2012 at 4:10 AM, Philippe watche...@gmail.com wrote:
Perhaps your dataset can no longer be held in memory. Check iostats
I have been flushing the keycache and dropping the linux disk caches before
each to avoid testing memory reads.
One possibility that I thought of is that
I know the hard limit is 2 billion columns per row. My question is at what
size it will slowdown read/write performance and maintenance. The blog I
reference said the row size should be less than 10MB.
A look at read performance with different row sizes….
If you run a manual compaction with nodetool each CF will be compacted to a
single SSTable.
Not that this is not normally recommended as it means that automatic compaction
will take a long time to get to the file.
Take a look at nodetool cfhistograms to get an idea of how spread out your
Aside from iostats..
nodetool cfstats will give you read and write latency for each CF. This is the
latency for the operation on each node. Check that to see if latency is
increasing.
Take a look at nodetool compactionstats to see if compactions are running at
the same time. The IO is
On 19/02/2012 21:55, Aditya Gupta wrote:
Is there anything to do with running cassandra on a VMware ubuntu
instance !? I am trying Cassandra on VMware ubuntu server instance.
I am doing that for the past couple of weeks both on VMWare player and
on ESXi in development and it works fine.
My
Il 19/02/2012 14:51, francesco.tangari@gmail.com ha scritto:
considering your question: My question is, can also Cassandra split a
query over the cluster like
MapReduce? and knowing the answer... as said Don Smith i suppose you
are at first chapter of the book :)
Yes, it is true, before
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