On Mon, Jul 25, 2011 at 6:41 PM, aaron morton wrote:
> There are no hard and fast rules to add new nodes, but here are two
> guidelines:
>
> 1) Single node load is getting too high, rule of thumb is 300GB is probably
> too high.
What is that rule of thumb based on? I would guess that working se
There are no hard and fast rules to add new nodes, but here are two guidelines:
1) Single node load is getting too high, rule of thumb is 300GB is probably too
high.
2) There are times when the cluster cannot keep up with throughout, for example
the client is getting TimedOutExceptions or TPSta
as the wiki suggested:
http://wiki.apache.org/cassandra/LargeDataSetConsiderations
Adding nodes is a slow process if each node is responsible for a large
amount of data. Plan for this; do not try to throw additional hardware
at a cluster at the last minute.
I really would like to know what's the
I am using normal SATA disk, actually I was worrying about whether it
is okay if every time cassandra using all the io resources?
further more when is the good time to add more nodes when I was just
using normal SATA disk and with 100r/s it could reach 100 %util
how large the data size it sho
t; From: Jonathan Ellis [mailto:jbel...@gmail.com]
> Sent: Saturday, July 23, 2011 5:05 PM
> To: user@cassandra.apache.org
> Subject: Re: do I need to add more nodes? minor compaction eat all IO
>
> On Sat, Jul 23, 2011 at 4:16 PM, Francois Richard wrote:
>> My understanding is
-Original Message-
From: Jonathan Ellis [mailto:jbel...@gmail.com]
Sent: Saturday, July 23, 2011 5:05 PM
To: user@cassandra.apache.org
Subject: Re: do I need to add more nodes? minor compaction eat all IO
On Sat, Jul 23, 2011 at 4:16 PM, Francois Richard wrote:
> My understanding is that dur
On Sat, Jul 23, 2011 at 4:16 PM, Francois Richard wrote:
> My understanding is that during compaction cassandra does a lot of non
> sequential readsa then dumps the results with a big sequential write.
Compaction reads and writes are both sequential, and 0.8 allows
setting a MB/s to cap compacti
From: Yan Chunlu [mailto:springri...@gmail.com]
Sent: Saturday, July 23, 2011 9:16 AM
To: cassandra-u...@incubator.apache.org
Subject: do I need to add more nodes? minor compaction eat all IO
I have three nodes and RF=3, every time it is do minor compaction, the cpu
load(8 core) get to >30, and
I have three nodes and RF=3, every time it is do minor compaction, the
cpu load(8 core) get to >30, and iostat -x 2 shows utils is 100%, is
that means I need more nodes? the total data size is <60G
thanks!
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