Hi Andrei, Hi Nicolai,
Which version of C* are you using ?
There are some recommendations about the max storage per node :
http://www.datastax.com/dev/blog/performance-improvements-in-cassandra-1-2
For 1.0 we recommend 300-500GB. For 1.2 we are looking to be able to
handle 10x
(3-5TB).
I have
Hi Jean-Armel, Nikolai,
1. Increasing sstable size doesn't work (well, I think, unless we
overscale - add more nodes than really necessary, which is
prohibitive for us in a way). Essentially there is no change. I gave
up and will go for STCS;-(
2. We use 2.0.11 as of now
3. We are running on EC2
If you are that write-heavy you should definitely go with STCS, LCS
optimizes for reads by doing more compactions
/Marcus
On Tue, Nov 25, 2014 at 11:22 AM, Andrei Ivanov aiva...@iponweb.net wrote:
Hi Jean-Armel, Nikolai,
1. Increasing sstable size doesn't work (well, I think, unless we
Yep, Marcus, I know. It's mainly a question of cost of those extra x2
disks, you know. Our final setup will be more like 30TB, so doubling
it is still some cost. But i guess, we will have to live with it
On Tue, Nov 25, 2014 at 1:26 PM, Marcus Eriksson krum...@gmail.com wrote:
If you are that
Hi Jean-Armel,
I am using latest and greatest DSE 4.5.2 (4.5.3 in another cluster but
there are no relevant changes between 4.5.2 and 4.5.3) - thus, Cassandra
2.0.10.
I have about 1,8Tb of data per node now in total, which falls into that
range.
As I said, it is really a problem with large
Nikolai,
Just in case you've missed my comment in the thread (guess you have) -
increasing sstable size does nothing (in our case at least). That is,
it's not worse but the load pattern is still the same - doing nothing
most of the time. So, I switched to STCS and we will have to live with
extra
Andrei,
Oh, yes, I have scanned the top of your previous email but overlooked the
last part.
I am using SSDs so I prefer to put extra work to keep my system performing
and save expensive disk space. So far I've been able to size the system
more or less correctly so these LCS limitations do not
Ah, clear then. SSD usage imposes a different bias in terms of costs;-)
On Tue, Nov 25, 2014 at 9:48 PM, Nikolai Grigoriev ngrigor...@gmail.com wrote:
Andrei,
Oh, yes, I have scanned the top of your previous email but overlooked the
last part.
I am using SSDs so I prefer to put extra work
YA NO QUIERO MAS MAILS SOY DE MEXICO
De: Nikolai Grigoriev [mailto:ngrigor...@gmail.com]
Enviado el: sábado, 22 de noviembre de 2014 07:13 p. m.
Para: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
Stephane,
As everything good
: Nikolai Grigoriev [mailto:ngrigor...@gmail.com]
Enviado el: sábado, 22 de noviembre de 2014 07:13 p. m.
Para: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
Stephane,
As everything good, LCS comes at certain price.
LCS will put most load on you
...@gmail.com]
Enviado el: sábado, 22 de noviembre de 2014 07:13 p. m.
Para: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
Stephane,
As everything good, LCS comes at certain price.
LCS will put most load on you I/O system (if you use
: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
Stephane,
As everything good, LCS comes at certain price.
LCS will put most load on you I/O system (if you use spindles -
you
may need
to be careful about that) and on CPU
.
Para: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
Stephane,
As everything good, LCS comes at certain price.
LCS will put most load on you I/O system (if you use spindles -
you
may need
to be careful
Strategy guidance
Importancia: Alta
Stephane,
As everything good, LCS comes at certain price.
LCS will put most load on you I/O system (if you use spindles -
you
may need
to be careful about that) and on CPU. Also LCS (by default) may
fall
back
On Mon, Nov 24, 2014 at 6:48 AM, Nikolai Grigoriev ngrigor...@gmail.com
wrote:
One of the obvious recommendations I have received was to run more than
one instance of C* per host. Makes sense - it will reduce the amount of
data per node and will make better use of the resources.
This is
wrote:
ABUSE
YA NO QUIERO MAS MAILS SOY DE MEXICO
De: Nikolai Grigoriev [mailto:ngrigor...@gmail.com]
Enviado el: sábado, 22 de noviembre de 2014 07:13 p. m.
Para: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
Stephane,
As everything good
de 2014 07:13 p. m.
Para: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
Stephane,
As everything good, LCS comes at certain price.
LCS will put most load on you I/O system (if you use spindles - you may
need
to be careful about
, Servando Muñoz G. smg...@gmail.com
wrote:
ABUSE
YA NO QUIERO MAS MAILS SOY DE MEXICO
De: Nikolai Grigoriev [mailto:ngrigor...@gmail.com]
Enviado el: sábado, 22 de noviembre de 2014 07:13 p. m.
Para: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
. smg...@gmail.com
wrote:
ABUSE
YA NO QUIERO MAS MAILS SOY DE MEXICO
De: Nikolai Grigoriev [mailto:ngrigor...@gmail.com]
Enviado el: sábado, 22 de noviembre de 2014 07:13 p. m.
Para: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
Stephane,
As everything good, LCS comes at certain price.
LCS will put most load on you I/O system (if you use spindles - you
may need
to be careful about that) and on CPU. Also LCS (by default) may fall
Hi there,
use case:
- Heavy write app, few reads.
- Lots of updates of rows / columns.
- Current performance is fine, for both writes and reads..
- Currently using SizedCompactionStrategy
We're trying to limit the amount of storage used during compaction. Should
we switch to
Stephane,
As everything good, LCS comes at certain price.
LCS will put most load on you I/O system (if you use spindles - you may
need to be careful about that) and on CPU. Also LCS (by default) may fall
back to STCS if it is falling behind (which is very possible with heavy
writing activity)
ABUSE
YA NO QUIERO MAS MAILS SOY DE MEXICO
De: Nikolai Grigoriev [mailto:ngrigor...@gmail.com]
Enviado el: sábado, 22 de noviembre de 2014 07:13 p. m.
Para: user@cassandra.apache.org
Asunto: Re: Compaction Strategy guidance
Importancia: Alta
Stephane,
As everything good, LCS comes
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