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*发件人：* sharanabasava raddi
*发送时间：* 2010-05-25 13:46:38
*收件人：* user@cassandra.apache.org
*抄送：*
*主题：* Why Cassandra is space inefficient compared to MySQL?
Hi all,
Am running Cassandra on Windows XP (single node) machine.
I have made insertion of about 10 million
Could you please tell me why?
There might be pending sstable removals on disk, which won't happen
until GC or restart. If you just did a bulk insert and checked
diskspace immediately afterwards, I think this is a possible
explanation.
(See Write path on
Hi Peter,
Thanks a lot.
Regards,
Sharan
2010/5/25 Peter Schüller sc...@spotify.com
Could you please tell me why?
There might be pending sstable removals on disk, which won't happen
until GC or restart. If you just did a bulk insert and checked
diskspace immediately afterwards, I think
Also, timestamps for each column.
-ryan
On Tue, May 25, 2010 at 5:41 AM, Jonathan Ellis jbel...@gmail.com wrote:
That's true. But fundamentally Cassandra is expected to use more
space than mysql for a few reasons; usually the biggest factor is that
Cassandra has to write out each column name
My money is on the fact that the serializer is just horribly verbose. It's
using a basic set of the java serializer.
-Chris
On Tue, May 25, 2010 at 10:02 AM, Ryan King r...@twitter.com wrote:
Also, timestamps for each column.
-ryan
On Tue, May 25, 2010 at 5:41 AM, Jonathan Ellis
the only place we use a java serializer is for the BitSet in bloom filters.
On Tue, May 25, 2010 at 12:37 PM, Chris Goffinet goffi...@digg.com wrote:
My money is on the fact that the serializer is just horribly verbose. It's
using a basic set of the java serializer.
-Chris
On Tue, May 25,
On 2010-05-25, Jonathan Ellis jbel...@gmail.com wrote:
That's true. But fundamentally Cassandra is expected to use more
space than mysql for a few reasons; usually the biggest factor is that
Cassandra has to write out each column name in each row, since column
names are dynamic unlike in
Hi all,
Am running Cassandra on Windows XP (single node) machine.
I have made insertion of about 10 million records into Cassandra , and
it took around 90 minutes to insert and 8GB of space.
For the same number of records MySQL will take 3 GB space.
Could you please tell me why?
And please Give
