Thanks for the clarifications..
On Mon, Feb 14, 2011 at 6:13 PM, Sylvain Lebresne wrote:
> On Mon, Feb 14, 2011 at 11:27 AM, Aditya Narayan wrote:
>
>> Thanks Sylvain,
>>
>> I guess I might have misunderstood the meaning of column_index_size_in_kb,
>> My previous understanding about that was: it
On Mon, Feb 14, 2011 at 11:27 AM, Aditya Narayan wrote:
> Thanks Sylvain,
>
> I guess I might have misunderstood the meaning of column_index_size_in_kb,
> My previous understanding about that was: it is the threshold size for a row
> to pass, after which its columns will be indexed.
>
It is the
Thanks Sylvain,
I guess I might have misunderstood the meaning of column_index_size_in_kb,
My previous understanding about that was: it is the threshold size for a row
to pass, after which its columns will be indexed.
If I have understood it correctly, it implies the size of the "blocks
(containi
As said by aaron, if the whole row is under 64k, it won't matter. But since
you spoke of very wide row, I'll assume the whole will be much more than
64k.
If so, the row is indexed by block (of 64k, configurable). Then the read
performance depends on how many of those block are needed for the query
AFAIK yes.
Until your row is column_index_size_in_kb in size (and in some circumstances a
compaction must have run) the code has to scan through all of the columns in
the row to find the 150-200 you want.
From the help in cassandra.yaml
# Add column indexes to a row after its contents reach t
Jonathan,
If I ask for around 150-200 columns (totally random not sequential) from a
very wide row that contains more than a million or even more columns then,
is the read performance of the SliceQuery operation affected by or "depends
on the length of the row" ?? (For my use case, I would use the
On Sun, Feb 13, 2011 at 12:37 AM, E S wrote:
> I've gotten myself really confused by
> http://wiki.apache.org/cassandra/ArchitectureInternals and am hoping someone
> can
> help me understand what the io behavior of this operation would be.
>
> When I do a get_slice for a column range, will it see
I've gotten myself really confused by
http://wiki.apache.org/cassandra/ArchitectureInternals and am hoping someone
can
help me understand what the io behavior of this operation would be.
When I do a get_slice for a column range, will it seek to every SSTable? I had
thought that it would use t
