Yes, that's exactly so. I have no need for multiple DataFileDirectories,
except that it was a convenient way to test the hypothesis that the
performance bottleneck I was experiencing due to writing only one
sstable to disk at once could be solved by increasing the queue size for
the writer (the
> "A number of people have experienced lose from using multiple
> DataFileDirectories, and to my knowledge no one has experienced win
> from doing so."
I presume that's disk space reasons.
> Do you have an actual use case for this functionality in which you
> experience win?
I understood his use
On 1/18/11, Andy Burgess wrote:
> Sorry for the delayed reply, but thanks very much - this pointed me at
> the exact problem. I found that the queue size here was equal to the
> number of configured DataFileDirectories, so a good test was to lie to
> Cassandra and claim that there were more DataFi
> Sorry for the delayed reply, but thanks very much - this pointed me at the
> exact problem. I found that the queue size here was equal to the number of
> configured DataFileDirectories, so a good test was to lie to Cassandra and
> claim that there were more DataFileDirectories than I needed. Inte
Sorry for the delayed reply, but thanks very much - this pointed me at
the exact problem. I found that the queue size here was equal to the
number of configured DataFileDirectories, so a good test was to lie to
Cassandra and claim that there were more DataFileDirectories than I
needed. Interest
Filed: https://issues.apache.org/jira/browse/CASSANDRA-1955
--
/ Peter Schuller
[multiple active cf;s, often triggering flush at the same time]
> Can anyone confirm whether or not this behaviour is expected, and
> suggest anything that I could do about it? This is on 0.6.6, by the way.
> Patched with time-to-live code, if that makes a difference.
I looked at the code (trunk
Hi,
I have a performance problem related to my use of multiple
ColumnFamilies. Maybe there's a better way to represent my data such
that I don't hit this problem, I don't know, but as things stand, I'm
putting data into each ColumnFamily at a rate which is more-or-less the
same for each. This mea
