[
https://issues.apache.org/jira/browse/CASSANDRA-3589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13207466#comment-13207466
]
Peter Schuller commented on CASSANDRA-3589:
-------------------------------------------
I just realized something. I wasn't looking into this but had a separate
realization investigating streaming performance - ever since Cassandra moved to
single-pass streaming (CASSANDRA-2677) streaming easily becomes CPU bound. If
the "mpbs" numbers earlier in this ticket (35, 19) are mega*bytes*, the numbers
are well within what you might reasonably expect from being CPU bound. I have
yet to look into how the bulk loader stuff works, but is it possible it's going
through the same path, such that it's spending CPU time re-creating the sstable
on reception?
(This may be obvious to folks, I have actually never look at the bulk loader
support before.)
> Degraded performance of sstable-generator api and sstable-loader utility in
> cassandra 1.0.x
> -------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-3589
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3589
> Project: Cassandra
> Issue Type: Bug
> Components: Tools
> Affects Versions: 1.0.0
> Reporter: Samarth Gahire
> Priority: Minor
>
> we are using Sstable-Generation API and Sstable-Loader utility.As soon as
> newer version of cassandra releases I test them for sstable generation and
> loading for time taken by both the processes.Till cassandra 0.8.7 there is no
> significant change in time taken.But in all cassandra-1.0.x i have seen 3-4
> times degraded performance in generation and 2 times degraded performance in
> loading.Because of this we are not upgrading the cassandra to latest version
> as we are processing some TeraBytes of data everyday time taken is very
> important.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
