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Posted to commits@cassandra.apache.org by "Patrick Bannister (JIRA)" <ji...@apache.org> on 2018/04/01 01:51:00 UTC
[jira] [Commented] (CASSANDRA-13889) cfstats should take sorting
and limit parameters
[ https://issues.apache.org/jira/browse/CASSANDRA-13889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16421554#comment-16421554 ]
Patrick Bannister commented on CASSANDRA-13889:
-----------------------------------------------
I'm thinking that command line usage should support sort keys corresponding to the keys used in the TableStatsHolder convert2Map function. They're more verbose than I'd like, but I felt that creating a whole new nomenclature was the worse choice.
However, I am supporting a few alternative short forms for keys I expect to get common use:
* "read_latency" as a short form of "local_read_latency_ms"
* "reads" as a short form of "local_read_count"
* "write_latency" as a short form of "local_write_latency_ms"
* "writes" as a short form of "local_write_count"
I cringe a bit at "average_live_cells_per_slice_last_five_minutes", but I also didn't want to blow up the command line usage hint with alternate short forms of every key.
> cfstats should take sorting and limit parameters
> ------------------------------------------------
>
> Key: CASSANDRA-13889
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13889
> Project: Cassandra
> Issue Type: Improvement
> Components: Tools
> Reporter: Jon Haddad
> Assignee: Patrick Bannister
> Priority: Major
> Fix For: 4.0
>
> Attachments: sample_output_normal.txt, sample_output_sorted.txt, sample_output_sorted_top3.txt
>
>
> When looking at a problematic node I'm not familiar with, one of the first things I do is check cfstats to identify the tables with the most reads, writes, and data. This is fine as long as there aren't a lot of tables but once it goes above a dozen it's quite difficult. cfstats should allow me to sort the results and limit to top K tables.
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