Guys, no point in sending RedMine links to dev list, as it is not public
On Fri, May 10, 2013 at 12:24 PM, Bhathiya Jayasekara <[email protected]>wrote: > Hi Paul, > > I had a little research on availability of latency statistics. There are 2 > types of latency values which can be retrieved from Cassandra jmx mbeans. > > 1) Read/write latency for keyspaces > 2) Read/write latency for column families > > The first one is calculated by (total time spent for requests *since > server started*)/(number of requests *since server started*), > > and the second one is calculated by (total time spent for requests *since > last call to jmx mbean*)/(number of requests *since last call to jmx mbean > *). > > So, to have an average value for latency, it seems the first one is more > suitable. So I'm going to use those values as latency. Since I have > read/write counts as well, average latency for whole system can be > calculated. > > Thanks. > > > > On Thu, May 9, 2013 at 3:52 PM, Paul Fremantle <[email protected]> wrote: > >> Very nice. Is there any way we can get average ms per read and write? I >> know that is important to many users. >> >> Paul >> >> >> On 9 May 2013 11:07, Bhathiya Jayasekara <[email protected]> wrote: >> >>> Hi Prabath, >>> >>> As you suggested, I wrote a simple table gadget to show other relevant >>> statistics too. Comments are welcome. >>> >>> I'm attaching screenshots of the gadgets herewith. >>> >>> Thanks. >>> >>> >>> On Thu, May 9, 2013 at 11:22 AM, Prabath Abeysekera >>> <[email protected]>wrote: >>> >>>> Hi Bhathiya, >>>> >>>> On Thu, May 9, 2013 at 10:10 AM, Bhathiya Jayasekara <[email protected] >>>> > wrote: >>>> >>>>> Hi devs, >>>>> >>>>> I started working on [1] few weeks back. The initial milestone is to >>>>> implement Cassandra data publishing, analyzing and monitoring part. The >>>>> billing task will be done later. Currently I have completed Cassandra disk >>>>> space usage and node status monitoring implementation. So with this now, >>>>> Cassandra disk space usages can be monitored in different time periods >>>>> such >>>>> as "in last hour", "in last day", "in last week" and in "last month". >>>>> >>>>> In addition to disk space usage, other statistics such as >>>>> sstablecount, read and write counts etc. are also published and analyzed >>>>> now, and can be added to monitoring dashboard if required. (Need to write >>>>> gadgets accordingly) >>>>> >>>> >>>> Good work. Please attach a few screenshots of the available dashboard >>>> artifacts you've come up with too. Also, I believe, if possible, writing a >>>> few other gadgets to display the information on read/write counts, >>>> latency, sstablecounts, etc too would be helpful to make it a more complete >>>> toolbox. (Referring your mail, I hope it's going to be straightforward as >>>> the necessary information is already available.) >>>> >>>> >>>>> >>>>> Currently data publishing and viewing is available for super tenant >>>>> only, and I'm planning to extend it to tenant level. >>>>> >>>>> [1] https://redmine.wso2.com/issues/1163 >>>>> >>>>> >>>>> Thanks. >>>>> >>>>> -- >>>>> *Bhathiya Jayasekara* >>>>> *Software Engineer,* >>>>> *WSO2 inc., http://wso2.com* >>>>> * >>>>> * >>>>> *Phone: +94715478185* >>>>> *LinkedIn: http://www.linkedin.com/in/bhathiyaj* >>>>> *Twitter: https://twitter.com/bhathiyax* >>>>> >>>>> _______________________________________________ >>>>> Dev mailing list >>>>> [email protected] >>>>> http://wso2.org/cgi-bin/mailman/listinfo/dev >>>>> >>>>> >>>> >>>> Regards, >>>> Prabath >>>> -- >>>> Prabath Abeysekara >>>> Email: [email protected] <[email protected]> >>>> Mobile: +94774171471 >>>> >>>> <http://harshana05.blogspot.com/> >>>> >>> >>> >>> >>> -- >>> *Bhathiya Jayasekara* >>> *Software Engineer,* >>> *WSO2 inc., http://wso2.com* >>> * >>> * >>> *Phone: +94715478185* >>> *LinkedIn: http://www.linkedin.com/in/bhathiyaj* >>> *Twitter: https://twitter.com/bhathiyax* >>> >>> _______________________________________________ >>> Dev mailing list >>> [email protected] >>> http://wso2.org/cgi-bin/mailman/listinfo/dev >>> >>> >> >> >> -- >> Paul Fremantle >> CTO and Co-Founder, WSO2 >> OASIS WS-RX TC Co-chair, VP, Apache Synapse >> >> UK: +44 207 096 0336 >> US: +1 646 595 7614 >> >> blog: http://pzf.fremantle.org >> twitter.com/pzfreo >> [email protected] >> >> wso2.com Lean Enterprise Middleware >> >> Disclaimer: This communication may contain privileged or other >> confidential information and is intended exclusively for the addressee/s. >> If you are not the intended recipient/s, or believe that you may have >> received this communication in error, please reply to the sender indicating >> that fact and delete the copy you received and in addition, you should not >> print, copy, retransmit, disseminate, or otherwise use the information >> contained in this communication. Internet communications cannot be >> guaranteed to be timely, secure, error or virus-free. The sender does not >> accept liability for any errors or omissions. >> > > > > -- > *Bhathiya Jayasekara* > *Software Engineer,* > *WSO2 inc., http://wso2.com* > * > * > *Phone: +94715478185* > *LinkedIn: http://www.linkedin.com/in/bhathiyaj* > *Twitter: https://twitter.com/bhathiyax* > > _______________________________________________ > Dev mailing list > [email protected] > http://wso2.org/cgi-bin/mailman/listinfo/dev > >
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