Many thanks for information Dennis and Karl. I don’t think I can test until Monday, but I will let you know what (hopefully) works.
Regards Nigel From: d...@aegisco.com [mailto:d...@aegisco.com] Sent: 17 December 2014 22:31 To: user@cassandra.apache.org Subject: Re: Cassandra metrics & Graphite Hi Nigel, I'm using Casssandra 2.0.7 and in Cassandra lib directory, I'm dropping in this reporter jar: http://search.maven.org/#artifactdetails|com.yammer.metrics|metrics-graphite|2.2.0|jar My cass metrics are flowing in properly into Graphite 0.9.10. Here's my metrics yaml: graphite: - period: 10 timeunit: 'SECONDS' hosts: - host: <%= @graphite_ip %> port: 2003 predicate: color: "white" useQualifiedName: true patterns: - "^org.apache.cassandra.metrics.Cache.+" - "^org.apache.cassandra.metrics.ClientRequest.+" - "^org.apache.cassandra.metrics.Storage.+" - "^org.apache.cassandra.metrics.ThreadPools.+" prefix: "servers.<%= hostname %>" HTH, -Dennis On Wed, Dec 17, 2014 at 9:16 AM, Karl Rieb <karl.r...@gmail.com<mailto:karl.r...@gmail.com>> wrote: This seemed to be due to a bug with how metric names are converted to file system paths. os.path.join() is used, but the metric path converts into an absolute path (e.g /org/apache/cassandra). This means you end up doing something like: os.path.join('/opt/graphite/storage/whatever', '/org/apache/cassandra/etc') the metric name gets converted to a path by replacing all dots with slashes. I just manually tweaked the Python code to strip any leading dots from the metric name as a temporary workaround. -Karl > On Dec 17, 2014, at 11:04 AM, Nigel LEACH > <nigel.le...@uk.bnpparibas.com<mailto:nigel.le...@uk.bnpparibas.com>> wrote: > > I'm running Cassandra Cassandra 2.0.11.83 (via DSE 4.6.0), and Graphite > 0.9.10. I know a bit about Cassandra, but not much about Graphite. > > Our Graphite server exposes system metrics, and also those from the example > python scripts, successfully. > > I can see Cassandra metrics hitting the Graphite server, but in the console > log, errors suggest they are attempting to load in to the root file system > > exceptions.IOError: [Errno 2] No such file or directory: > '/org/apache/cassandra/metrics/ColumnFamily/system/sstable_activity/WriteTotalLatency/count.wsp' > > Whereas, I think, it should be going to something like this > > /var/lib/carbon/whisper/carbon/agents/org/apache/cassandra/metrics/ColumnFamily/system/sstable_activity/WriteTotalLatency/count.wsp' > > I'm losing the prefix directory path somewhere, but don't know where to > configure it. > > On the Cassandra side all I have added is a call to metricsGraphite.yaml, > which contains > > graphite: > - > period: 60 > timeunit: 'SECONDS' > hosts: > - host: '10.11.12.13' > port: 2003 > predicate: > color: "white" > useQualifiedName: true > patterns: > - "^org.apache.cassandra.metrics.+" > > On the Graphite side I simply have the following in Carbons' > storage-schemas.conf file > > [cassandra] > pattern=cassandra > retentions = 60:90d > > Any hints to what is going wrong? > > Many Thanks > Nigel > > > ___________________________________________________________ > This e-mail may contain confidential and/or privileged information. If you > are not the intended recipient (or have received this e-mail in error) please > notify the sender immediately and delete this e-mail. Any unauthorised > copying, disclosure or distribution of the material in this e-mail is > prohibited. > > Please refer to http://www.bnpparibas.co.uk/en/email-disclaimer/ for > additional disclosures. > ___________________________________________________________ This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and delete this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is prohibited. Please refer to http://www.bnpparibas.co.uk/en/email-disclaimer/ for additional disclosures.
