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InfluxDB - a distributed events and time series...
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Paul Dix
April 27, 2014
Technology
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InfluxDB - a distributed events and time series database
Slides from my lightning talk at the GopherCon pre-party.
Paul Dix
April 27, 2014
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Transcript
InfluxDB - a distributed time series, metrics, and events database
Paul Dix paul@influxdb.com @pauldix @influxdb
YC (W13), 3 people full time: Todd Persen John Shahid
Paul Dix (me)
What it’s for…
Metrics
Time Series
Analytics
Events
Can’t you just use a regular DB?
order by time?
Doesn’t Scale
Example from metrics: ! 100 measurements per host * 10
hosts * 8640 per day (once every 10s) * 365 days ! = 3,153,600,000 records per year
Have fun with that table…
But wait, we’ll just keep the summaries!
1h averages = ! 8,760,000 per year
Lose Detail and AdHoc Queryability
So let’s use Cassandra, HBase, or Scaleasaurus!
Too much application code and complexity
Application logic and scripts to compute summaries
Application level logic for balancing
No data locality for AdHoc queries
And then there’s more…
Web services
Libraries for web services
Data collection
Visualization
–Paul Dix “Building an application with an analytics component today
is like building a web application in 1998. You spend months building infrastructure before getting to the actual thing you want to build.”
Analytics should be about analyzing and interpreting data, not the
infrastructure to store and process it.
None
HTTP API Web services built in
HTTP API (writes) curl -X POST \ 'http://localhost:8086/db/mydb/series?u=paul&p=pass' \ -d
'[{"name":"foo", "columns":["val"], "points": [[3]]}]'
Data (with timestamp) [ { "name": "cpu", "columns": ["time", "value",
"host"], "points": [ [1395168540, 56.7, "foo.influxdb.com"], [1395168540, 43.9, "bar.influxdb.com"] ] } ]
HTTP API (queries) curl 'http://localhost:8086/db/mydb/series?u=paul&p=pass&q=.'
SQL-ish select * from events where time > now() -
1h
SQL-ish select * from “series with weird chars ()*@#0982#$” where
time > now() - 1h
Where Regex select line from application_logs where line =~ /.*ERROR.*/
and time > "2014-03-01" and time < "2014-03-03"
Only scans the time range Series and time are the
primary index
Work with many series…
Select from Regex select * from /stats\.cpu\..*/ limit 1
Downsampling on the fly…
Aggregates select percentile(90, value) from response_times group by time(10m) where
time > now() - 1d
Continuous Downsampling…
Continuous queries (summaries) select count(page_id) from events group by time(1h),
page_id into events.[page_id]
Series per page id select count from events.67 where time
> now() - 7d
Continuous queries (regex downsampling) select percentile(value, 90) as value from
/stats\.*/ group by time(5m) into percentile.90.:series_name
Percentile series per host select value from percentile.90.stats.cpu.host1 where time
> now() - 4h
Denormalization for performance
Range scans all user events for last hour select *
from events where user_id = 3 and time > now() - 1h
Continuous queries (fan out) select * from events into events.[user_id]
Series per user id select * from events.3 where time
> now() - 1h
Distributed Scale out, data locality, high availability
Raft for metadata We owe Ben Johnson a beer or
three…
Protobuf + TCP for queries, writes
Scalable Have billions of points in 1 series* or a
million different series
Libraries Go, Ruby, Javascript, Python, Node.js, Clojure, Java, Perl, Haskell,
R, Scala, CLI (ruby and node)
Visualization
Built-in UI
Grafana
Javascript library + D3, HighCharts, Rickshaw, NVD3, etc. Definitely more
to do here!
Data Collection CollectD Proxy, StatsD backend, Carbon ingestion, OpenTSDB (soon)
Coming Soon
ugh, Documentation
Series Metadata
Binary Protocol
Pubsub select * from some_series where host = “serverA” into
subscription() select percentile(90, value) from some_series group by time(1m) into subscription()
Custom Functions select myFunc(value) from some_series
Rack aware sharding and querying
Multi-datacenter replication Push and bi-directional
Indexes?
Ponies? Tell @jvshahid that you want your pony ;)
But it’s ready to go now. Production deployments already running.
Need help? support@influxdb.com Thanks! paul@influxdb.com @pauldix