Micro services or monolith in a reactive low latency java applications
Enabling Java applications for low-latency use cases at ... a… · Enabling Java applications for...
Transcript of Enabling Java applications for low-latency use cases at ... a… · Enabling Java applications for...
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Enabling Java applications for low-latency use cases at scale with Azul Zing and GridGain
Gil TeneCTO & Co-Founder
Azul Systems
Denis MagdaVP, Product Management
GridGain Systems
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10 Mins That Saved Southwest Airlines
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Apps That Require Much Lower Latency
Payments Processing
Latency: 20 - 200 ms
Electronic Trading
Latency: 20 - 100s μs
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Garbage Collection Might Make Things Unpredictable
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Unless You Select The Right Java Stack
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Azul Zing - Java without the pauses
Click to add text
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©2017 Azul Systems, Inc.
An overview of Zing
Gil Tene, CTO & co-Founder, Azul Systems
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This is <Your App> on HotSpot
This is <Your App> on Zing
Any Questions?
A simple visual summary
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©2015 Azul Systems, Inc.
A JVM for Linux/x86 (servers, clouds, containers)
“Not just Fast. Always Fast.”
Improves application behavior metrics
Increases practical carrying capacity
Makes developers and their managers happier
Delivers a continuously responsive execution platform
ELIMINATES Garbage Collection as a concern
Reduces negative impacts of frequent code deployment
VERY wide operating range
from GBs to TBs, from low latency to streaming and batch
Zing
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Areas where Zing shines
Wherever speed & responsiveness matter:
Human response times…
Machine-to-machine “stuff”…
“Low latency” or “Latency Sensitive"…
“Large” data and in-memory analytics…
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Zing shines in Java based infrastructure…
CassandraSolr
Elastic
LuceneKafka
HBase ZookeeperFlink
Pinot
…
…
…
Aeron
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Spark
……
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GridGainIgnite
HDFS
…
Storm
…
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Zing shines in Java applications
API Gateways Applicationcontainers
Back end
Front End
In memoryanalytics
…
…
Streamingapplications
……
… …
…
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Zing’s main feature areas
C4: GC, solved.
Falcon: Powerful JIT compiler. Speed.
ReadyNow: Warmup/Startup. DevOps.
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Speed
What is it good for?
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Are you fast?
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Are you fast when new code rolls out?
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Are you fast when it matters?
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Are you fast at Market Open?
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Are you reliably fast?
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??
What does being “fast” mean?
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What does being “fast” mean?
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Speed in the Java world…
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Interpreted
Tier 1(profiling) Optimized
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Falcon
Falcon is basically about speed
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FalconReadyNow
ReadyNow is focused on warmup
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FalconReadyNow
C4
C4 takes out the stalls
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FalconReadyNow
C4
Start Fast, Go Fast, Stay Fast
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GC Tuning
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©2015 Azul Systems, Inc.
Java GC tuning is “hard”…
Examples of actual command line GC tuning parameters:Java -Xmx12g -XX:MaxPermSize=64M -XX:PermSize=32M -XX:MaxNewSize=2g
-XX:NewSize=1g -XX:SurvivorRatio=128 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:MaxTenuringThreshold=0-XX:CMSInitiatingOccupancyFraction=60 -XX:+CMSParallelRemarkEnabled-XX:+UseCMSInitiatingOccupancyOnly -XX:ParallelGCThreads=12 -XX:LargePageSizeInBytes=256m …
Java –Xms8g –Xmx8g –Xmn2g -XX:PermSize=64M -XX:MaxPermSize=256M-XX:-OmitStackTraceInFastThrow -XX:SurvivorRatio=2 -XX:-UseAdaptiveSizePolicy -XX:+UseConcMarkSweepGC -XX:+CMSConcurrentMTEnabled-XX:+CMSParallelRemarkEnabled -XX:+CMSParallelSurvivorRemarkEnabled-XX:CMSMaxAbortablePrecleanTime=10000 -XX:+UseCMSInitiatingOccupancyOnly-XX:CMSInitiatingOccupancyFraction=63 -XX:+UseParNewGC –Xnoclassgc …
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A few more GC tuning flags
Source: Word Cloud created by Frank Pavageau in his Devoxx FR 2012 presentation titled “Death by Pauses”
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The complete guide tomodern GC tuning**
java -Xmx40gjava -Xmx20gjava -Xmx10g
java -Xmx5g
** It’s 2019, Zing is widely available. Tweaking 10s of GC flags is a thing of the past.
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Cassandra under heavy load, Intel E5-2690 v4 server
Yup, that’s the 1 msec mark
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A real world use case with In Memory Computing:
GridGain in a Credit Card payments processing application
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Payments Benchmark: Configuration
! 3 nodes GridGain cluster○ 3 x AWS i3en.6xlarge○ 72 cores○ 600 GB RAM and 45 TB disk
! Tested Scenarios○ Azul Zing C4 vs. OpenJDK G1 for○ 100% in RAM, no disk (200 GB)○ 100% in RAM, 100% on disk (200 GB)○ 30% in RAM, 100% on disk (600 GB)
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Payments Benchmark: Workload
! Each transactions accesses 20 records! Distributed Transactional Reads
○ Target throughput - 1000 reads/sec○ Target latency - 15ms for 99.99th percentile
! Distributed Transactional Updates○ Target throughput - 2000 updates/sec○ Target latency - 50ms for 99.99th percentile○ RAM and disk have to be updated for primary and backup copies
! Metrics Collection ○ Micrometer and jHiccup○ 2 hours run
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Transactional Reads100% in RAM (200 GB)
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Transactional Reads100% in RAM (200 GB) [equalized scale]
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- target latency
Transactional Reads100% in RAM (200 GB) [equalized scale]
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Transactional Updates:100% in RAM (200 GB)
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Transactional Updates100% in RAM (200 GB) [equalized scale]
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- target latency
Transactional Updates100% in RAM (200 GB) [equalized scale]
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Transactional Reads With Persistence100% in RAM, 100% on Disk (200 GB)
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Transactional Reads With Persistence100% in RAM, 100% on Disk (200 GB) [equalized scale]
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- target latency
Transactional Reads With Persistence100% in RAM, 100% on Disk (200 GB) [equalized scale]
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Transactional Updates With Persistence100% in RAM, 100% on Disk (200 GB)
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Transactional Updates With Persistence100% in RAM, 100% on Disk (200 GB) [equalized scale]
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- target latency
Transactional Updates With Persistence100% in RAM, 100% on Disk (200 GB) [equalized scale]
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GridGain - In-Memory Computing Platform That Scales
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GridGain Let’s Us Scale To TerabytesAcross RAM and Disk Space
Unlimited off-heap memoryand disk space for data
Java Heap for objects generated in runtime
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Transactional Persistence
! Distributed Persistence Tier○ Fully transactional and consistent○ No need to cache 100% of data in RAM○ No need to warm-up RAM on restarts
! Performance vs. Cost Tradeoff○ Cache more for fastest performance○ Cache less to reduce infrastructure costs
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Transactional Reads with Persistence30% in RAM, 100% on Disk (600 GB)
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Transactional Reads with Persistence30% in RAM, 100% on Disk (600 GB) [equalized scale]
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- target latency
Transactional Reads with Persistence30% in RAM, 100% on Disk (600 GB) [equalized scale]
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Transactional Updates with Persistence30% in RAM, 100% on Disk (600 GB)
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Transactional Updates with Persistence30% in RAM, 100% on Disk (600 GB) [equalized scale]
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- target latency
Transactional Updates with Persistence30% in RAM, 100% on Disk (600 GB) [equalized scale]
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Is Java Ready for Low-Latency Scenarios?
! Eliminate GC pauses with Azul Zing
! Scale Out with GridGain across RAM and Disk
! Select a configuration you need to meet infrastructure costs
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Q&A
Gil - @giltene
Denis - @denimagda