with Container-Native Storage MySQL performance on OpenShift · 2018-06-04 · MySQL performance on...
Transcript of with Container-Native Storage MySQL performance on OpenShift · 2018-06-04 · MySQL performance on...
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MySQL performance on OpenShift with Container-Native StorageRed Hat Storage Architecture Team
Daniel MesserTechnical Marketing Manager05/08/2018
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A primer on Container-Native StorageIn short: GlusterFS in pods, orchestrated by OpenShift + REST API
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A primer on Container-Native StorageIn short: GlusterFS in pods, orchestrated by OpenShift + REST API
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A primer on Container-Native StorageIn short: GlusterFS in pods, orchestrated by OpenShift + REST API
CONTAINERIZED RED HAT GLUSTER
STORAGE
RHEL HOST OS
RED HATGLUSTER POD
GLUSTER VOLUMES
PHYSICAL DISK
HOST NETWORK
POD
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A primer on Container-Native StorageIn short: GlusterFS in pods, orchestrated by OpenShift + REST API
CONTAINERIZED RED HAT GLUSTER
STORAGE
RHEL HOST OS
RED HATGLUSTER POD
GLUSTER VOLUMES
PHYSICAL DISK
HOST NETWORK
POD
HEKETIREST-FUL GLUSTERFS
MANAGEMENT
GLUSTERFS PODS
RED HATHEKETI POD
REST API
POD
INFRAPOD
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What do you get?In short: a transparently replicating FUSE mount inside a pod leveraging the GlusterFS protocol
sh-4.2$ df -hFilesystem Size Used Avail Use% Mounted onoverlay 20G 9.2G 11G 46% /tmpfs 1.9G 0 1.9G 0% /devtmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup/dev/xvdc 10G 41M 10G 1% /etc/hosts/dev/mapper/docker_vol-dockerlv 20G 9.2G 11G 46% /run/secretsshm 64M 0 64M 0% /dev/shm10.0.1.80:vol_4adefe9a8096eb80596ff561aff273d6 10G 223M 9.8G 3% /var/lib/mysql/datatmpfs 1.9G 16K 1.9G 1% /run/secrets/kubernetes.io/serviceaccounttmpfs 1.9G 0 1.9G 0% /proc/scsitmpfs 1.9G 0 1.9G 0% /sys/firmware
sh-4.2$ mount | grep mysql10.0.1.80:vol_4adefe9a8096eb80596ff561aff273d6 on /var/lib/mysql/data type fuse.glusterfs ↵ (rw,relatime,user_id=0,group_id=0,default_permissions,allow_other,max_read=131072)
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Why is this a good idea?
Scalable (1000 PVs/cluster)
Highly-available (across cloud AZs)
Automated (Dynamic Provisioning)
Integrated (Installs with/runs on OpenShift)
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BUT WILL THIS RUN MYDATABASE?
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MOST POPULAR DATABASE ON OPENSHIFT ONLINE:
MYSQL
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sysbench?Well-known artificial benchmark for MySQL
Stresses the MySQL database engine using a set of predefined SELECT, UPDATE, INSERT and DELETE operations in a single table.
● Stresses IO and query processing subsystem● Does not involve application logic● Operates on a single table only, insert millions of rows
Verdict:
● Is not using a real world data model● Does not tell you anything about user/application-perceived performance
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DVDStore!A full stack database-centric benchmark: https://github.com/dvdstore
An open source benchmark tool simulating and e-commerce platform.
● Simulates users logging in, browsing product catalog, reading/writing reviews and place orders including think time
● Has application (PHP) code driving the database and rendering user interfaces● Fully normalized schema with several tables
Verdict:
● Represents a typical web application stack as they are found with many customers● Reports application/user perceived performance in Orders Per Minute (OPM)
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LEADING QUESTIONS:
❖ What is the recommended setup to achieve good performance?
❖ How many of these web application stacks can we run?
➢ within a target latency envelope (<700 ms)?
❖ How does workload and cluster performance scale as we increase load?
❖ Will this kind of workload need SSDs or HDDs?
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Infrastructure Setup
HPE ProLiant DL380 Gen9 LFF
HPE ProLiant DL380 Gen9 SFF
OpenShift Network (10 GbE)
Storage Network (10GbE)
VMware vSphere 6.0
• 2x Intel E5-2697A v4
• 256 GB of RAM
• 5x HGST Ultrastar SS200 1.9T
• HPE SmartHBA H240ar
• 2x Intel E5-2697 v4
• 256 GB of RAM
• 12x HGST Ultrastar He 10TB
• HPE SmartArray P440ar
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HDD Storage Nodes
OpenShift Infrastructure + Workers
OpenShift Setup OpenShift Network (10 GbE)
Storage Network (10GbE)
OpenShift Workers
VMware vSphere 6.0
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HDD Storage Nodes
OpenShift Infrastructure + Workers
OpenShift Setup (HDD Test)OpenShift Network (10 GbE)
Storage Network (10GbE)
OpenShift Workers
OCP master
OCP master
OCP master
OCP infra
OCP infra
OCP infra
Utility
Grafana
HAProxy
OCP worker OCP worker
OCP worker OCP worker
OCP worker OCP worker
OCP worker OCP worker
OCP worker OCP worker
OCP worker OCP worker
CNS (Gluster)
CNS (Gluster)
CNS (Gluster)
VMware vSphere 6.0
Worker VM Specs:
• 12 vCPUs
• 96 GB of RAM
• 2x 10GbE NICs
Support VM Specs:
• 2 vCPUs
• 8 GB of RAM
Master VM Specs:
• 8 vCPUs
• 32 GB of RAM
• 2x 10GbE NICs
Infra VM Specs:
• 2 vCPUs
• 8 GB of RAM
5x LOAD5x LOAD5x LOAD
5x LOAD5x LOAD5x LOAD
5x LOAD5x LOAD5x LOAD
CNS VM Specs v1:
• 4 vCPUs
• 8 GB of RAM
CNS VM Specs v2:
• 16 vCPUs
• 32 GB of RAM
OCP worker
CNS (Gluster)
LOAD (Client)
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OpenShift Infrastructure + Workers
OpenShift Setup (SSD Test)OpenShift Network (10 GbE)
Storage Network (10GbE)
SSD Storage Nodes
OCP master
OCP master
OCP master
OCP infra
OCP infra
OCP infra
OCP worker OCP worker
OCP worker OCP worker
OCP worker OCP worker
CNS (Gluster)
CNS (Gluster)
CNS (Gluster)
VMware vSphere 6.0
Master VM Specs:
• 8 vCPUs
• 32 GB of RAM
• 2x 10GbE NICs
Infra VM Specs:
• 2 vCPUs
• 8 GB of RAM
5x LOAD5x LOAD5x LOAD
5x LOAD5x LOAD5x LOAD
5x LOAD5x LOAD5x LOAD
OCP worker
CNS (Gluster)
LOAD (Client)
OpenShift Worker Nodes
Utility
Grafana
HAProxy
OCP worker OCP worker
OCP worker OCP worker
OCP worker OCP worker
CNS VM Specs v1:
• 4 vCPUs
• 8 GB of RAM
CNS VM Specs v2:
• 16 vCPUs
• 32 GB of RAM
Worker VM Specs:
• 12 vCPUs
• 96 GB of RAM
• 2x 10GbE NICs
Support VM Specs:
• 2 vCPUs
• 8 GB of RAM
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Container-Native Storage Setup
● GlusterFS runs in Pods on app nodes
● GlusterFS uses host networking (same NIC as OpenShift SDN)
● Heketi pod runs inside OpenShift, orchestrating GlusterFS via kubeexec
● GlusterFS runs outside of OpenShift
● GlusterFS can use a different network than OpenShift SDN
● Heketi pod runs inside OpenShift, orchestrating GlusterFS via SSH
Coupled De-Coupled
Standard 3-node cluster design with 5 SSDs vs. 12 HDDs per node
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● Optimized database access with newer client libraries, stored procedures
● Known to be less demanding on the database
● Load driver accesses application via API (simulating end users)
● 5 GB database● Think time: 300 ms● 6 concurrent users / application stack● OCP stock mysql:5.7/php:5.6 images
Load Driver Setup - two versions of DVDStore
● stresses the database with lots of independent queries
● known to be IO centric● “headless” test mode: load driver
queries database directly● No product reviews● 20 GB database● Think time: 10ms● 8 concurrent users / database● OCP stock mysql:5.7 images
DS2 DS3OPM numbers
are not comparable!
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BENCHMARK RESULTS
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DVDStore2 - Driving the RDBMS
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DVDStore2 - Database only - CNS Spec #1
84 32 96 128
Average Transaction Response Time
UX Tolerance Limit 700ms
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DVDStore2 - Database only - CNS Spec #1
84 32 96 128
Aggregate Order Throughput results
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DVDStore2 - Database only - CNS Spec #1Investigating performance bottleneck - CPU utilization CNS nodes
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DVDStore2 - Database only - CNS Spec #2
84 32 96 128
Average Transaction Response Time with increased resources for CNS: 16 vCPU / 32GB vRAM
UX Tolerance Limit 700ms
Nearly sliced latency in half!
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DVDStore2 - Database only - CNS Spec #2
84 32 96 128
Aggregate Order Throughput results with increased resources for CNS: 16 vCPU / 32GB vRAM
More than twice the amount of OPM!
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DVDStore2 - Database only - CNS Spec #2Removing the bottleneck on CNS Nodes on SSD after going to 16 vCPUs
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DVDStore2 - Database only - CNS Spec #2Checking other resources for bottlenecks: SSD utilization on CNS nodes
5x HGST Ultrastar SS200 SSD
• SAS 12Gb/s
• 1.8GB/s read
• 1.0GB/s write
• 250K random read (4K)
• 37K random write (4K)
• 100 μs access latency
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DVDStore2 - Database only - CNS Spec #2Checking other resources for bottlenecks: SSD utilization on CNS nodes
5x HGST Ultrastar SS200 SSD
• SAS 12Gb/s
• 1.8GB/s read
• 1.0GB/s write
• 250K random read (4K)
• 37K random write (4K)
• 100 μs access latency
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DVDStore2 - Database only - CNS Spec #2Checking other resources for bottlenecks: SSD utilization on CNS nodes
5x HGST Ultrastar SS200 SSD
• SAS 12Gb/s
• 1.8GB/s read
• 1.0GB/s write
• 250K random read (4K)
• 37K random write (4K)
• 100 μs access latency
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DVDStore2 - Database only - CNS Spec #2Checking other resources for bottlenecks: memory and network utilization on CNS nodes with SSDs
Adding memory to CNS nodes helps with caching, less relevant with SSDs
10GbE starts to become a bottleneck
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VERDICT
➔ A 3 node CNS cluster runs 128 busy MySQL database instances very well!
➔ SSDs outperform HDDs for database-heavy loads, HDD not within UX tolerance
➔ Watch resource utilization, adding CPU to CNS nodes will have the biggest impact
➔ Transactional MySQL workload actually becomes more sequential on the backend
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DVDStore3 - Driving the whole stack
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DVDStore3 - LAMP Stack - CNS Spec #2
84 32 96 128
Average Transaction Response Time
UX Tolerance Limit 700ms
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DVDStore3 - LAMP Stack - CNS Spec #2
84 32 96 128
Aggregate Order Throughput results
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DVDStore2 - Database only - CNS Spec #2No obvious bottlenecks on CNS nodes
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DVDStore3 - LAMP Stack - CNS Spec #2CPU bottlenecks on Application nodes
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VERDICT
➔ Database-access and query optimization lead to shift in the bottleneck from DB disk to App CPU
➔ SSDs do not provide significant performance gain versus HDD
➔ Watch resource utilization, adding CPU to application nodes will have the biggest impact
➔ CNS resource entitlement could be scaled down to 6-8 vCPUs and 8GB RAM
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SUMMARY
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LEADING QUESTIONS:❖ What is the recommended setup to achieve good performance?
➢ Use SSDs and separate networks for IO-heavy/DB-centric workloads
➢ Know your workload!
❖ How many of these web application stacks can we run?
➢ 128 MySQL instances under an OLTP workload on SSDs and 16 vCPU CNS nodes
❖ How does workload and cluster performance scale as we increase load?
➢ CPU and Network utilization increases on DB heavy workloads
❖ Will this kind of workload need SSDs or HDDs?
➢ Yes for DS2, no for DS3
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SO WILL THIS RUN MYDATABASE?
MOST LIKELY YES!
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GET THE FULL WHITEPAPER:
https://red.ht/cns-mysql-performance-paper
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plus.google.com/+RedHat
linkedin.com/company/red-hat
youtube.com/user/RedHatVideos
facebook.com/redhatinc
twitter.com/RedHat
THANK YOU
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WHAT’S NEXT?
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TESTING BLOCK-STORAGE FROM CNSa.k.a gluster-block
OPENSHIFT NODE 2 OPENSHIFT NODE 3
OPENSHIFT NODE 1
RHGS Container RHGS Container
MASTER
APP Container APP Container
APP CONTAINER
OPENSHIFT NODE 4
RHGS Container
APP Container
LOOPBACK FILE
ISCSI TCMU
ISCSI LUN WITH XFS