Boyan Ivanov - latency, the #1 metric of your cloud

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No two clouds are the same. Yet the leading clouds all have one thing in common: they deliver on metrics, which matter to the customer. In this session we'll dissect leading clouds, to show why low latency is the thing that makes a cloud stand out.

Technologie

Latency: the #1 metric of your
cloud
CloudStack User Group, 14 Mar 2019

ops/transactionspersecond
Dependency of any transaction processing system
Latency
Databases
Web Servers
Load balancers
Storage systems
Etc.

core core core core
task
Balancing work to be done with system resources

core core core core
task task
Balancing work to be done with system resources – 50%

core core core core
task task task task
Balancing work to be done with system resources – 100%

Latency
opspersecond
increasingload0->100%
Elasticity of an “ideal system in vacuum”

Latency
opspersecond
Elasticity of real systems

core core core core
task task task task task task
System overload

Latency
opspersecond
Regimes of any transaction processing system

Latency
opspersecond
best service
lowest cost per
delivered resource

Latency
opspersecond
best service
lowest cost per
delivered resource
only pain

Latency
opspersecond
best service
lowest cost per
delivered resource
only pain
systemthroughput

Latency
opspersecond
best service
lowest cost per
delivered resource
only pain
benchmarks

https://www.digitalocean.com/docs/volumes/

https://www.digitalocean.com/docs/volumes/overview/
Metrics of a Cloud Storage Layer

https://www.digitalocean.com/docs/volumes/overview/
Latency
The most
important
metric is
Missing!
Where is my Latency?!

random read/write 50/50, 4k, QD 1 avg. latency
DreamHost/DreamCompute (Ceph) 4.51 ms
DigitalOcean (Ceph) 1.75 ms
OVH (Ceph) 1.53 ms
Comparing some public Clouds

DreamHost/DreamCompute (Ceph) 4.51 ms
DigitalOcean (Ceph) 1.75 ms
OVH (Ceph) 1.53 ms
AWS EBS gp2 10k ($333/mo) 0.29 ms
Comparing some public Clouds
random read/write 50/50, 4k, QD 1 avg. latency
5 to 15 times faster!
For a lot of $$$ thought!

DreamHost/DreamCompute (Ceph) 4.51 ms
DigitalOcean (Ceph) 1.75 ms
OVH (Ceph) 1.53 ms
AWS EBS gp2 10k ($333/mo) 0.29 ms
eApps ($50/mo) 0.41 ms
Togglebox ($20/mo) 0.21 ms
StorPool BCP (Best Current Practice) 0.17 ms
random read/write 50/50, 4k, QD 1 avg. latency
Best-of-breed Clouds

Latency
opspersecond
10kIOPS
2ms
A volume with 2ms latency…

Latency
opspersecond
10kIOPS
0.3ms
…Vs. a volume with 0.3ms latency

4 vCPUs, 4 GB RAM
vdisk with 10k IOPS
"fast" volume with approx 0.3 ms latency (QD 1)
"slow" volume with 2 ms latency (QD 1)
with dm-delay in host
Both volumes are on the same SSD pool
Both volumes measure 10k IOPS flat
Same test VMs in all Cloud providers 2 disks – slow & fast

4 vCPUs, 4 GB RAM
vdisk with 10k IOPS
pgbench --client=8 --jobs=4
--progress=1 --time=5 pgbench4x
database size: 16 GB (4x RAM)
https://wiki.postgresql.org/wiki/Pgbenchtesting
Same test

DEMO
(embedded video on next slide)
/or click here if video does not play/

4 vCPUs, 4 GB RAM
vdisk with 10k IOPS
2ms storage latency = 900 TPS @ 8 ms pgbench
Results – slow volume

4 vCPUs, 4 GB RAM
vdisk with 10k IOPS
2ms storage latency = 900 TPS @ 8 ms pgbench
-> if we ask for 1200 TPS -> pile up
Results – slow volume under pressure – congestion!

4 vCPUs, 4 GB RAM
vdisk with 10k IOPS
0.3ms storage latency = 1600 TPS @ 5 ms pgbench
Results – fast volume

4 vCPUs, 4 GB RAM
vdisk with 10k IOPS
0.3ms storage latency = 1600 TPS @ 5 ms pgbench
-> if we ask for 1200 TPS - no problem
Results – fast volume under pressure – no problem

8 vCPUs, 16 GB RAM, dedicated if offered, database size = 4x RAM
https://wiki.postgresql.org/wiki/Pgbenchtesting
Comparing Clouds – AWS seems to rule them all?

8 vCPUs, 16 GB RAM, dedicated if offered, database size = 4x RAM
https://wiki.postgresql.org/wiki/Pgbenchtesting
Comparing Clouds – who can run a database?

Boyan Ivanov
StorPool Storage
info@storpool.com
www.storpool.com
@storpool
Thank you + Q&A!

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Vishesh has been working on the feature hypervisor-agnostic DRS in Cloudstack. He briefly overviews the implementation and discusses the algorithms currently available and how they can improve resource allocation and workload balancing in virtualized environments. Additionally, Vishesh showcases a live demo of hypervisor agnostic DRS in action, highlighting its capabilities and effectiveness. ----------------------------------------- The CloudStack Collaboration Conference 2023 took place on 23-24th November. The conference, arranged by a group of volunteers from the Apache CloudStack Community, took place in the voco hotel, in Porte de Clichy, Paris. It hosted over 350 attendees, with 47 speakers holding technical talks, user stories, new features and integrations presentations and more.

Hypervisor Agnostic DRS in CloudStack - Brief overview & demo - Vishesh Jinda...

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This session gives a brief introduction of the new and exciting feature in the latest (upcoming) CloudStack LTS release, ie, 4.19.0. The discussion includes the details on the timeline of the CloudStack 4.19.0 release, overview of some of the marquee, new feature of the release – Object storage framework, KVM ingestion, Hypervisor agnostic simple DRS, CAPC aware CKS, OAuth2, DRaaS with Multi zone disaster recovery, etc and a summary of improvements added since the previous major LTS release of the CloudStack, ie, 4.18.0. ----------------------------------------- The CloudStack Collaboration Conference 2023 took place on 23-24th November. The conference, arranged by a group of volunteers from the Apache CloudStack Community, took place in the voco hotel, in Porte de Clichy, Paris. It hosted over 350 attendees, with 47 speakers holding technical talks, user stories, new features and integrations presentations and more.

What’s New in CloudStack 4.19 - Abhishek Kumar - ShapeBlue

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