ClusterLion

Robert Graf | CEOMobile +43 664 1314403Email: rg@prolion.at

Overview

1. ProLion-NetApp Alliance

2. High Availability

3. Metro Cluster Challenges

4. ClusterLion Solution

5. ClusterLion vs. Common Solutions

6. ClusterLion Technology

7. Customer Benefits

8. References

NetApp Alliance

ProLion CEO Robert Graf: former NetApp Country Manager in Austria, 7 Years @ NetApp

ClusterLion only offered for NetApp MetroCluster NetApp Alliance Partner EU Distribution Partner: Arrow ECS

High Availability in IT

High Availability is a MUST in today’s IT world! This applies accross industries

Mission –critical applications must be available at all times!

Therefore, permanent IT availability “Always ON” is a prerequisite for many companies and no longer an option.

Any downtime costs money and image

Cost of Downtime

The cost by industry and studies vary, but it is clear that IT downtime causes considerable damage!

Split-Brain Syndrome Wikipedia: Split-brain indicates data or

availability inconsistencies originating from the maintenance of two separate data sets with overlap in scope, either because of servers in a network design, or a failure condition based on servers not communicating and synchronizing their data to each other.

High-availability clusters usually use a heartbeat private network connection which is used to monitor the health and status of each node in the cluster. For example the split-brain syndrome may occur when all of the private links go down simultaneously, but the cluster nodes are still running, each one believing they are the only one running.

The Challenge of Every Storage Cluster

Every storage vendor on the market needs a quorum, witness or tie-breaker to run automatic switchover in case of site-failure!

Expensive infrastructure investments in a 3rd data center location and highly redundant interconnects form the primary data centers to the quorum site are required!

No infrastructure investment is needed, which offers the lowest possible TCO for automatic switchover.

ClusterLion is only available for NetApp MetroCluster.

7 Mode or cDOT 2-Pack MetroCluster

Srvc (b)

cf giveback

Srvc (a)

system01 failed !takeover!

stretched HA

A/A Controller Failure Scenario1. 1st Controller fails2. Identity „moves“ to 2nd controller3. I/O passes through 2nd controller4. After repairing1st controller,

issue „cf giveback“5. Identity „moves“ back to 1st controller6. Normal operations continue

7 Mode or cDOT 2-Pack MetroCluster

Srvc (a) Srvc (b)

SiteA down orsite-connection broken?cf takeover -dcf giveback

stretched HA

MC Site Failure Scenario1. Entire Site A fails2. 2nd controller checks heartbeat, disk-

connections and IP connection while still serving its data

3. Human or process on 3rd Site identifies site-failure

4. Issue „cf takeover –d“5. Identity „moves“ to second controller

cDOT 4-Pack MetroCluster / local HA

MC Fabric

Srvc(a)

NO AUTOMATIC SWITCHOVER BETWEEN DATA CENTERS

stretched HAlocal HA local HA

Srvc(b)

ONTAP 8.3 MetroCluster DR Guide

Source: http://mysupport.netapp.com/documentation/docweb/index.html?productID=62093&language=en-US

ClusterLion – The Solution

UPSGrid100m

2x Ethernet

2x RS232

QRemote Quorum

100m

2x Ethernet2x RS232

Monitoring:• Power Supply• Storage Controller • Partner Status • Heart-Beat

1. Reporting:• A2: Active Controller Heartbeat• A1: Lost Cluster Partner, NVRAM

etc.• B2: No Controller Heartbeat• B1: Controller Error and Power

Alarm

2. Action:• B2: Power Off• B1: Power Off• A2: Active Controller Heartbeat• A1: Force Takeover• Q: Open Helpdesk Ticket

Switchover

ClusterLion

Open TicketPartner Helpdesk

Customer Support during Giveback

Telco BTelco A

Use Case: Power Outage

UPSGrid

MC Fabric

“Switchback”

A2 A1 B2 B1

Srvc(b)Srvc(a)

Srvc(b)

SRV1

Ethernet / SAN

SRV2

MetroCluster Switchover

TieBreaker Manual Switchover ClusterLion

Support for 7-Mode and cDOT MC config. ✔ ✔ ✔

Continues operation even during site-failure ✔ X ✔

Only two data centers are needed to run switchover X ✔ ✔

Highly secure against Split-Brain and data loss X ✔ ✔

Independet remote view on MetroCluster status X X ✔

Very easy to install and operate X ✔ ✔

Available solutions for NetApp MetroCluster switchover:

ClusterLion Technology

ClusterLion without Front Cover „Hot Swap“ Battery

ClusterLion Technology

4x Power Input 4x Power Output 2x Cooling Fans 2x 24V Output for UMTS

Gateways

Reset Button 2x Serial Consol Port 6x Ethernet Connectivity

ClusterLion Technology

Premium Support Contract: 24x7 Phone Support Proactive notification of the Customer Automatic support ticket at Storage Vendor Support during cluster giveback European Maintenance Partner: Econocom

Osiatis

ClusterLion Premium Support

Customer Benefits

ClusterLion increases the availability of your NetApp MetroCluster.

Even in the event of a total failure at one location, cluster services are properly delivered. All applications remain available.

ClusterLion works with only two locations. This reduces costs and complexity.

A third site (Quorum) will be provided by ProLion free of charge. ClusterLion prevents data corruption in case of Split Brain

syndrome. ClusterLion permanantly ensures a consistent state in the

storage cluster. ClusterLion can be retrofitted at any existing storage cluster.

...if you can afford to operate without

ClusterLion.

The question is not if you can afford ClusterLion,

but...Thank you!