simple strategies for cutting the cost of high availability and disaster recovery for sql
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Clusters Your Way.™
SQL Server HA and DR:
A Simple Strategy for Realizing Dramatic Savings
Joey D’Antoni
Clusters Your Way.™
Joey D’Antoni
Joey has over 15 years of experience with a wide variety of data platforms, in both Fortune
50 companies as well as smaller organizations
He is a frequent speaker on database administration, big data, and career management
He is the co-president of the Philadelphia SQL Server User’s Group
He wants you to make sure you can restore your data
Joedantoni.wordpress.com – Blog
Joey D’Antoni
Joey D’Antoni
Clusters Your Way.™
Requirements for SQL Server High Availability
and Disaster Recovery
Three Step Strategy for Saving SQL HA and DR Costs
Saving Licensing Costs
Saving SAN Hardware Costs
Cost Summary
Agenda
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Clusters Your Way.™
Three Requirements for HA and DR:
SQL Server Software HA/DR Features
Replication for DR
Clusters for High Availability
SQL Server High Availability
and Disaster Recovery
SQL HA & DR
Features
Replication for DR
Clustersfor HA
Protection
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Clusters Your Way.™
Savings
1. Provide HA and DR with SQL Server
Standard Edition Licensing $74,096
2. Reduce the Cost of Software Assurance $35,888
3. Eliminate SAN-based Clusters TCO $735,944
Total $845,928
Simple Strategy for Cutting Costs
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Clusters Your Way.™
VS.SAN-based cluster SIOS #SANLess
cluster
Add SIOS #SANLess Software to a SQL Server WSFC
Host-based, block-level replication synchronizes
local storage in primary and standby servers
Manage replication and recovery at the host OS level
Implementing the Strategy:
#SANLess Clusters
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Clusters Your Way.™
Provides HA and DR with SQL Server Standard Edition
Reduces the Cost of Software Assurance
Eliminates the Need for SAN Storage
Adds Configuration Flexibility
Enables Use of High Performance SSD
Implementing the Strategy:
#SANLess Clusters
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Clusters Your Way.™
× HA and DR drawbacks
• Database Mirroring
– Marked for deprecation in SQL
Server 2012
– Labor-intensive manual
maintenance
• High Safety Mode
– Slows performance on the
primary server,
– Poorly suited for mirroring data
over long distances or over
higher latency connections
SQL Server Standard Edition
Cost Effective Licensing
• No significant changes from
2008R2/2012 licensing
• Buy a CAL for each user in your
company and then license each
server for a nominal fee
• $898 Per Server+$209 per CAL
• High availability included
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Clusters Your Way.™
Before SQL Server 2012:
License either by sockets,
or by server (one CAL per user)
$54,000 (list)
SQL Enterprise Edition Licensing Costs
Have Nearly Doubled
Since SQL Server 2012:
License by cores $82,488 (list)
– Costs increase dramatically on larger servers
One SQL Enterprise Edition license
for 2 sockets, 6-core processor
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Clusters Your Way.™
Adds up to 25% in Annual Recurring Costs
Required for:
Cold DR licensing — Create a standby site for DR
without purchasing an additional license
License mobility — Licenses float from one physical
machine to another, needed for VM environments
License upgrades — Upgrade from SQL Server
Standard Edition to Enterprise Edition, without
repurchasing the base license
Software Assurance
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Clusters Your Way.™
SQL Server software can be configured so that if one server
fails, its processing will be picked up, recovered and continued
by another server. Beginning with SQL Server 2014, each
active server licensed with SA coverage allows the installation
of a single passive server used for failover support.
April 1, 2014 Licensing Document
Surprise!
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Clusters Your Way.™
SQL Server Private Cloud (Virtualization)
Use Standard Edition
Consolidate Your SQL Server Instances
Development Environments and MSDN
Development Instances
Large organizations - may be worth licensing developers
with MSDN
It can be much cheaper than buying real licenses
Or develop under Developer Edition
Additional Ways to Reduce Licensing Costs
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Clusters Your Way.™
Storage array-based replication is complex and
expensive for DR
WSFC shared storage cannot span multiple sites
Storage array-based replication can be used for multisite
protection – requires identical SANs in primary and recovery
site
Expensive, vendor lock in, may require the purchase of
additional software from the SAN vendor
Why Not Use SAN Replication for DR?
17
Clusters Your Way.™
5-Year SAN TCO1
$387,068 for small SANs
$735,944, for mid-tier storage arrays
#SANLess Clusters Eliminate
specialized SAN labor expenses
Standard server hardware
Low-cost, easy-to-configure, local
storage and WSFC.
Intuitive configuration wizard and
management console
Storage Costs: SAN vs #SANLess
Notes:
1 Kaufmann, Aviv, and Mike Leone, “Dell EqualLogic PS Series Storage and TCO Analysis,” Enterprise Strategy Group Lab Repor
t. January 2014. http://en.community.dell.com/techcenter/extras/m/white_papers/20438150/download.aspx
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Clusters Your Way.™
Replicate between SAN or #SANLess clusters
Any combination of physical, virtual, or cloud (public,
private, or cloud)
#SANLess Clusters Add Flexibility
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Clusters Your Way.™
Save more than $800,000 dollars in license costs and
SAN five-year TCO
Easy, cost-effective alternative to traditional clusters
– a software ingredient in WSFC
Enable far more configuration flexibility than is possible in a
SAN-based cluster
#SANLess clusters save
hundreds of thousands of dollars
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Clusters Your Way.™
Joey D’Antoni
Solutions Architect, Anexinet
@jdanton on Twitter
jdanton1@yahoo.com
Joedantoni.wordpress.com
Questions?
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