1© copyright 2012 emc corporation. all rights reserved. emc vnx5700, emc fast cache, sql server...
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1© Copyright 2012 EMC Corporation. All rights reserved.
EMC VNX5700, EMC FAST Cache, SQL Server AlwaysOn Availability Groups
Strategic Solutions Engineering (SSE)EMC Solutions Group (ESG)
David RingMichael Morris
EMC MULTISITE DISASTER RECOVERY FOR MICROSOFT SQL SERVER 2012
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Agenda
EMC Proven Solutions
SQL Server 2012 Overview
Solution Overview
Architecture Design
Test Results
Summary
Q&A
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EMC Proven Solutions Approach
Capture and
define
Test and validate Document Publish
Singapore Shanghai, China
Cork, Ireland
Hopkinton, MA
Santa Clara, CA
Vienna, Austria
1 2 3 4
Req
uire
men
ts
…we champion the customers…and test the solutions you would like
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SQL Server AlwaysOn
High Availabilit
y
Disaster Recovery
Built on Windows Failover
Clustering•Shared Storage•Non-shared Storage
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SQL Server High Availability Features
HA Level Before SQL Server 2012 SQL Server 2012
Instance SQL Failover Cluster AlwaysOn Failover Cluster
Database
Backup and Restore Log Shipping Transactional Replication SQL Snapshot SQL Mirroring
+ AlwaysOn Availability Group
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AlwaysOn Failover Cluster
Microsoft SQL Server AlwaysOn Failover Cluster
Data
base
Pro
tect
ion
Shared storage
Passive secondary replicas
Protects server, instance, and database
Multi-subnet support now available
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SQL Server 2012:Multi-subnet Support
Clu
ster
Pro
pert
ies—
Dep
en
den
cies
Cluster Setup support—intelligently detects a multi-subnet environment
SQL Server Engine support—skips binding to any IP address that is not in an online state
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AlwaysOn Availability Groups
Microsoft SQL Server AlwaysOn Availability Group
Data
base
Pro
tect
ion
Synchronous or Asynchronous
Up to four replicas
Active secondary replicas
Protects database only
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Solution Purpose
SQL Server 2012 AlwaysOn– Characterize a geographically dispersed SQL Server 2012
environment protected by AlwaysOn technology, and highlight multi-subnet support at both synchronous and asynchronous distances.
EMC VNX5700 – Optimize database storage performance with EMC FAST Cache.– Integrate a simple, efficient, and powerful platform for enterprise-
class SQL Server 2012 infrastructures.– Validate the ability of the VNX5700 storage array to support SQL
Server 2012 instances running OLTP-like workloads that generate over 50,000 IOPS.
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Solution Architecture• 2 * SQL Servers
• 1 * Primary (Production)• 1 * Secondary (DR)
• FAST Cache on production
• 4 * DB’s: 1.8 TB of data• Dataset: 60% hot
FAST Cache impact: x4 (TPS/IOPS)
latency of <3ms
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SQL Server LayoutDescription Details / Measurement
SQL Server physical server (instances) One production SQL Server instance (primary replica)
One read-only secondary SQL Server instance (secondary replica)
SQL Server hardware configuration 32 core/256 GB memory(Processor: Intel Xeon X7560)
SQL Server user databases
• 4 x Databases
• 180,000 users
• 1.8 TB of data
1 x 50 GB (5,000 users)
1 x 250 GB (25,000 users)
1 x 500 GB (50,000 users)
1 x 1 TB (100,000 users)
Read/Write workload OLTP-like workload - 50,000 IOPS
Read/Write ratio of approximately 9:1
VNX storage pools One primary/secondary replica
Backup staging area for availability group seeding
2 TB
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Storage Design
Purpose Pool/RAID group Disk configuration RAID type
SQL System databases RAID group4 x 3.5”
600 GB 10k SASRAID 5
SQL TempDBs RAID group4 x 2.5”
600 GB 15k SASRAID 1/0
OLTP database logs RAID group
8 x 2.5”
600 GB 10k SAS
RAID 1/0
OLTP database data files Storage Pool40 x 2.5”
600 GB 10k SASRAID 5
FAST Cache pool FAST Cache pool
14 x 3.5”
100 GB Flash drives
RAID 1
Production array storage configuration
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0
10,000
20,000
30,000
40,000
50,000
11,537
19,340
32,928
45,193
50,043 50,085 51,848 52,147
1,483 2,313 3,1155,426 5,580 5,478 6,509 6,087
Primary ReplicaSecondary Replica
Baseline 2hr FAST Cache warmup FAST Cache Steady State
Transfers/sec (IOPs)
...800km …4,000kmDistance ...80km
Throughput in IOPS (transfers/sec)
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Comparison of Disk Reads/Writes On Primary And Secondary Replicas
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Baseline Synchronous 80km
Asynchronous 800km
Asynchronous 4,000km
0
25
50
75
100
76.48% 76.07% 80.09% 80.17%
1.70% 1.69% 1.97% 1.64%
Primary ReplicaSecomdary Replica
SQL Server CPU Utilization
SQL Server CPU impact across synchronization state and distance
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Baseline 2hr FAST Cache warmup FAST Cache Steady State
...800km ...4,000km
Distance ...80km
0
5,000
10,000
15,000
20,000
25,000
30,000
4,969
12,076
17,682
21,87024,007 23,959
25,517 25,317
324724 1,024 1,303 1,443 1,454 1,406 1,164
Primary Replica
Throughput in Transactions/Sec (TPS)
Disk transactions per sec (TPS) for both primary and secondary replicas
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Physical Disk Utilization
Physical disk utilization for storage pool on production and DR arrays
0%
25%
50%
75%
100%90% 90% 89% 86%
57% 56% 59% 56%
18% 17%
27%
52%
71% 69% 72% 69%
Primary Replica Secondary Replica
Baseline 2hr FAST Cache warmup FAST Cache Steady State
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Storage Processor Utilization
0%
25%
50%
75%
100%
14%
25%
41%
51%51%
15%
26%
43%
56%58%
5% 6%10% 10%
10%5% 6%13% 12%
13%
SPA - Pool 1: Production SPB - Pool 1: Production
SP utilization for SPA and SPB on production and DR storage arrays
Baseline 2hr FAST Cache warmup FAST Cache Steady State
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Availability Group Creation Process
1• Create Availability Group
2• Add Availability Group Listener
3• Backup Database from Primary Replica
4• Backup Log from Primary Replica
5• Restore Database to Secondary Replica(s)
6• Restore Log to Secondary Replica(s)
7• Join Secondary Replica(s) to Availability Group
8• For Additional Databases Repeat from Step 3
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Shared Storage Requirements For Seeding
A shared storage space is required when performing a Full Initial Data Synchronization as part of availability group creation.
Users should consider the storage used for these database backups and restorations.
The backup process has high bandwidth requirements for storage.
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Availability Group Creation Times
Synchronous and asynchronous availability group creation at 80, 800, 4,000 km
Availability Group
Mode Distance Duration
Max Bandwidth (MB/sec)
Backup Restore
OLTP_AG1 Synchronous 80 km 4hrs 14m 101.718 242.344
OLTP_AG2 Synchronous 80 km 4hrs 16m 109.683 254.839
OLTP_AG1Asynchronous 800 km 4hrs 48m 101.63 179.683
OLTP_AG2Asynchronous 800 km 8hrs 13m 110.78 189.489
OLTP_AG1Asynchronous 4000 km 5hrs 50m 114.661 119.243
OLTP_AG2Asynchronous 4000 km 8hrs 26m 100.541 259.641
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Summary• AlwaysOn Availability Groups
provide protection at database level• Synchronous – commit mode• Asynchronous – commit mode
• Power of the EMC VNX to host mission critical SQL Server 2012 environments
• FAST Cache • significantly boost performance• Incredibly low SQL Server datafile
latency <3 ms
FAST Cache increased SQL Server throughput by x4 (TPS/IOPS) while maintaining a very low
latency of <3ms