replay your workload as it is your actual one!
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21.12.2013
Replay your workload as it’s your actual one!
Boris HristovSQL Server DBA, Speaker, Trainer, Blogger
21.12.2013
Thank you to all our SPONORS!
Gold
Silver Bronze
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How many of you…
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Possible scenarios:
1.Application compatibility
2.Performance / Load testing
3.Forecasting
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What tools did we have till now?
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The Mighty Profiler
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RML Tools
ReadTrace Reporter
OSTRESS
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These are cool…
… but are just not cool enough!
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“There’s a new player in town!” DISTRIBUTED REPLAY
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So what’s Distributed Replay?
SQL Server 2012 feature
Available in all editions (kind of…)
Works with 2005 and higher (kind of…)
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Distributed Replay Components
1. Administration tool – the cmd tool to manage the replay1. Administration tool – the cmd tool to manage the replay
2. DReplay Controller – the brain behind the replay
3. DReplay Client – machines(up to 16) that replay the workload
4. Target Server – The SQL Server instance you replay against
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OK, but how are they working together?
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DEMO
Setting up DReplay Environment (installing gotchas)
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Installation requirements and gotchas1. Services must run under domain user accounts
2. Firewalls must allow the traffic of DR Components
3. DCOM permissions must be configured
4. SQL Server logins for the clients need to be created
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So how do we issue a replay?
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Step 1: Capture a trace!
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Step 2: Preprocesses the .trc file/s
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Step 3: Decide on replay mode and options
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Step 4: Replay the preprocessed trace
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DEMO
The Replay Process!
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Replay your workload. The steps.
1. Capture the workload with Profiler (TSQL-Replay)
2. Preprocess the trace with “dreplay preprocess”
3. Decide on a mode – synchronization or stress
4. Replay the workload with “dreplay replay”
5. Analyze the results
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The GUI that is in beta from 2011
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At the end
1. The Tool for replaying mission critical workloads
2. Don’t be afraid of not having a GUI
3. Capture -> Preprocess -> Replay
4. Document, blog, share it with the community!
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Resources
Channel 9 - Joe Sack(SQLSkills) Intro and Demo blog posts
Jonathan Kehayias(SQLSkills) Intro and Demo blog posts
Microsoft Peace of Mind Video
MSDN DocumentationDistributed Replay GUI (in beta)
… you and me now
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Thank you!
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