Data File Migration With Minimal Downtime

Nate Johnson weaves a yarn around moving from one storage system to another with minimal downtime:

Our ERP database has been chosen by the IT gods to get moved to the shiny new flash storage array, off the old spinning-rust SAN.  This is fantastic news for the business users.  But lo, the executives warn us, “You must do this with no downtime!” (said in my best Brent Ozar PHB-imitation voice).  Of course when we tell them that’s impossible, they say, “OK, you must do this with minimal downtime.”  That’s mo’ betta’.

So what are our typical options for doing a database migration?  Or, more specifically, a data file migration.  See, we’re not moving to a new server, and we’re not moving a bunch of databases together; we’re just moving this one ERP database.  And we’re keeping it on the same SQL instance, we’re just swapping the storage underneath.

Click through for some discussion on options, followed by implementation of a particular strategy.

Related Posts

Version Store and ONLINE Operations

Josh Darnell takes us through how SQL Server manages ONLINE = ON operations (such as index building and rebuilding) using the version store: The votes table has about 10 million rows in it, so this takes a bit of time (10-15 seconds if nothing else is happening). If I check sys.dm_tran_version_store_space_usage and sp_WhoIsActive, I can see that: – […]

Read More

Starting SQL Server in Single-User Mode

Ranga Babu has a few methods for starting SQL Server in single-user mode: It is advisable to use SQLCMD when you want to query SQL Server that is started in single user mode as connecting directly and query using SQL Server Management Studio that uses more than one connection. To query SQL Server single user […]

Read More

1 Comment

  • Nate on 2017-12-14

    Always appreciate the shout-out sir! I’m a day-late but I added the code snippet from Gist to go along w/ the post. :o)

Comments are closed

Categories

December 2017
MTWTFSS
« Nov Jan »
 123
45678910
11121314151617
18192021222324
25262728293031