Short for 'Storage Area Network', a SAN is a network for block level storage. One or more controllers present logical drives (called LUNs) to one or more hosts through a switched fabric.
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I/O requests taking longer than 15 seconds
Usually our weekly full backups finish in about 35 minutes, with daily diff backups finishing in ~5 minutes. Since tuesday the dailies have taken almost 4 hours to complete, way more than should be ...
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3answers
739 views
Is there any benefit to defragmenting SQL indexes in a SAN environment?
Our SQL server lives on a SAN. It contains dozens of OLTP databases, some with several tables containing over 1m records.
We have been running Ola Hallengren's index maintenance scripts weekly, and ...
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2answers
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SQL Disk Setup Advice - TempDB, Log DB, Data file placement question
We have a very active database server with a ecclectic collection of applications running on it. Two of the busiest are a Laserfiche database that does document scanning and workflow processing all ...
3
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3answers
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Database IO comparison
We're running sql server on vmware. Our san is pretty new but still I think I/O is pretty crappy even though I'm supposed to be on separate spindels. Server speeds are:
My client machine:
Is our ...
3
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2answers
559 views
SAN block size for SQL Server on 4KB NTFS
A potential customer wants to evaluate our storage system. They run Windows 2008R2 x64 with 4KB NTFS on a virtual test machine they've sent us. They did not seem to know this at hand, so I think it's ...
3
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4answers
457 views
SQL Server - Separating data, log, and TempDB files on a SAN
I have a SQL Server connected to a SAN. Our new storage vendor recommends that all LUNs span the entire disk array, which is RAID5. I would normally request 3 separate LUNs (data, log, and TempDB) ...
2
votes
3answers
1k views
T-SQL query to report disk space allocation and used space for auto-grow SAN databases
We are using 6 databases in total for an application, and we can only share 4TB of space for all 6 databases (via SAN storage). I'd like to write a query (report) for a single database indicating the ...
2
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2answers
187 views
Investigating/Troubleshooting I/O Spikes
We have been experiencing some relatively large I/O (IOPS) spikes on the SAN that supports our production SQL Server.
The spikes seem to fall at an exact time after the hour, each hour. We have ...
