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compressing read only file groups


compressing read only file groups

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Jeff Moden
Jeff Moden
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muthyala_51 (2/27/2014)
i am not making the database into single user mode. I just leave the latest partition to read write and change the rest of the filegroups to read only. As paritions are based on date column, all new rows will be inserted into the latest file group.


That part of what I'm talking about. Last I heard, you had to set a database to "Single User" in order to be able to set a related file group to Read Only unless, of course, you're the only one in the database to begin with. Yeah... you can change it back Multi-User but I was just wondering how you set file groups to read only only without going through a pass through "SINGLE_USER".

Shifting gears back to your partitioning problem... it sounds like your table is actually a type of audit table table because you're setting partitions to Read Only based on a date. Is the date column, by any chance, a part of your PK?

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You don't write a trigger based on a range or partition. You write it based on the table.

If the read only groups are 3 months old, then your trigger just has something like

if datePKcolumn < dateadd( mm, -3, getdate()) then
rollback




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muth_51
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Jeff Moden (2/27/2014)
muthyala_51 (2/27/2014)
i am not making the database into single user mode. I just leave the latest partition to read write and change the rest of the filegroups to read only. As paritions are based on date column, all new rows will be inserted into the latest file group.


That part of what I'm talking about. Last I heard, you had to set a database to "Single User" in order to be able to set a related file group to Read Only unless, of course, you're the only one in the database to begin with. Yeah... you can change it back Multi-User but I was just wondering how you set file groups to read only only without going through a pass through "SINGLE_USER".

Shifting gears back to your partitioning problem... it sounds like your table is actually a type of audit table table because you're setting partitions to Read Only based on a date. Is the date column, by any chance, a part of your PK?


Yes, that's kind of an audit table with datetime part of PK. I was only the one who was accessing the database at the time of converting filegroups to read only mode, so it was easy for me to convert them without any errors.
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