Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)
One or more instances of any or all of the file selection criteria may be specified
within a single SELECT statement. If two or more selection criteria of different
types are specified in a single statement, a file must satisfy one criterion of each
type to be selected.
In the following example, only files that reside in either the ora/db or the
crash/dump directory, and whose owner is either user1 or user2 are selected for
possible action:
<SELECT>
<DIRECTORY Flags="nonrecursive">ora/db</DIRECTORY>
<DIRECTORY Flags="nonrecursive">crash/dump</DIRECTORY>
<USER>user1</USER>
<USER>user2</USER>
</SELECT>
A rule may include multiple SELECT statements. If a file satisfies the selection
criteria of one of the SELECT statements, it is eligible for action.
In the following example, any files owned by either user1 or user2, no matter in
which directories they reside, as well as all files in the ora/db or crash/dump
directories, no matter which users own them, are eligible for action:
<SELECT>
<DIRECTORY Flags="nonrecursive">ora/db</DIRECTORY>
<DIRECTORY Flags="nonrecursive">crash/dump</DIRECTORY>
</SELECT>
<SELECT>
<USER>user1</USER>
<USER>user2</USER>
</SELECT>
When VxFS creates new files, VxFS applies active placement policy rules in the
order of appearance in the active placement policy's XML source file. The first
rule in which a SELECT statement designates the file to be created determines the
file's placement; no later rules apply. Similarly, VxFS scans the active policy rules
on behalf of each file when relocating files, stopping the rules scan when it reaches
the first rule containing a SELECT statement that designates the file. This behavior
holds true even if the applicable rule results in no action. Take for example a
policy rule that indicates that .dat files inactive for 30 days should be relocated,
and a later rule indicates that .dat files larger than 10 megabytes should be
relocated. A 20 megabyte .dat file that has been inactive for 10 days will not be
relocated because the earlier rule applied. The later rule is never scanned.
Administering SmartTier
File placement policy rules
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