Open System Services Management and Operations Guide (G06.25+, H06.03+)

Managing Filesets
Open System Services Management and Operations Guide—527191-002
5-19
Changing the Physical Makeup of a Fileset
Changing the Physical Makeup of a Fileset
You can change the physical makeup of a fileset by:
•
Changing the Fileset Catalog on page 5-20
•
To modify the limits in an existing fileset catalog, see Controlling the Maximum
Number of Files on page 6-29. on page 5-20
•
Removing a Disk Volume From a Storage-Pool File on page 5-21
•
Removing a Disk Volume From a Fileset on page 5-21
•
Moving a Disk Volume to Another Fileset on page 5-22
•
Controlling the Maximum Number of Files on page 6-29
Remember that a fileset can contain files on disk volumes that are not currently in the
fileset’s storage-pool file. When you perform operations that depend upon or potentially
change the device label for a fileset, you need to manage the files as well as the
fileset.
Not cached, file has
S_NONSTOP
attribute set but was
not opened with
O_SYNC flag
High Each input or output request
causes both of the following:
•
A message exchange
between the OSS file
system and the disk process
•
A checkpoint of data
between the primary and
backup disk processes
Slow performance
Not cached, file
does not have
S_NONSTOP
attribute set and
was opened with
O_SYNC flag
Higher Each input or output request
causes both of the following:
•
A message exchange
between the OSS file
system and the disk process
•
A physical write to disk
Slower performance
Not cached, file has
S_NONSTOP
attribute set and
was opened with
O_SYNC flag
Highest Each input or output request
causes all the following:
•
A message exchange
between the OSS file
system and the disk process
•
A checkpoint of data
between the primary and
backup disk processes
•
A physical write to disk
Slowest
performance
Table 5-1. OSS File Caching, Data Integrity, and File Access Speed (page 2 of 2)
Caching Status
Data
Integrity Message Exchanges
Performance
(Access Speed)