Siemens SM2 monitoring system 用户手册
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U3585-J-Z125-8-76
PFA
SM2 monitoring programs
PFA
Monitored data on caches under User PFA
Monitored data on caches under User PFA
User PFA (User Controlled Performant File Access) allows users to assign performance
attributes to files, thus converting them into hiperfiles (High Performance Files). The idea
behind hiperfiles is that file access is accelerated by buffering the file in a high-speed cache
in order to avoid the slow disk input/output operations. The following cache media are used
for hiperfiles: main memory (MM), global storage (GS), 3419/21, 3860 and SYMMETRIX
cache controllers, and SSDs (solid state disks). Depending on the cache medium, the
caches are administered by DAB (main memory, ES, GS), by PCA (disk controllers with
cache, CTL), or by the hardware itself (SYMMETRIX).
attributes to files, thus converting them into hiperfiles (High Performance Files). The idea
behind hiperfiles is that file access is accelerated by buffering the file in a high-speed cache
in order to avoid the slow disk input/output operations. The following cache media are used
for hiperfiles: main memory (MM), global storage (GS), 3419/21, 3860 and SYMMETRIX
cache controllers, and SSDs (solid state disks). Depending on the cache medium, the
caches are administered by DAB (main memory, ES, GS), by PCA (disk controllers with
cache, CTL), or by the hardware itself (SYMMETRIX).
The PFA monitoring program records monitored data on all user PFA caches. This data may
overlap with that contained in the PCA, DAB and SYMMETRIX reports.
overlap with that contained in the PCA, DAB and SYMMETRIX reports.
Note
The PFA monitoring program also records information on SYMMETRIX controllers
which are not used in accordance with the PFA concept. This information is output to
the SYMMETRIX reports (see page 302ff) and applies globally to the SYMMETRIX
controller. In other words, the data output is not host-oriented.
The data in PFA reports refers to the PFA cache and is likewise not host-oriented.
Only SYMMETRIX reports should be taken into account for SYMMETRIX controllers.
With the introduction of SYMMETRIX reports, it no longer makes sense to configure
PFA pubsets in SYMMETRIX controllers.
which are not used in accordance with the PFA concept. This information is output to
the SYMMETRIX reports (see page 302ff) and applies globally to the SYMMETRIX
controller. In other words, the data output is not host-oriented.
The data in PFA reports refers to the PFA cache and is likewise not host-oriented.
Only SYMMETRIX reports should be taken into account for SYMMETRIX controllers.
With the introduction of SYMMETRIX reports, it no longer makes sense to configure
PFA pubsets in SYMMETRIX controllers.
POSIX
Monitored data on POSIX
Monitored data on POSIX
This monitoring program provides information on the POSIX subsystem.
This information corresponds to the options and output data of the SINIX command “sar”.
This information corresponds to the options and output data of the SINIX command “sar”.