June 2003
Intermediate to advanced
392 pages
13h 3m
English
book
IMS in the Parallel Sysplex Volume III IMSplex Implementation and Operations
by Jouko Jantti, Juan Jesús Iniesta Martínez, Knut Kubein, Bill Stillwell, Gary Wicks
Content preview from IMS in the Parallel Sysplex Volume III IMSplex Implementation and Operations
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180 IMS in the Parallel Sysplex, Volume III: IMSplex Implementation and Operations
AREA is stopped on that local system. If the CI is not in the CF, it is read from DASD and
written to the CF.
Write errors to a single CF structure:
IMS Version 7 exploits the I/O toleration (IOT) function that was previously used only by
full function databases, to improve the availability of data in a data entry database
(DEDB). IOT is used to store data from CIs that experience write I/O errors in IOT buffers
which are kept in storage and maintained across IMS restarts until the AREA concerned is
recovered.
When a write error occurs:
– An EEQE is created in the RECON.
– IOT buffer is built in ECSA.
– The AREA is flagged as
recovery needed in the RECON until ...
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