APAR status
Closed as program error.
Error description
Error Message: N/A . Stack Trace: N/A .
Local fix
Problem summary
z/OS Java uses the IBM z/OS C library for I/O to MVS datasets. The performance is significantly (3-4X) worse in terms of CPU time than native COBOL or Assembler.
Problem conclusion
This defect will be fixed in: 6.0.1 SR1 (z/OS 31-bit) . Implemented new JZOS APIs in the form of two public classes, com.ibm.jzos.RecordReader and com.ibm.jzos.RecordWriter that support sequential record I/O to non-VSAM MVS datasets. Sequential dataset I/O performance from Java should be on par with COBOL and/or Assembler.
Temporary fix
Comments
APAR Information
APAR number
PM54351
Reported component name
JAVA Z/OS 31
Reported component ID
620700105
Reported release
601
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-12-17
Closed date
2011-12-17
Last modified date
2011-12-17
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
JAVA Z/OS 31
Fixed component ID
620700105
Applicable component levels
R601 PSY
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