Hp XP20000XP24000 Disk Array Manuel d'utilisateur télécharger pdf (Page 46)

2-28 About Cross-OS File Exchange Operations

Hitachi USP V Cross-OS File Exchange User’s Guide

FXotm with Variable-Length Record Format

FXotm operations can be performed on variable-length source files only if

delimiters have already been added to the source file (e.g., from a previous

FXmto operation). If a variable-length source file without delimiters is

processed, FCU will use the maximum record length to construct the target

data entities, thereby corrupting the data and rendering the dataset unusable.

FCU extracts but does not add delimiters to FXotm source files.

With delimiters. The figure below shows an FXotm operation for a variable-

length source file with delimiters. FCU extracts and transfers the data entities

to the target dataset, and automatically adds the four-byte RL field. The

delimiters are not transferred. The target dataset must have variable-length

record format.

Open-System Source File Target Dataset

Record length – 2 or 1 byte Record length

Data entity 1 D RL Record 1: Data entity 1

Data entity 2 D

→

RL Record 2: Data entity 2

Data entity 3 D RL Record 3: Data entity 3

Data entity + 1 or 2 bytes

Figure 2-19 FXotm with Variable-Length Records: Delimiters

If the length of any data entity in a UNIX source file is greater than the

maximum record length minus one byte (CR or LF delimiter), FCU aborts the

operation and reports an error. If the length of any data entity in a Windows

2000/2003/Windows NT source file is greater than the maximum record length

minus two bytes (CR+LF delimiter), FCU aborts the operation and reports an

error.

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Hp XP20000XP24000 Disk Array Manuel d'utilisateur Page 46